Interfacial modification for high-power solid-state lithium batteries

Kazunori Takada, Narumi Ohta, Lianqi Zhang, Katsutoshi Fukuda, Isao Sakaguchi, Renzhi Ma, Minoru Osada, Takayoshi Sasaki

Research output: Contribution to journalArticlepeer-review

179 Citations (Scopus)

Abstract

Interfaces between LiCoO2 and sulfide solid electrolytes were modified in order to enhance the high-rate capability of solid-state lithium batteries. Thin films of oxide solid electrolytes, Li4Ti5O12, LiNbO3, and LiTaO3, were interposed at the interfaces as buffer layers. Changes in the high-rate performance upon heat treatment revealed that the buffer layer should be formed at low temperature to avoid thermal diffusion of the elements. Buffer layers of LiNbO3 and LiTaO3 can be formed at low temperature for the interfacial modification, because they show high ionic conduction in their amorphous states, and so are more effective than Li4Ti5O12 for high-power densities.

Original languageEnglish
Pages (from-to)1333-1337
Number of pages5
JournalSolid State Ionics
Volume179
Issue number27-32
DOIs
Publication statusPublished - 2008 Sep 30
Externally publishedYes

Keywords

  • LiTaO
  • Lithium battery
  • Nanoionics
  • Solid electrolyte
  • Space-charge layer

ASJC Scopus subject areas

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

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