Synthesis of LiFePO4/graphene microspheres while avoiding restacking of graphene sheet's for high-rate lithium-ion batteries

Myeong Seong Kim, Geon Woo Lee, Suk Woo Lee, Jun Hui Jeong, Dattakumar Mhamane, Kwang Chul Roh, Kwang Bum Kim

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)251-259
Number of pages9
JournalJournal of Industrial and Engineering Chemistry
Volume52
DOIs
Publication statusPublished - 2017 Aug 25

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

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