In situ observation of LiNiO2 single-particle fracture during Li-Ion extraction and insertion

Kaoru Dokko, Matsuhiko Nishizawa, Soichi Horikoshi, Takashi Itoh, Mohamed Mohamedi, Isamu Uchida

Research output: Contribution to journalArticlepeer-review

73 Citations (Scopus)

Abstract

Electrochemical lithium-ion extraction/insertion properties of Li1-xNiO2 single particles were investigated by attaching a filament microelectrode to the particle in 1 mol/dm3 LiClO4/ethylene carbonate + propylene carbonate electrolyte. High-resolution cyclic voltammograms and galvanostatic chronopotentiograms were recorded. In addition, we observed in situ particle fracture during charge-discharge using an optical microscope equipped with a charge-coupled device camera. We found that the particle fractures when it is polarized above 4.2 V vs. Li/Li+. This phenomenon was explained by the change in crystal parameters expected to occur for x > 0.75 in Li1-xNiO2.

Original languageEnglish
Pages (from-to)125-127
Number of pages3
JournalElectrochemical and Solid-State Letters
Volume3
Issue number3
DOIs
Publication statusPublished - 2000 Mar 1

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

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