title: Chemical doping of a core-shell silicon nanoparticles@polyaniline nanocomposite for the performance enhancement of a lithium ion battery anode.
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.
authors.affiliation: Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan. diyan.wang@ntnu.edu.tw cjchen@ntnu.edu.tw.
authors.forename: Heng-Yi
authors.initials: HY
authors.lastname: Lin
authors.affiliation: Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan. diyan.wang@ntnu.edu.tw cjchen@ntnu.edu.tw.
authors.forename: Cheng-Hung
authors.initials: CH
authors.lastname: Li
authors.affiliation: Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan. diyan.wang@ntnu.edu.tw cjchen@ntnu.edu.tw.
authors.forename: Di-Yan
authors.initials: DY
authors.lastname: Wang
authors.affiliation: Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan. diyan.wang@ntnu.edu.tw cjchen@ntnu.edu.tw and Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan.
authors.forename: Chia-Chun
authors.initials: CC
authors.lastname: Chen