In Situ Assessment of LiMn2O4 Degradation during Prolonged Exposure in Carbonate-Based Electrolytes

Mohamed Mohamedi, Naomi Anzue, Kaoru Dokko, Takashi Itoh, Isamu Uchida

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The degradations of thin-film LiMn2O4 electrodes during prolonged exposure to 1 M LiPF6/EC-DMC at room temperature and 55°C, were assessed by in situ Raman spectroscopy. Our results demonstrate that different deterioration mechanisms of the spinel were found depending on the temperature. Exposure of a thin-film spinel LiMn 2O4 electrode to LiPF6/EC-DMC electrolyte at room temperature and 55°C led to spontaneous formation of a thin insulating surface layer. This process is accompanied by the transformation of the LiMn2O4 electrode surface into λ-MnO2 and Mn2O3 at room temperature and 55°C, respectively.

Original languageEnglish
Pages (from-to)1168-1171
Number of pages4
JournalElectrochemistry
Volume71
Issue number12
DOIs
Publication statusPublished - 2003 Dec

Keywords

  • Carbonate-Based Electrolytes
  • Degradation
  • Elevated Temperatures
  • Lithium Manganese Oxide

ASJC Scopus subject areas

  • Electrochemistry

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