Theoretical study on stability of lithium ion battery in charging process: Analysis based on partial charge and partial energy

Yusuke Yamauchi, Hiromi Nakai

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The stability of the lithium ion battery (LIB) using LiCoO2 as a cathode material in charging/discharging process was investigated on the basis of the first-principles density functional theory calculations. The voltage curve obtained by total electronic energy reproduced the trend of the experimental data such as the instability of the battery at the charged state. Mulliken's population analysis (MPA) and energy density analysis (EDA) techniques were utilized to estimate the partial charge and partial energy in LixCoO2 species. During charging/discharging, Mulliken charge of oxygen changes and, therefore, its local energy varies. On the other hand, the local energy of cobalt drastically changes at low lithium content, whereas its Mulliken charge approximately remains constant. The present results indicate that the local analysis is essential to clarify the origin of the stability of LIB.

Original languageEnglish
Pages (from-to)A1364-A1368
JournalJournal of the Electrochemical Society
Volume160
Issue number9
DOIs
Publication statusPublished - 2013 Aug 20

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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