A stress-control charging method with multi-stage currents for silicon-based lithium-ion batteries: Theoretical analysis and experimental validation

Kai Zhang, Junwu Zhou, Fuhao Yang, Yuwei Zhang, Yihui Pan, Bailin Zheng, Yong Li, Fuqian Yang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Controlling mechanical stress in silicon-based anode has been proved to be an effective method in improving the cycling performance of silicon-based lithium-ion battery. This work is aimed at developing stress-control charging strategies from the stress analysis of a silicon particle. Using a mechanochemical model coupled with the free volume theory, we analyze the stress evolution in a silicon particle with multi-stage current strategies for a small charging rate (C-rate) at a low SOC and a large C-rate at a high SOC. The calculation results support the proposed strategies in reducing the stresses in the silicon particle. We perform experimental tests, including cycling test and SEM (scanning electron microscopy) analysis, and demonstrate the feasibility of the proposed strategies. Using multi-stage currents for lithiation and a constant current for delithiation can have a conspicuous effect on improving the cycling performance of silicon-based lithium-ion batteries.

Original languageEnglish
Article number105985
JournalJournal of Energy Storage
Volume56
DOIs
StatePublished - Dec 1 2022

Bibliographical note

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Charging strategy
  • Lithium-ion battery
  • Silicon anode
  • Stress analysis

ASJC Scopus subject areas

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

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