The Origin of the residual carbon in lifepo4 synthesized by wet milling

Bin Sung Park, Kyoo Chang Park, Tae Jin Hwang, Il Won Cho, Ho Jang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This study reports the origin of the electrochemical improvement of LiFePO4 when synthesized by wet milling using acetone without conventional carbon coating. The wet milled LiFePO4delivers 149 mAhg-1 at 0.1 C, which is comparable to carbon coated LiFePO 4and approximately 74% higher than that of dry milled LiFePO 4, suggesting that the wet milling process can increase the capacity in addition to conventional carbon coating methods. UV spectroscopy, elemental microanalysis, and evolved gas analysis are used to find the root cause of the capacity improvement during the mechanochemical reaction in acetone. The analytical results show that the improvement is attributed to the conductive residual carbon on the surface of the wet milled LiFePO4particles, which is produced by the reaction of FeC2O4. 2H 2O with acetone during wet milling through oxygen deficiency in theprecursor.

Original languageEnglish
Pages (from-to)536-540
Number of pages5
JournalBulletin of the Korean Chemical Society
Issue number2
Publication statusPublished - 2011 Feb 20


  • Carbon coating
  • Lithium iron phosphate
  • Mechanochemical reaction
  • Rate capability
  • Wet milling

ASJC Scopus subject areas

  • General Chemistry


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