Nano-Micro Letters

Bi Nanoparticles Anchored in N-Doped Porous Carbon as Anode of High Energy Density Lithium Ion Battery

Yaotang Zhong1, Bin Li1, Shumin Li1, Shuyuan Xu1, Zhenghui Pan1, Qiming Huang1, 2, Lidan Xing1, 2, Chunsheng Wang3,*, Weishan Li1, 2,*

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Nano-Micro Lett. (2018) 10: 56

First Online: 10 May 2018 (Article)

DOI:10.1007/s40820-018-0209-1

*Corresponding author. E-mail: cswang@umd.edu ; liwsh@scnu.edu.cn

 

Abstract

 


Toc

A novel bismuth-carbon composite, in which bismuth nanoparticles were anchored in a nitrogen-doped carbon matrix (Bi@NC), is proposed as anode for high volumetric specific energy density lithium ion batteries (LIBs). Bi@NC composite was synthesized via carbonization of Zn-containing zeolitic imidazolate (ZIF-8) and replacement of Zn with Bi, resulting in the N-doped carbon that was hierarchically porous and anchored with Bi nanoparticles. The matrix provides a highly electronic conductive network that facilitates the lithiation/delithiation of Bi. Additionally, it restrains aggregation of Bi nanoparticles and serves as a buffer layer to alleviate the mechanical strain of Bi nanoparticles upon Li insertion/extraction. With these contributions, Bi@NC exhibits excellent cycling stability and rate capacity compared to bare Bi nanoparticles or their simple composites with carbon. This study provides a new approach for fabricating high volumetric energy density LIBs.


 

Keywords

Porous N-doped carbon; Bi nanoparticles; Anode; Lithium-ion battery; High energy density

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