• 文献标题:   Synthesis of LiFePO4/graphene microspheres while avoiding restacking of graphene sheet's for high-rate lithium-ion batteries
  • 文献类型:   Article
  • 作  者:   KIM MS, LEE GW, LEE SW, JEONG JH, MHAMANE D, ROH KC, KIM KB
  • 作者关键词:   graphene based composite, restacking of graphene, highrate lithium ion batterie, high performance cathode material, energy efficiency
  • 出版物名称:   JOURNAL OF INDUSTRIAL ENGINEERING CHEMISTRY
  • ISSN:   1226-086X EI 1876-794X
  • 通讯作者地址:   Yonsei Univ
  • 被引频次:   15
  • DOI:   10.1016/j.jiec.2017.03.054
  • 出版年:   2017

▎ 摘  要

LiFePO4/graphene microspheres are synthesized while avoiding the restacking of graphene sheets using a spray-drying process and a subsequent heat treatment. To determine an optimal condition for preventing the restacking of graphene sheets in the composites, we control the weight ratio of LiFePO4 to rGO. When the amount of rGO in the composite exceeds a specific amount, the rGO sheets are spontaneously restacked. The restacked rGO sheets impede the Li ion movement, which is leading to the deterioration of the electrochemical performance at high C-rates. The microspheres synthesized exhibit a high specific capacity, excellent rate capability, and good cycling stability. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.