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Author:

Li, Weitian (Li, Weitian.) | Guo, Xianwei (Guo, Xianwei.) | Lu, Yue (Lu, Yue.) (Scholars:卢岳) | Wang, Lin (Wang, Lin.) | Fan, Ailing (Fan, Ailing.) | Sui, Manling (Sui, Manling.) (Scholars:隋曼龄) | Yu, Haijun (Yu, Haijun.) (Scholars:尉海军)

Indexed by:

EI Scopus SCIE

Abstract:

Silicon is a promising alternative anode material for high-performance lithium ion batteries (LIBs) because of its high specific capacity. However, the practical application is still hampered by poor cycle and rate performance because of the tremendous volume expansions/contractions during the lithium ions insertions/extractions. Here we report a hierarchically porous silicon anode consisting of uniformly dispersed nanoparticles with amorphous structure that has been electrodeposited successfully on the copper foil and been utilized directly for LIBs. The typical size of silicon particle is similar to 100-200 nm, which is beneficial for the fast lithium ions diffusion in a short distance. The hierarchical pores with interconnect channels are easy for the electrolyte filling and ions transports, and can offer sufficient space for the volume expansions of silicon anode during lithium ions insertions. Furthermore, the amorphous feature of the silicon nanoparticles can effectively release the stress from the lithiation-induced large volume expansions and enhance the structure stability, which are beneficial for the long cycling lifetime. Combing the highly conductive copper substrate, the free-standing silicon anode shows high reversible capacity of 1200 mA/g, excellent cycling stability (similar to 1000 mAh/g for 230 cycles) and outstanding rate performance (1000 and 600 mAh/g at 300 and 2000 mA/g, respectively). This study may pave a new way to develop silicon/copper composite materials as binder-free anodes for high-performance LIBs.

Keyword:

Lithium ion battery Silicon anode Electrodeposition Hierarchically porous structure Amorphous

Author Community:

  • [ 1 ] [Li, Weitian]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Guo, Xianwei]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Wang, Lin]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Fan, Ailing]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Yu, Haijun]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Lu, Yue]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China
  • [ 7 ] [Sui, Manling]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China

Reprint Author's Address:

  • 尉海军

    [Yu, Haijun]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

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Source :

ENERGY STORAGE MATERIALS

ISSN: 2405-8297

Year: 2017

Volume: 7

Page: 203-208

2 0 . 4 0 0

JCR@2022

Cited Count:

WoS CC Cited Count: 42

SCOPUS Cited Count: 42

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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