Phase transition in the spinel Li4Ti5O12 induced by lithium insertion - Influence of the substitutions Ti/V, Ti/Mn, Ti/Fe

Pierre Kubiak, Aurélie Garcia, Manfred Womes, Laurent Aldon, Josette Olivier-Fourcade, Pierre Emmanuel Lippens, Jean Claude Jumas

Research output: Contribution to journalConference article

138 Citations (Scopus)

Abstract

The spinel Li4Ti5O12, a stable phase of the Li2O-TiO2 system, allows to insert three Li atoms per formula unit at a potential of 1.5V on the basis of a spinel ↔ NaCl phase transition. This mechanism leads to a reduction of three Ti(IV) atoms out of five, corresponding to a theoretical capacity of 175mAh/g. The influence of structural defaults on the spinel → NaCl phase transition and its reversibility during charge/discharge cycles have been studied. Solid solutions formed from chemical insertion of lithium or substitutions Ti/V, Ti/Mn, Ti/Fe modify the cation distribution on the crystallographic sites (tetrahedral 8a, octahedral 16d, space group Fd3m) and influence the electrochemical performances. A structural analysis by X-ray and neutron diffraction, X-ray absorption, 57Fe Mössbauer spectroscopy and first principle calculations have allowed to establish a relationship between the structure and the electrochemical properties.

Original languageEnglish
Pages (from-to)626-630
Number of pages5
JournalJournal of Power Sources
Volume119-121
DOIs
Publication statusPublished - 1 Jun 2003
EventSelected Papers Presented at the 11th IMLB - Monterey, CA, United States
Duration: 22 Jun 200228 Jun 2002

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Keywords

  • Anode
  • Fe Mössbauer data
  • Insertion mechanisms
  • Li-ion batteries
  • LiTiO

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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