Sinusoidal current and stress evolutions in lithium-ion batteries

Xiaoguang Yang, Christoph Bauer, Chao-yang Wang

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Mechanical breakdown of graphite materials due to diffusion-induced stress (DIS) is a key aging mechanism of lithium-ion batteries. In this work, electrochemical-thermal coupled model along with a DIS model is developed to study the DIS distribution across the anode thickness. Special attention is paid to the evolution behavior of surface tangential stress (STS) in the discharge process for graphite at different locations of the anode. For the first time, we report that the evolution of STS, as well as local current, at all locations of the anode, evolve like sinusoidal waves in the discharge process with several crests and troughs. The staging behavior of graphite active material, in particular the sharp change of open-circuit potential (OCP) of graphite in the region between two plateaus, is found to be the root cause for the sinusoidal patterns of current and stress evolution. Furthermore, the effects of various parameters, such as starting state of charge, discharge C-rate and electrode thickness on the current and stress evolutions are investigated.

Original languageEnglish (US)
Pages (from-to)414-422
Number of pages9
JournalJournal of Power Sources
Volume327
DOIs
StatePublished - Sep 30 2016

Fingerprint

electric batteries
Graphite
lithium
graphite
Anodes
ions
anodes
troughs
stress distribution
Lithium-ion batteries
Stress concentration
plateaus
Aging of materials
breakdown
Electrodes
electrodes
Networks (circuits)
causes

All Science Journal Classification (ASJC) codes

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

Cite this

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Sinusoidal current and stress evolutions in lithium-ion batteries. / Yang, Xiaoguang; Bauer, Christoph; Wang, Chao-yang.

In: Journal of Power Sources, Vol. 327, 30.09.2016, p. 414-422.

Research output: Contribution to journalArticle

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AU - Bauer, Christoph

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