Synthesis and electrochemistry of new layered (1 - x)LiVO2·xLi2TiO3 (0 ≤ x ≤ 0.6) electrode materials

Lianqi Zhang, Kazunori Takada, Narumi Ohta, Minoru Osada, Takayoshi Sasaki

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Novel electrode materials with nominal compositions of (1 - x)LiVO2·xLi2TiO3 (0 ≤ x ≤ 0.6) were synthesized by carbothermal reduction reaction. All the materials were identified to have a layered structure and can be considered as a solid solution related to LiVO2-Li2TiO3 system, in which Li layers was alternately stacked with the layers made of mixture of Li, V, and Ti in a ccp array of oxygen. The redox reaction associated with vanadium ions was not reversible in LiVO2; however, introduction of the redox couple into Li2TiO3 made it much more reversible. A reversible capacity of about 120 mAh g-1 remained after 90 cycles for the samples with x = 0.5 and 0.6, when they were cycled in the voltage range of 1.0-4.8 V.

Original languageEnglish
Pages (from-to)1007-1011
Number of pages5
JournalJournal of Power Sources
Volume174
Issue number2
DOIs
Publication statusPublished - 2007 Dec 6
Externally publishedYes

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Keywords

  • (1 - x)LiVO·xLiTiO
  • Layered structure
  • Lithium rechargeable battery
  • Solid solutions

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry
  • Energy (miscellaneous)

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