The effect of carboxymethyl cellulose swelling on the stability of natural graphite particulates in an aqueous medium for lithium ion battery anodes

Jin Hyon Lee, Young Min Choi, Ungyu Paik, Jea Gun Park

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

The effect of carboxymethyl cellulose (CMC) swelling on the stability and chemical properties of a natural graphite suspension in an aqueous medium was investigated. Suspensions prepared at different pH were characterized according to swelling behavior, rheology, green microstructural observation, and measurement of the pore size. A correlation was found between dispersion stability and electrochemical performance. It was found that the swelling of CMC was a critical factor influencing the stability of graphite suspensions. This was evidenced by observations of the green microstructures and changes noted in sedimentation behaviors. Electrochemical experiments using a Li/organic electrolyte/natural graphite anode half-cell and 750 mAh-class lithium ion cells exhibited an initial discharge capacity above 340 mAh g-1 and an improved charge-discharge efficiency.

Original languageEnglish
Pages (from-to)657-660
Number of pages4
JournalJournal of Electroceramics
Volume17
Issue number2-4
DOIs
StatePublished - 2006 Dec 1

Keywords

  • Aqueous processing
  • Lithium ion battery
  • Natural graphite
  • Stability
  • Swelling behavior

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