Electrochemical characterization, structural evolution, and thermal stability of livopo4 over multiple lithium intercalations

Akinobu Nojima, Atsushi Sano, Hiroki Kitamura, Shigeto Okada

Research output: Contribution to journalArticle

Abstract

α1-LiVOPO4, β-LiVOPO4, and α-LiVOPO4 are known as multiple lithium intercalation cathode materials. They were characterized by means of half-cell performance, operando X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), and differential scanning calorimetry (DSC). The operando XRD revealed differences in crystal structure evolution during charging/ discharging among the three crystal phases. Although the charge/discharge profiles and the crystal structure evolution behaviors were the same among the three crystal phases in the range of 3.5-4.5 V, the profiles and behaviors differed completely in the range of 1.0-3.5 V. The thermal stability of each phase of LiVOPO4 is similar to that of LiFePO4 in the fully charged state from the results of the DSC profiles.

Original languageEnglish
Pages (from-to)267-274
Number of pages8
JournalEvergreen
Volume6
Issue number4
DOIs
Publication statusPublished - Dec 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Surfaces, Coatings and Films
  • Management, Monitoring, Policy and Law

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