Coating of graphite anode with coal tar pitch as an effective precursor for enhancing the rate performance in Li-ion batteries: Effects of composition and softening points of coal tar pitch

Yu Jin Han, Jandee Kim, Jae Seong Yeo, Jung Chul An, Ik Pyo Hong, Koji Nakabayashi, Jin Miyawaki, Jin Do Jung, Seong Ho Yoon

研究成果: Contribution to journalArticle査読

72 被引用数 (Scopus)

抄録

Effects of compositions and softening points of coal tar pitches (CTPs) on the electrochemical performances especially for first cycle Coulombic efficiency and rate performance, of the amorphous carbon coating on the graphite surface were closely examined. CTPs with higher softening points could afford the better homogeneous amorphous carbon coating on the graphite surface, resulting in the better enhancing rate performance of graphite anode without decreasing the first cycle Coulombic efficiency. CTP with almost complete absence of hexane soluble (HS) fraction always showed the good enhancing effect of the rate performance. HS fraction of CTP, which is a reason for inducing surface defects on the coated carbon, hindered the enhancing effect of electrochemical performances. CTP derived amorphous carbon coating could effectively decrease charge transfer resistance on the graphite electrode-electrolyte interface.

本文言語英語
ページ(範囲)432-438
ページ数7
ジャーナルCarbon
94
DOI
出版ステータス出版済み - 8 29 2015

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 材料科学(全般)

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