Influence of mechanical strain on the electrochemical lithiation of aluminum-based electrode materials

Tetsu Ichitsubo, Shunsuke Yagi, Takayuki Doi, Shunsuke Yukitani, Kosuke Hirai, Eiichiro Matsubara

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

While an Al-Li alloy is expected to be useful as an active material for a negative electrode in a Li battery, the electrochemical lithiation of pure Al metal is known to be quite difficult. In this work, we sought to clarify why an Al electrode hardly absorbs Li from a pure Al state, from the viewpoint of elasticity theory and thermodynamics. We consider two cases: (i) an AlLi compound with elastic strain due to volume expansion is formed in the Al matrix, and (ii) Li ions are absorbed into an Al electrode that has been pre-strained by rolling. These strain-energy effects are discussed with the aid of a chemical-potential diagram and the Gibbs-Duhem equation.

Original languageEnglish
Pages (from-to)A14-A17
JournalJournal of the Electrochemical Society
Volume159
Issue number1
DOIs
Publication statusPublished - 2012 Feb 29
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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