Synthesis of spinel LiMn2O4microspheres with durable high rate capability

Yu Bo Zhou, Yuan Fu Deng, Wei Hao Yuan, Zhi Cong Shi, Guohua Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Spinel LiMn2O4microspheres with durable high rate capability were synthesized by a facile route using spherical MnCO3precursors as the self-supported templates, combined with the calcinations of LiNO3at 700 °C for 8 h. The spherical MnCO3precursors were obtained from the control of the crystallizing process of Mn2+ions and NH4HCO3in aqueous solution. The effects of the mole ratio of the raw materials, reaction time, and reaction temperature on the morphology and yield of the MnCO3were investigated. The as-synthesized MnCO3and LiMn2O4microspheres were characterized by powder X-ray diffractometry (XRD) and scanning electron microscopy (SEM). Galvanostatic charge/discharge tests indicate that the spinel LiMn2O4microspheres deliver a discharge capacity of 90 mA·h/g at 10C rate show good capacity retention capability (75 of their initial capacity after 800 cycles at 10C rate). The durable high rate capability suggests that the as-synthesized LiMn2O4microspheres are promising cathode materials for high power lithium ion batteries.
Original languageEnglish
Pages (from-to)2541-2547
Number of pages7
JournalTransactions of Nonferrous Metals Society of China (English Edition)
Volume22
Issue number10
DOIs
Publication statusPublished - 1 Oct 2012
Externally publishedYes

Keywords

  • LiMn O microspheres 2 4
  • MnCO microspheres 3
  • rate capability
  • self-supported template

ASJC Scopus subject areas

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

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