Structure and electrochemical properties of Zn-doped Li4 Ti 5O12 as anode materials in li-ion battery

Biao Zhang, Hongda Du, Baohua Li, Feiyu Kang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

64 Citations (Scopus)

Abstract

Zinc-doped lithium titanates with the formula of Li4-xZn xTi5O12 (x=0, 0.25, 0.5, 1) were synthesized as anode materials via a solid-state reaction. The phase composition does not change by Zn doping when x<1 but results in the increase in the relative peak intensity ratio of I(311)/I(111) and I (400)/I(111) in X-ray diffraction. The conductivity is improved by Zn doping via the generation of mixing Ti4+/Ti 3+. The specific capacity at 0.5C decreases by Zn doping, which is ascribed to the location of Zn2+ at the 8a site; however, the capacity retention is improved remarkably compared to that of the undoped one when discharged at a high rate.
Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume13
Issue number4
DOIs
Publication statusPublished - 22 Feb 2010
Externally publishedYes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering
  • Electrochemistry

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