Facile preparation of silicon/carbon composite with porous architecture for advanced lithium-ion battery anode

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Haofeng Shi
  • Wenyuan Zhang
  • Donghua Wang
  • Jiashuai Wang
  • Chengdeng Wang
  • Zhihao Xiong
  • Hailiang Dong
  • Bingshe Xu
  • Xiaoqin Yan

Detail(s)

Original languageEnglish
Article number117427
Journal / PublicationJournal of Electroanalytical Chemistry
Volume937
Online published6 Apr 2023
Publication statusPublished - 15 May 2023

Abstract

Silicon is a potential anode material for Li battery due to its high theoretical specific capacity (4200 mAh g−1). However, Si is hampered for practical application in Li-battery due to its enormous volume alternation causing instability. Herein, we demonstrated a novel carbon-coated porous structure (C@void/Si-G) synthesized by uniformly wrapping Si into pitch pyrolytic carbon shells and then in-situ removing the sodium chloride template can overcome the bottleneck. It is worth noting that our process for C@void/Si-G also offers a simple route for cost down and mass production of anode material. The C@void/Si-G anodes exhibit an excellent capacity of 1082.7 mAh g−1 at 0.2 C after 200 cycles. Furthermore, it holds a high capacity retention of 81.9 % after 500 cycles at 0.5 C. We found that C@void/Si-G composite only rises about 41% volumetric expansion during 500 operation cycles. This can effectively avoid direct contact between silicon and electrolyte to form a stable solid electrolyte interphase (SEI) film. Especially, practical application of the C@void/Si-G anode is demonstrated in a full cell pairing with LiNi0.3Co0.3Mn0.3O2 cathode. The full cell presents great cycle retention of 90.1 % at 0.2 C after 100 cycles and a high energy density (446 Wh kg−1). © 2023 Elsevier B.V.

Research Area(s)

  • Ball milling, Carbon, Lithium-ion batteries, Porous structure, Silicon-based anode

Citation Format(s)

Facile preparation of silicon/carbon composite with porous architecture for advanced lithium-ion battery anode. / Shi, Haofeng; Zhang, Wenyuan; Wang, Donghua et al.
In: Journal of Electroanalytical Chemistry, Vol. 937, 117427, 15.05.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review