Supercritical-hydrothermal accelerated solid state reaction route for synthesis of LiMn2O4cathode material for high-power Li-ion batteries

Xue Wu Liu, Jie Tang, Xu Song Qin, Yuan Fu Deng, Guohua Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

Synthesis of the spinel structure lithium manganese oxide (LiMn2O4) by supercritical hydrothermal (SH) accelerated solid state reaction (SSR) route was studied. The impacts of the reaction pressure, reaction temperature and reaction time of SH route, and the calcination temperature of SSR route on the purity, particle morphology and electrochemical properties of the prepared LiMn2O4materials were studied. The experimental results show that after 15 min reaction in SH route at 400 °C and 30 MPa, the reaction time of SSR could be significantly decreased, e.g. down to 3 h with the formation temperature of 800 °C, compared with the conventional solid state reaction method. The prepared LiMn2O4material exhibits good crystallinity, uniform size distribution and good electrochemical performance, and has an initial specific capacity of 120 mA·h/g at a rate of 0.1C (1C=148 mA/g) and a good rate capability at high rates, even up to 50C.
Original languageEnglish
Pages (from-to)1414-1424
Number of pages11
JournalTransactions of Nonferrous Metals Society of China (English Edition)
Volume24
Issue number5
DOIs
Publication statusPublished - 1 Jan 2014
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Geotechnical Engineering and Engineering Geology
  • Metals and Alloys
  • Materials Chemistry

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