Comparison of the chemical stability of the high energy density cathodes of lithium-ion batteries

R. V. Chebiam, A. M. Kannan, F. Prado, A. Manthiram

Research output: Contribution to journalArticlepeer-review

118 Scopus citations

Abstract

With an objective to assess the chemical stabilities and their consequences in cell performance, the variations of oxygen content with lithium content (1-x) in chemically delithiated Li1-xCoO2, Li1-xNi0.85Co0.15O2, and Li1-xMn204 cathodes have been monitored with redox titrations. The Li1-xNi0.85Co0.15O2 system does not lose oxygen at least for (1-x) > 0.3. The chemical instability with a tendency to lose oxygen at deep lithium extraction could be the reason for the limited practical capacity of the Li1-xCoO2 system (140 mA h/g) compared to that realized with the Li1-xNi0.85Co0.15O2 system (180 mA h/g). The Li1-xMn2O4 spinel maintains an oxygen of 4.0 wihtout losing any oxygen for 0.15 ≤ (1-x) ≤.

Original languageEnglish (US)
Pages (from-to)624-627
Number of pages4
JournalElectrochemistry Communications
Volume3
Issue number11
DOIs
StatePublished - 2001
Externally publishedYes

Keywords

  • Chemical delithiation
  • Chemical stability
  • Lithium-ion battery
  • Positive electrodes

ASJC Scopus subject areas

  • Electrochemistry

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