Improving the cyclability of silicon anodes for lithium-ion batteries using a simple pre-lithiation method

K. H. Kim, J. Shon, H. Jeong, H. Park, S. J. Lim, J. S. Heo

Research output: Contribution to journalArticle

Abstract

Despite intense studies into silicon anode materials, the large volume expansion of silicon remains a significant problem that reduces battery performance and shortens battery life. In this paper, a procedure to increase the cycle life of the silicon anode in full-cell configuration using a simple pre-lithiation method is proposed. By precisely controlling the thickness of the pre-deposited lithium through evaporation, the volume change of the silicon-containing anodes can be effectively reduced during discharge. A coin-cell fabricated with a high-capacity cathode and the pre-lithiated silicon–graphite anode shows improvements in cycling performance, as well as a higher discharge capacity. Electrochemical and microscopic analysis confirm that pre-lithiation successfully suppresses the volumetric changes. Thus, this work provides an effective method for the preparation of long-cycle-life Li-ion batteries containing silicon-based anodes.

Original languageEnglish
Article number228066
JournalJournal of Power Sources
Volume459
DOIs
Publication statusPublished - 2020 May 31
Externally publishedYes

Keywords

  • Cycling performance
  • Lithium-ion batteries
  • Pre-lithiation
  • Silicon anode
  • Silicon-graphite

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this