25September2018

Nano-Micro Letters

Towards Enhancing Wearability and Fashion of Wearable Supercapacitor with Modified Polyurethane Artificial Leather Electrolyte

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Yan Huang1, 2, Zijie Tang3, Zhuoxin Liu3, Jun Wei4, Hong Hu5, Chunyi Zhi3, *

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Nano-Micro Lett. (2018) 10: 38

First Online: 17 January 2018 (Article)

DOI:10.1007/s40820-018-0191-7

*Corresponding author. E-mail: cy.zhi@cityu.edu.hk

 

Abstract

 


Fig. 1 Schematics of PU artificial leather modification to serve as a polyelectrolyte of an artificial leather supercapacitor. a From wPU to miwPU: (i) wPU without free ions, (ii) iwPU with ionic groups grafted on polymer chains, (iii) miwPU with the presence of NaCl and dyes. b The artificial leather supercapacitor comprising the miwPU electrolyte, PPy@CNT sheet electrodes, and miwPU artificial leather with patterns transferred from an arbitrary substrate

Inspired by the sophisticated artificial leather garment industry and towards enhancing wearability of energy storage devices, we demonstrate a polyurethane artificial leather supercapacitor with large sheet electrodes embedded in the leather layer simultaneously working as a polyelectrolyte. This design totally reserves textiles underneath and thus addresses the well-known challenge of wearing comfortability. It provides a revolutionary configuration of wearable supercapacitors-the artificial leather on garment is also a supercapacitor. Unlike the polyvinyl alcohol-based acidic electrolytes, which are widely used, sodium chloride is used to modify the intrinsically fluorescent polyurethane leather for ionic transportation, which has no harm to human. The fluorescent leather supercapacitor is easily transferrable from any arbitrary substrates to form various patterns, enabling multifunctionalities of practical wearability, fashion and energy storage.


 

Keywords

Artificial leather; Neutral electrolyte; Wearable supercapacitor; Fluoresence

 

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1 Introduction

   Wearable energy storage devices are a critical element in personalized wearable electronics [1-4]. There is no doubt that textiles are most wearable due to their good comfortability and texture etc., which eventually arise from the micron size of polymeric filaments (5 µm) [1, 5]. When a bunch of such thin filaments are twisted to yarns and then further weaved/knitted to textiles, the softness as well as the concomitant comfortability and texture are well maintained. Although many yarn and textile supercapacitors [6-11] have been devloped and become one mainstream of wearable devices [12-16], this conventional form loses the comfortability and texture due to the incorporation of polyelectrolyte. As the thickness of polyelectrolytes (far larger than 100 µm) is much higher than the aforementioned comforting filament size (5 µm), these yarn and textile supercapacitors reported so far give rise to practical wearability challenges. Thus, the widely used form of yarn and textile supercapacitors fundamentally attributes to the limitation of insufficient wearability, which impose a considerable requirement on reforming wearable supercapacitors.

  The reformed wearable supercapacitor should maximize wearability. This requires maximum reservation of traditional textiles. Inspired by the configuration of leather garment, we propose an artificial leather supercapacitor as an alternative approach. By the design of supercapacitor in the layer of artificial leather on a leather garment, traditional textiles underneath can be totally reserved. This achieves the same comfortability and wearability as of common leather garment. This makes the artificial leather supercapacitor an excellent reform for wearable supercapacitors.

  Notably, compared with polyvinyl alcohol (PVA), polyurethane (PU) is widely used as an artificial leather. Nevertheless, pristine PU is not ion conductive and cannot work as an electrolyte. In this paper, PU is modified to be ion conductive by the incorporation of ionic groups in aqueous solvent and non-hazardous sodium chloride (NaCl) is used to further improve the ionic transportation, avoiding the potential harm of acid to human. There are no functional groups on the backbone of the modified PU that restrain free sodium ions, thus providing decent ion conductivity. Moreover, PU is easily transferrable from arbitrary substrates and intrinsically fluorescent. These are not exhibited by the widely used PVA-based electrolytes and provide potential fashion garment application. As a proof-of-concept study, a supercapacitor sleeve is fabricated by using large carbon nanotube (CNT) sheet electrodes deposited with polypyrrole (PPy) and the modified PU as both electrolyte and artificial leather, which emits near-blue fluorescence and powers a light-emitting diode.

2 Experimental

2.1  Modification of Water-based PU and Fabrication of the Artificial Leather Supercapacitor

  Carboxyl groups were introduced into the water-based PU (wPU) and various NaCl (0.025 to 0.25 M) and dyes (10 µm) were added into the resultant ionic wPU (iwPU) dispersion under vigorous stirring for 0.5 h. The as-mixed dispersion was dried at room temperature to form miwPU films. Then CNT sheets were electrodeposited with PPy up to 1.2 mg at 0.8 V vs. Ag/AgCl up to 5 min at 0 °C, in an electrolyte solution (30 mL) containing 0.1 M p-toluenesulfonic acid, 0.3 M sodium toluenesulfate and 15 µL pyrrole monomer. Besides serving as the suppliers of p-toluenesulfate, they can stabilize the pH of the solution, which is a key factor in the PPy electropolymerization. Pyrrole monomers were purified by distilling before electrodeposition. Two PPy@CNT sheets were on each side of the miwPU polyelectrolyte film. Finally, two miwPU artificial leathers were deposited on these two sheets.

2.2  Electrochemical Characterization

    CV and GCD of supercapacitor devices were tested by a potentiostat (CHI 760E) at room temperature. The capacitance of the single electrode (Cm) was calculated from GCD and CV curves according to Eqs. 1 and 2, respectively:

10 2 38 gs12

where I is the discharge current of GCD, t is the dicharge time of GCD, U is the voltage window (U = U+ − U), m is the mass of PPy electrode,  is the scan rate of CV, and i(U) is the current of CV. 

3 Results and Discussion

3.1 Modification and Physicochemical Properties of PU Artificial Leather as a Polyelectrolyte

    As an ideal substitute for natural leather, PU artificial leather has been substantially applied in the garment industry. wPU has gradually replaced that of the organic solvent-based and become an important direction for industrial development. As illustrated in Fig. 1ai, PU chains are well dispersed in the water. When ionic groups such as carboxyls are grafted on PU chains, it becomes iwPU (Fig. 1aii). During the pre-step polymerization of wPU monomers, carboxyl-contained chain extenders are added and then grafted on PU chains after polymerization. Its ionic conductivity is enhanced due to the incorporation of ions. Non-hazadous strong electrolyte NaCl as well as a few dye molecules (10 µM) are added to further modify the iwPU (miwPU) in order to remarkably increase the ion concentration and to display various colors for serving as both a harmless electrolyte and a colored artificial leather simultaneously (Fig. 1aiii, and Fig. S1). Therefore, the miwPU film is used as the electrolyte and the artificial leather. CNT sheets and PPy thin films electrodeposited are employed current collectors and active materials, respectively (Fig. 1b). Besides capacitance contribution, the intrinsically flexible and stable PPy serves as a good stress buffer which is a desirable feature of wearable devices because they always have to experience various deformations [17-21]. The whole supercapacitor is imbedded in the miwPU film to form an artificial leather supercapacitor. Arbitrary patterns are easily transferred onto the miwPU artificial leather supercapacitor by peeling off from arbitrary substrates. Such arbitrary pattern transferring is unique in most publications on wearable supercapacitors due to the use of the artificial leather.

Fig. 1 Schematics of PU artificial leather modification to serve as a polyelectrolyte of an artificial leather supercapacitor. a From wPU to miwPU: (i) wPU without free ions, (ii) iwPU with ionic groups grafted on polymer chains, (iii) miwPU with the presence of NaCl and dyes. b The artificial leather supercapacitor comprising the miwPU electrolyte, PPy@CNT sheet electrodes, and miwPU artificial leather with patterns transferred from an arbitrary substrate

Fig. 1 Schematics of PU artificial leather modification to serve as a polyelectrolyte of an artificial leather supercapacitor. a From wPU to miwPU: (i) wPU without free ions, (ii) iwPU with ionic groups grafted on polymer chains, (iii) miwPU with the presence of NaCl and dyes. b The artificial leather supercapacitor comprising the miwPU electrolyte, PPy@CNT sheet electrodes, and miwPU artificial leather with patterns transferred from an arbitrary substrate

    As demonstrated in Fig. 2a, two main peaks at around 409 and 430 nm are observed in the emission spectra, which correspond to the blue fluorescence. The intrinsic fluorescence behavior of iwPU is not changed by the addition of NaCl, validating the feasibility as multifunctional miwPU. The fluorescence plays an important role in endowing the artificial leather supercapacitor an element of fashion. Raman spectra and mechanical performances are also unaffected by NaCl (Fig. S2), indicating an absence of bond interactions and the existence of free ions. A morphology observation of cryo-dried samples using scanning electron microscopy (SEM) demonstrates that a porous microstructure appears both in iwPU and miwPU with the pore size around 100 µm (Fig. S3). The absence of bond interactions and the existence of free ions results in decent ionic conductivity of miwPU (Fig. 2b). The ionic conductivity remarkably changes with the content of NaCl. With the increase in the NaCl content, the conductivity substantially increases with the concentration and then decreases, appearing the highest value. This suggests that the concentration affects the conductivity from two opposite directions. For very dilute concentration, when it increases, the increase of ion amounts plays a dominant role and thus the conductivity increases. When the concentration increases to 0.25 M, the ionic interaction becomes a dominant role and therefore the conductivity decreases. Together with the miwPU as the polyelectrolyte, PPy@CNT sheet electrodes are utilized to fabricate the wearable, transferrable and fluorescent supercapacitor. Raman spectra confirmed the species of CNT and PPy (Fig. S4). Figure 2c, d shows that CNT sheets are made of interweaved nanowires and the electrodeposited PPy is a uniform thin film on CNT sheets. It is noteworthy that there is no crack on the intentionally folded electrodes due to the their great flexibility.

Fig. 2 a Fluorescence emission spectra of miwPU films with and without NaCl modification when excited at 365 nm (Inset is a photograph of the miwPU film under the excitation). b Ionic conductivities at various contents of NaCl in the miwPU film. c An SEM picture of CNT sheets (Scale bar is 1 µm). d An SEM picture of the CNT sheets on which PPy are electrodeposited (Scale bar is 1 µm).

Fig. 2 a Fluorescence emission spectra of miwPU films with and without NaCl modification when excited at 365 nm (Inset is a photograph of the miwPU film under the excitation). b Ionic conductivities at various contents of NaCl in the miwPU film. c An SEM picture of CNT sheets (Scale bar is 1 µm). d An SEM picture of the CNT sheets on which PPy are electrodeposited (Scale bar is 1 µm).

3.2 Electrochemical Characterization

    Electrochemical performances are systematcially studied on the miwPU polyelectrolyte in the supercapacitor as aforedescribed. Figure 3a, b shows a series of cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD) profiles. At scan rates up to 0.25 V s-1, CVs display a rectangular shape. At higher scan rates of 0.5 and 1 V s-1, CVs start to display some features of a resistor. This mainly arises from higher ionic transfer resistance due to the diffusion limitation [20]. For all current densities studied here, the supercapacitor retains the shape of almost isosceles triangles. Although CNT and PPy both contribute to the capacitance, it is clearly seen that the contribution from PPy is much higher (~11 times) than that of CNT (Fig. S5), validating the use of PPy as the electrodes. Figure 3c shows the areal capacitances calculated from the CV and GCD profiles above. Considered the large area of an artificial leather garment, the total capacitance could be enhanced vastly. Mass capacitances of PPy up to 105 F g-1 are shown in Fig. S6, which are comparable to other reports [22-27]. By contrast to capacitances obtained from acidic polyelectrolytes, these results are lower mainly due to the inferior ionic conductivity of NaCl than that of acid [17, 20, 21]. Consistent with the ionic conductivity trend with the NaCl content, the capacitance of the miwPU polyelectrolyte initially increases with the concentration and then decreases (Fig. S7). In addition to NaCl concentration, the water content also greatly affects electrochemical performances (Fig. S8). The solvent water exists in the gel, forming a free-standing polyelectrolyte without any fluidity and therefore avoiding the risk of leakage. The cycling stability test shows that the supercapacitor has a capacitance reservation of 80% after over 2,500 cycles with Coulombic efficiency ~100% during all these cycles (Fig. 3d), which are better than PPy-based supercapacitors reported [23]. The initial degradation should be attributed to the loss of the water solvent. All GCD profiles are similar in the whole cycling test and even almost overlay since the 1000th cycle, indicating unchanged electrochemical dynamic processes. Performance comparisons are summarized in Table S1.

Fig. 3 a CV profiles at scan rates ranging from 0.005 to 1 V s-1. b GCD profiles at current densities ranging from 5 to 250 µA cm-2. c Areal capacitances calculated according to CV (red) and GCD (blue) profiles of the PPy@CNT sheet electrode using the miwPU polyelectrolyte. d Charge/discharge cycling stability (inset is GCD curves at various cycle numbers). e CV profiles of the supercapacitor undergoing consecutive deformations (scan rate: 0.05 V s-1). f CV profiles of the waterproof spray-sprinkled supercapacitor prior to and after water sputtering (scan rate: 0.1 V s-1)

Fig. 3 a CV profiles at scan rates ranging from 0.005 to 1 V s-1. b GCD profiles at current densities ranging from 5 to 250 µA cm-2. c Areal capacitances calculated according to CV (red) and GCD (blue) profiles of the PPy@CNT sheet electrode using the miwPU polyelectrolyte. d Charge/discharge cycling stability (inset is GCD curves at various cycle numbers). e CV profiles of the supercapacitor undergoing consecutive deformations (scan rate: 0.05 V s-1). f CV profiles of the waterproof spray-sprinkled supercapacitor prior to and after water sputtering (scan rate: 0.1 V s-1)

     Deformation stability is definately required for practical wearing applications. Our supercapacitor experiences a series of deformation test, such as being folded at 0°, 45°, 90°, 135°, 180° and twisted. All CV curves overlap almost completely during the whole deformation process (Fig. 3e), revealing the excellent device flexbility required for wearable electronics due to the good mechanical property of the PU gel [28] (Fig. S2). Moreover, another important feature for practical wearable applications is being impervious to water. By sprinkling waterproof spray onto the miwPU artificial leather supercapacitor, the CV curves are almost identical before and after water sputtering (Fig. 3f), suggesting a potential solution to all wearable devices with water-compatible polyelectrolytes.

3.3 Wear the Fluorescent miwPU Artificial Leather Supercapacitor Sleeve

    The miwPU artificial leather supercapacitor demonstrates an excellent pattern diversity (Fig. 4a). Arbitrary patterns can be easily transferred onto the leather by just peeling off from any patterned substrates. All patterned leathers exhibit the fluorescence effect with slight differences, which is likely caused by their color differences due to the use of different dyes in the miwPU as shown in Fig. S1. The electrochemical performances are not affected by either the patterns or the colors (Fig. 4b, c and Fig. S9), validating the integration of supercapacitor and artificial leather. Notably, the IR drop in the discharging curve is relatively large due to the low water solvent content in the gel electrolyte.

Fig. 4 a Fluorescent miwPU artificial leathers with various patterns. b CV curves of patterned miwPU artificial leather supercapacitors. c GCD curves of patterned miwPU artificial leather supercapacitors. d The fluorescent supercapcitor sleeve under excitation. e The supercapacitor sleeve powering a light-emitting diode

Fig. 4 a Fluorescent miwPU artificial leathers with various patterns. b CV curves of patterned miwPU artificial leather supercapacitors. c GCD curves of patterned miwPU artificial leather supercapacitors. d The fluorescent supercapcitor sleeve under excitation. e The supercapacitor sleeve powering a light-emitting diode

    Two to four supercapacitors are assembled both in parallel (Fig. S10a, b) and in series (Fig. S10c, d) for practical applications. The charge/discharge time and thus the overall capacitance increases linearly with the number of supercapacitorsin parallel. Similarly, the overall capacitance linearly decreases with the reciprocal of the number of supercapacitors in series. The combination of good flexibility and scalability of supercapacitors validates the wearable application. We fabricate a supercapacitor sleeve by using in-series and in-parallel assemblies which displays the fluorescence effect (Fig. 4d) and powers a light-emitting diode (Fig. 4e).

4 Conclusions

     In summary, polyurethane artificial leather is modified with carboxyl groups and non-hazardous sodium chloride to serve as a polyelectrolyte and meanwhile maintains the intrinsic property of fluorescence effect. The artificial leather supercapacitor using sheet electrodes exhibits excellent flexibility, pattern diversity, scalability, and high compatibility with artificial leather industrial processing techniques. As a demonstration, a fluorescent supercapacitor sleeve is fabricated by using these supercapacitors to power a light-emitting diode, realizing the energy storage, fluorescence capability and wearability. Inheriting from the great wearability of artificial leather garment, the artificial leather supercapacitor has no problem of the practical comforting wearability of textiles, thus providing a reform of the mainstream yarn/textile-based supercapacitors and creating considerable potential for more practical applications of wearable electronics. 

Acknowledgment

    The authors appreciate Z.G. Wang and T.F. Hung for experimental support. The Startup Funding of Harbin Institute of Technology (Shenzhen) (DD45001015), NSFC/RGC Joint Research Scheme (Project N_CityU123/15), the Science Technology and Innovation Committee of Shenzhen Municipality (JCYJ20130401145617276 and R-IND4903), City University of Hong Kong (PJ7004645) and the Hong Kong Polytechnic University (1-BBA3) supported this work.

References

[1] W. Zeng, L. Shu, Q. Li, S. Chen, F. Wang, X.M. Tao, Fiber-based wearable electronics: A review of materials, fabrication, devices, and applications. Adv. Mater. 26(31), 5310-5336 (2014). https://doi.org/10.1002/adma.201400633
[2] T. Chen, L.M. Dai, Carbon nanomaterials for high-performance supercapacitors. Mater. Today 16(7-8), 272-280 (2013). https://doi.org/10.1016/j.mattod.2013.07.002
[3] L.B. Dong, C.J. Xu, Y. Li, C.L. Wu, B.Z. Jiang, Q. Yang, E.L. Zhou, F.Y. Kang, Q.H. Yang, Simultaneous production of high-performance flexible textile electrodes and fiber electrodes for wearable energy storage. Adv. Mater. 28(8), 1675-1681 (2016). https://doi.org/10.1002/adma.201504747
[4] Y.B. Wang, C.J. Chen, H. Xie, T.T. Gao, Y.G. Yao et al., 3D-printed all-fiber Li-ion battery toward wearable energy storage. Adv. Funct. Mater. 27(43), 1703140 (2017). https://doi.org/10.1002/Adfm.201703140
[5] Q.Y. Huang, D.R. Wang, Z.J. Zheng, Textile-based electrochemical energy storage devices. Adv. Energy Mater. 6(22), 1600783 (2016). https://doi.org/10.1002/Aenm.201600783
[6] D.S. Yu, K. Goh, H. Wang, L. Wei, W.C. Jiang, Q. Zhang, L.M. Dai, Y. Chen, Scalable synthesis of hierarchically structured carbon nanotube-graphene fibres for capacitive energy storage. Nat. Nanotechnol. 9(7), 555-562 (2014). https://doi.org/10.1038/Nnano.2014.93
[7] D.H. Zhang, M.H. Miao, H.T. Niu, Z.X. Wei, Core-spun carbon nanotube yarn supercapacitors for wearable electronic textiles. ACS Nano 8(5), 4571-4579 (2014). https://doi.org/10.1021/Nn5001386
[8] Q.H. Meng, H.P. Wu, Y.N. Meng, K. Xie, Z.X. Wei, Z.X. Guo, High-performance all-carbon yarn micro-supercapacitor for an integrated energy system. Adv. Mater. 26(24), 4100-4106 (2014). https://doi.org/10.1002/adma.201400399
[9] Q.H. Meng, K. Wang, W. Guo, J. Fang, Z.X. Wei, X.L. She, Thread-like supercapacitors based on one-step spun nanocomposite yarns. Small 10(15), 3187-3193 (2014). https://doi.org/10.1002/smll.201303419
[10] J.A. Lee, M.K. Shin, S.H. Kim, H.U. Cho, G.M. Spinks et al., Ultrafast charge and discharge biscrolled yarn supercapacitors for textiles and microdevices. Nat. Commun. 4, 1970 (2013). https://doi.org/10.1038/Ncomms2970
[11] C.Z. Wei, Q. Xu, Z.Q. Chen, W.D. Rao, L.L. Fan, Y. Yuan, Z.K. Bai, J. Xu, An all-solid-state yarn supercapacitor using cotton yarn electrodes coated with polypyrrole nanotubes. Carbohyd. Polym. 169, 50-57 (2017). https://doi.org/10.1016/j.carbpol.2017.04.002
[12] X.B. Wang, Y.J. Zhang, C.Y. Zhi, X. Wang, D.M. Tang et al., Three-dimensional strutted graphene grown by substrate-free sugar blowing for high-power-density supercapacitors. Nat. Commun. 4, 2905 (2013). https://doi.org/10.1038/Ncomms3905
[13] X.F. Wang, B. Liu, R. Liu, Q.F. Wang, X.J. Hou, D. Chen, R.M. Wang, G.Z. Shen, Fiber-based flexible all-solid-state asymmetric supercapacitors for integrated photodetecting system. Angew. Chem. Int. Ed. 53(7), 1849-1853 (2014). https://doi.org/10.1002/anie.201307581
[14] X.H. Cao, Z.Y. Yin, H. Zhang, Three-dimensional graphene materials: Preparation, structures and application in supercapacitors. Energy Environ. Sci. 7(6), 1850-1865 (2014). https://doi.org/ 10.1039/C4ee00050a
[15] V.L. Pushparaj, M.M. Shaijumon, A. Kumar, S. Murugesan, L. Ci, R. Vajtai, R.J. Linhardt, O. Nalamasu, P.M. Ajayan, Flexible energy storage devices based on nanocomposite paper. PNAS 104(34), 13574-13577 (2007). https://doi.org/10.1073/pnas.0706508104
[16] H. Kim, J.H. Ahn, Graphene for flexible and wearable device applications. Carbon 120, 244-257 (2017). https://doi.org/10.1016/j.carbon.2017.05.041
[17] Y. Huang, J.Y. Tao, W.J. Meng, M.S. Zhu, Y. Huang, Y.Q. Fu, Y.H. Gao, C.Y. Zhi, Super-high rate stretchable polypyrrole-based supercapacitors with excellent cycling stability. Nano Energy 11, 518-525 (2015). https://doi.org/10.1016/j.nanoen.2014.10.031
[18] Y. Huang, H. Hu, Y. Huang, M.S. Zhu, W.J. Meng, C. Liu, Z.X. Pei, C.L. Hao, Z.K. Wang, C.Y. Zhi, From industrially weavable and knittable highly conductive yarns to large wearable energy storage textiles. ACS Nano 9(5), 4766-4775 (2015). https://doi.org/10.1021/acsnano.5b00860
[19] Y. Huang, Y. Huang, W.J. Meng, M.S. Zhu, H.T. Xue, C.S. Lee, C.Y. Zhi, Enhanced tolerance to stretch-induced performance degradation of stretchable MnO2-based supercapacitors. ACS Appl. Mater. Interfaces 7(4), 2569-2574 (2015). https://doi.org/10.1021/Am507588p
[20] Y. Huang, M. Zhong, Y. Huang, M.S. Zhu, Z.X. Pei, Z.F. Wang, Q. Xue, X.M. Xie, C.Y. Zhi, A self-healable and highly stretchable supercapacitor based on a dual crosslinked polyelectrolyte. Nat. Commun. 6, 10310 (2015). https://doi.org/10.1038/Ncomms10310
[21] Y. Huang, M.S. Zhu, Z.X. Pei, Y. Huang, H.Y. Geng, C.Y. Zhi, Extremely stable polypyrrole achieved via molecular ordering for highly flexible supercapacitors. ACS Appl. Mater. Interfaces 8(3), 2435-2440 (2016). https://doi.org/10.1021/acsami.5b11815
[22] B.B. Yue, C.Y. Wang, X. Ding, G.G. Wallace, Polypyrrole coated nylon lycra fabric as stretchable electrode for supercapacitor applications. Electrochim. Acta 68, 18-24 (2012). https://doi.org/ 10.1016/j.electacta.2012.01.109
[23] T. Liu, L. Finn, M. Yu, H. Wang, T. Zhai, X. Lu, Y. Tong, Y. Li, Polyaniline and polypyrrole pseudocapacitor electrodes with excellent cycling stability. Nano Lett. 14(5), 2522-2527 (2014). https://doi.org/10.1021/nl500255v
[24] H. Fu, Z.J. Du, W. Zou, H.Q. Li, C. Zhang, Carbon nanotube reinforced polypyrrole nanowire network as a high-performance supercapacitor electrode. J. Mater. Chem. A 1(47), 14943-14950 (2013). https://doi.org/10.1039/C3ta12844j
[25] D. Zhang, Q.Q. Dong, X. Wang, W. Yan, W. Deng, L.Y. Shi, Preparation of a three-dimensional ordered macroporous carbon nanotube/polypyrrole composite for supercapacitors and diffusion modeling. J. Phys. Chem. C 117(40), 20446-20455 (2013). https://doi.org/10.1021/Jp405850w
[26] H.P. de Oliveira, S.A. Sydlik, T.M. Swager, Supercapacitors from free-standing polypyrrole/graphene nanocomposites. J. Phys. Chem. C 117(20), 10270-10276 (2013). https://doi.org/ 10.1021/Jp400344u
[27] S. Biswas, L.T. Drzal, Multi layered nanoarchitecture of graphene nanosheets and polypyrrole nanowires for high performance supercapacitor electrodes. Chem. Mater. 22(20), 5667-5671 (2010). https://doi.org/10.1021/Cm101132g
[28] Y. Huang, Y. Huang, M.S. Zhu, W.J. Meng, Z.X. Pei, C. Liu, H. Hu, C.Y. Zhi, Magnetic-assisted, self-healable, yarn-based supercapacitor. ACS Nano 9(6), 6242-6251 (2015). https://doi.org/10.1021/acsnano.5b01602

References

[1] W. Zeng, L. Shu, Q. Li, S. Chen, F. Wang, X.M. Tao, Fiber-based wearable electronics: A review of materials, fabrication, devices, and applications. Adv. Mater. 26(31), 5310-5336 (2014). https://doi.org/10.1002/adma.201400633
[2] T. Chen, L.M. Dai, Carbon nanomaterials for high-performance supercapacitors. Mater. Today 16(7-8), 272-280 (2013). https://doi.org/10.1016/j.mattod.2013.07.002
[3] L.B. Dong, C.J. Xu, Y. Li, C.L. Wu, B.Z. Jiang, Q. Yang, E.L. Zhou, F.Y. Kang, Q.H. Yang, Simultaneous production of high-performance flexible textile electrodes and fiber electrodes for wearable energy storage. Adv. Mater. 28(8), 1675-1681 (2016). https://doi.org/10.1002/adma.201504747
[4] Y.B. Wang, C.J. Chen, H. Xie, T.T. Gao, Y.G. Yao et al., 3D-printed all-fiber Li-ion battery toward wearable energy storage. Adv. Funct. Mater. 27(43), 1703140 (2017). https://doi.org/10.1002/Adfm.201703140
[5] Q.Y. Huang, D.R. Wang, Z.J. Zheng, Textile-based electrochemical energy storage devices. Adv. Energy Mater. 6(22), 1600783 (2016). https://doi.org/10.1002/Aenm.201600783
[6] D.S. Yu, K. Goh, H. Wang, L. Wei, W.C. Jiang, Q. Zhang, L.M. Dai, Y. Chen, Scalable synthesis of hierarchically structured carbon nanotube-graphene fibres for capacitive energy storage. Nat. Nanotechnol. 9(7), 555-562 (2014). https://doi.org/10.1038/Nnano.2014.93
[7] D.H. Zhang, M.H. Miao, H.T. Niu, Z.X. Wei, Core-spun carbon nanotube yarn supercapacitors for wearable electronic textiles. ACS Nano 8(5), 4571-4579 (2014). https://doi.org/10.1021/Nn5001386
[8] Q.H. Meng, H.P. Wu, Y.N. Meng, K. Xie, Z.X. Wei, Z.X. Guo, High-performance all-carbon yarn micro-supercapacitor for an integrated energy system. Adv. Mater. 26(24), 4100-4106 (2014). https://doi.org/10.1002/adma.201400399
[9] Q.H. Meng, K. Wang, W. Guo, J. Fang, Z.X. Wei, X.L. She, Thread-like supercapacitors based on one-step spun nanocomposite yarns. Small 10(15), 3187-3193 (2014). https://doi.org/10.1002/smll.201303419
[10] J.A. Lee, M.K. Shin, S.H. Kim, H.U. Cho, G.M. Spinks et al., Ultrafast charge and discharge biscrolled yarn supercapacitors for textiles and microdevices. Nat. Commun. 4, 1970 (2013). https://doi.org/10.1038/Ncomms2970
[11] C.Z. Wei, Q. Xu, Z.Q. Chen, W.D. Rao, L.L. Fan, Y. Yuan, Z.K. Bai, J. Xu, An all-solid-state yarn supercapacitor using cotton yarn electrodes coated with polypyrrole nanotubes. Carbohyd. Polym. 169, 50-57 (2017). https://doi.org/10.1016/j.carbpol.2017.04.002
[12] X.B. Wang, Y.J. Zhang, C.Y. Zhi, X. Wang, D.M. Tang et al., Three-dimensional strutted graphene grown by substrate-free sugar blowing for high-power-density supercapacitors. Nat. Commun. 4, 2905 (2013). https://doi.org/10.1038/Ncomms3905
[13] X.F. Wang, B. Liu, R. Liu, Q.F. Wang, X.J. Hou, D. Chen, R.M. Wang, G.Z. Shen, Fiber-based flexible all-solid-state asymmetric supercapacitors for integrated photodetecting system. Angew. Chem. Int. Ed. 53(7), 1849-1853 (2014). https://doi.org/10.1002/anie.201307581
[14] X.H. Cao, Z.Y. Yin, H. Zhang, Three-dimensional graphene materials: Preparation, structures and application in supercapacitors. Energy Environ. Sci. 7(6), 1850-1865 (2014). https://doi.org/ 10.1039/C4ee00050a
[15] V.L. Pushparaj, M.M. Shaijumon, A. Kumar, S. Murugesan, L. Ci, R. Vajtai, R.J. Linhardt, O. Nalamasu, P.M. Ajayan, Flexible energy storage devices based on nanocomposite paper. PNAS 104(34), 13574-13577 (2007). https://doi.org/10.1073/pnas.0706508104
[16] H. Kim, J.H. Ahn, Graphene for flexible and wearable device applications. Carbon 120, 244-257 (2017). https://doi.org/10.1016/j.carbon.2017.05.041
[17] Y. Huang, J.Y. Tao, W.J. Meng, M.S. Zhu, Y. Huang, Y.Q. Fu, Y.H. Gao, C.Y. Zhi, Super-high rate stretchable polypyrrole-based supercapacitors with excellent cycling stability. Nano Energy 11, 518-525 (2015). https://doi.org/10.1016/j.nanoen.2014.10.031
[18] Y. Huang, H. Hu, Y. Huang, M.S. Zhu, W.J. Meng, C. Liu, Z.X. Pei, C.L. Hao, Z.K. Wang, C.Y. Zhi, From industrially weavable and knittable highly conductive yarns to large wearable energy storage textiles. ACS Nano 9(5), 4766-4775 (2015). https://doi.org/10.1021/acsnano.5b00860
[19] Y. Huang, Y. Huang, W.J. Meng, M.S. Zhu, H.T. Xue, C.S. Lee, C.Y. Zhi, Enhanced tolerance to stretch-induced performance degradation of stretchable MnO2-based supercapacitors. ACS Appl. Mater. Interfaces 7(4), 2569-2574 (2015). https://doi.org/10.1021/Am507588p
[20] Y. Huang, M. Zhong, Y. Huang, M.S. Zhu, Z.X. Pei, Z.F. Wang, Q. Xue, X.M. Xie, C.Y. Zhi, A self-healable and highly stretchable supercapacitor based on a dual crosslinked polyelectrolyte. Nat. Commun. 6, 10310 (2015). https://doi.org/10.1038/Ncomms10310
[21] Y. Huang, M.S. Zhu, Z.X. Pei, Y. Huang, H.Y. Geng, C.Y. Zhi, Extremely stable polypyrrole achieved via molecular ordering for highly flexible supercapacitors. ACS Appl. Mater. Interfaces 8(3), 2435-2440 (2016). https://doi.org/10.1021/acsami.5b11815
[22] B.B. Yue, C.Y. Wang, X. Ding, G.G. Wallace, Polypyrrole coated nylon lycra fabric as stretchable electrode for supercapacitor applications. Electrochim. Acta 68, 18-24 (2012). https://doi.org/ 10.1016/j.electacta.2012.01.109
[23] T. Liu, L. Finn, M. Yu, H. Wang, T. Zhai, X. Lu, Y. Tong, Y. Li, Polyaniline and polypyrrole pseudocapacitor electrodes with excellent cycling stability. Nano Lett. 14(5), 2522-2527 (2014). https://doi.org/10.1021/nl500255v
[24] H. Fu, Z.J. Du, W. Zou, H.Q. Li, C. Zhang, Carbon nanotube reinforced polypyrrole nanowire network as a high-performance supercapacitor electrode. J. Mater. Chem. A 1(47), 14943-14950 (2013). https://doi.org/10.1039/C3ta12844j
[25] D. Zhang, Q.Q. Dong, X. Wang, W. Yan, W. Deng, L.Y. Shi, Preparation of a three-dimensional ordered macroporous carbon nanotube/polypyrrole composite for supercapacitors and diffusion modeling. J. Phys. Chem. C 117(40), 20446-20455 (2013). https://doi.org/10.1021/Jp405850w
[26] H.P. de Oliveira, S.A. Sydlik, T.M. Swager, Supercapacitors from free-standing polypyrrole/graphene nanocomposites. J. Phys. Chem. C 117(20), 10270-10276 (2013). https://doi.org/ 10.1021/Jp400344u
[27] S. Biswas, L.T. Drzal, Multi layered nanoarchitecture of graphene nanosheets and polypyrrole nanowires for high performance supercapacitor electrodes. Chem. Mater. 22(20), 5667-5671 (2010). https://doi.org/10.1021/Cm101132g
[28] Y. Huang, Y. Huang, M.S. Zhu, W.J. Meng, Z.X. Pei, C. Liu, H. Hu, C.Y. Zhi, Magnetic-assisted, self-healable, yarn-based supercapacitor. ACS Nano 9(6), 6242-6251 (2015). https://doi.org/10.1021/acsnano.5b01602

Citation Information

Yan Huang, Zijie Tang, Zhuoxin Liu, Jun Wei, Hong Hu, Chunyi Zhi, Towards Enhancing Wearability and Fashion of Wearable Supercapacitor with Modified Polyurethane Artificial Leather Electrolyte. Nano-Micro Lett.(2018) 10: 38. https://doi.org/10.1007/s40820-018-0191-7

History

Received: 23 November 2017 / Accepted: 17 January 2018


Additional Info

  • Type of Publishing: JOUR - Journal
  • Title: Towards Enhancing Wearability and Fashion of Wearable Supercapacitor with Modified Polyurethane Artificial Leather Electrolyte
  • Author: Yan Huang, Zijie Tang, Zhuoxin Liu, Jun Wei, Hong Hu, Chunyi Zhi
  • Year: 2018
  • Volume: 10
  • Issue: 3
  • Journal Name: Nano-Micro Letters
  • ISSN: 2150-5551
  • URL: http://dx.doi.org/10.1007/s40820-018-0191-7
  • Abstract: Inspired by the sophisticated artificial leather garment industry and towards enhancing wearability of energy storage devices, we demonstrate a polyurethane artificial leather supercapacitor with large sheet electrodes embedded in the leather layer simultaneously working as a polyelectrolyte. This design totally reserves textiles underneath and thus addresses the well-known challenge of wearing comfortability. It provides a revolutionary configuration of wearable supercapacitors-the artificial leather on garment is also a supercapacitor. Unlike the polyvinyl alcohol-based acidic electrolytes, which are widely used, sodium chloride is used to modify the intrinsically fluorescent polyurethane leather for ionic transportation, which has no harm to human. The fluorescent leather supercapacitor is easily transferrable from any arbitrary substrates to form various patterns, enabling multifunctionalities of practical wearability, fashion and energy storage.
  • Publish Date: Wednesday, 17 January 2018
  • Start Page: 38
  • DOI: 10.1007/s40820-018-0191-7