Charge-discharge properties of surface-modified carbon by resin coating in Li-ion battery

J. S. Kim, W. Y. Yoon, Kwang Soo Yoo, G. S. Park, C. W. Lee, Y. Murakami, D. Shindo

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The effect of an epoxy resin coating on the electrochemical performance of Li-ion batteries is investigated. Mesocarbon microbeads (MCMB), which constitute a promising carbon anode material for rechargeable Li-ion batteries is used as a starting carbon material. The surface coating of the MCMB is carried out by refluxing in a dilute H2SO4 solution and mixing in the epoxy resin-dissolved tetrahydrofuran (THF) solution. After heat treatment at 1000-1300 °C, the resin coating layer on the MCMB is converted to an amorphous phase which is identified by means of a high resolution transmission electron microscope (HRTEM) and a electron energy loss spectroscopy (EELS) analyses. The Brunauer-Emmett-Teller (BET) surface area of MCMB is increased by the formation of the amorphous epoxy resin coating layer. The electrochemical performance of the MCMB, such as the charge-discharge capacity and cycleability, is enhanced by the surface modification through epoxy resin coating. The reasons for the improvement of electrochemical performance are discussed in terms of the results from HRTEM observation, EELS analysis, and cyclicvoltammetry.

Original languageEnglish
Pages (from-to)175-180
Number of pages6
JournalJournal of Power Sources
Volume104
Issue number2
DOIs
Publication statusPublished - 2002 Feb 15
Externally publishedYes

Keywords

  • Carbon electrode
  • Electrochemical reaction
  • Li-ion battery
  • Surface modification

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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