Chemical doping of a core-shell silicon nanoparticles@polyaniline nanocomposite for the performance enhancement of a lithium ion battery anode

Heng Yi Lin, Cheng Hung Li, Di Yan Wang, Chia Chun Chen

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

New silicon based anodic materials in lithium ion batteries (Si-based LIBs) have been developed worldwide to overcome capacity decay during the lithiation/delithiation process. In this study, a composite of Si nanoparticles coated with 5-sulfoisophthalic acid (SPA) doped polyaniline (core/shell SiNPs@PANi/SPA) was prepared and applied as an anode material for LIB applications. The detailed structure of the core/shell SiNPs@PANi/SPA composite was characterized using high-resolution scanning electron microscopy before and after charging/discharging. The electrochemical measurements showed that the SiNPs@PANi/SPA anode exhibited a high capacity of 925 mA h g-1 and high coulombic efficiency (99.6%) after long-term cycling (1000 cycles). Overall results indicated that the SPA doped polyaniline served as a conductive matrix to improve electrical contact and to provide an adhesive force in Si-based LIBs. Our approach opens a route for the design of efficient silicon nanocomposites for LIB applications.

Original languageEnglish
Pages (from-to)1280-1287
Number of pages8
JournalNanoscale
Volume8
Issue number3
DOIs
Publication statusPublished - 2016 Jan 21
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)

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