Cathode properties of FeF3–V2O5 Glass/C for lithium-ion batteries

Ayuko Kitajou, Masahiro Hokazono, Noboru Taguchi, Shingo Tanaka, Shigeto Okada

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

For large storage batteries, cost performance is more important than energy density. Iron-based conversion-type cathode active materials are promising because this material group satisfies both low-cost and high-capacity requirements. In particular, iron fluoride is notable for its relatively high discharge voltage. However, the electronic conductivity of FeF3 is poor and it has large discharge-charge overvoltage. To solve these issues, xFeF3-V2O5/C (9xFeF3-9V2O5–P2O5) was investigated and the composition with x = 2 was shown to be optimal. Furthermore, the cyclability of 2FeF3–V2O5/C was improved by changing the salt from LiPF6 to LiClO4 and changing the solvent from DMC to EMC. Although the V2O5 glass component showed irreversible capacity due to Li trapping in the glass matrix at the first cycle, the irreversible capacity at the first cycle was successfully compensated by the addition of LiF as a sacrificial salt.

本文言語英語
論文番号157449
ジャーナルJournal of Alloys and Compounds
856
DOI
出版ステータス出版済み - 3 5 2021

All Science Journal Classification (ASJC) codes

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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