A graphite functional layer covering the surface of LiMn2O 4 electrode to improve its electrochemical performance

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Jiexi Wang
  • Qiaobao Zhang
  • Xinhai Li
  • Zhixing Wang
  • Huajun Guo
  • Guochun Yan
  • Bin Huang
  • Zhenjiang He

Detail(s)

Original languageEnglish
Pages (from-to)6-9
Journal / PublicationElectrochemistry Communications
Volume36
Online published5 Sep 2013
Publication statusPublished - Nov 2013

Abstract

Here, we first report the introduction of sputtering a graphite layer covering the surface of the as-fabricated LiMn2O4 cathode to form a protective layer as a solution to solve the rapid capacity fading of LiMn2O4-based lithium ion battery at elevated temperature. Compared with the rapid capacity fading of the bare LiMn2O 4 cathode (LMO), the graphite layer modified cathode (G-LMO) possesses excellent cyclic performance at 55 C. It maintains 92% of initial discharge capacity even after 500 cycles at 1C. TEM images show that the surface of the bare LiMn2O4 particles in LMO sample is damaged while G-LMO withstands Mn leaching induced by HF corrosion under the protection of graphite layer. © 2013 Elsevier B.V.

Research Area(s)

  • Elevated-temperature performance, Graphite layer, LiMn2O4, Sputtering

Citation Format(s)

A graphite functional layer covering the surface of LiMn2O 4 electrode to improve its electrochemical performance. / Wang, Jiexi; Zhang, Qiaobao; Li, Xinhai; Wang, Zhixing; Zhang, Kaili; Guo, Huajun; Yan, Guochun; Huang, Bin; He, Zhenjiang.

In: Electrochemistry Communications, Vol. 36, 11.2013, p. 6-9.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review