C4F8 plasma treatment as an effective route for improving rate performance of natural/synthetic graphite anodes in lithium ion batteries

Choonghyeon Lee, Yu Jin Han, Young Deok Seo, Koji Nakabayashi, Jin Miyawaki, Ricardo Santamaría, Rosa Menéndez, Seong-Ho Yoon, Jyongsik Jang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Carbon-fluorine (CmFn) groups were selectively introduced on the surface of natural and synthetic graphites through plasma-fluorination using C4F8 vacuum plasma treatment. The type of carbon-fluorine bondings on the plasma-fluorinated graphite surface were selectively controlled by adjusting plasma processing time from 10 to 20 min. Systematic surface analyses revealed that the fluorine amount on the surface of plasma-fluorinated graphite was determined by the type of intrinsic structure and degree of graphitization of graphite. The electronegative semi-ionic carbon-fluorine groups on the graphite surface reduced the resistance related to lithium ion migration and charge transfer, leading to highest discharge capacity of 387 mA h/g at 1st cycle and discharge capacity of 293 mA h/g at high 10 C rate without deteriorating the 1st cycle Coulombic efficiency. This novel vacuum plasma treatment of introducing highly electronegative CmFn species on graphite can illuminate a new route of preparing superior lithium ion battery anode.

Original languageEnglish
Pages (from-to)28-35
Number of pages8
JournalCarbon
Volume103
DOIs
Publication statusPublished - Jul 1 2016

Fingerprint

Artificial graphite
Graphite
Fluorine
Anodes
Plasmas
Carbon
Vacuum
Plasma applications
Fluorination
Graphitization
Lithium
Charge transfer
Lithium-ion batteries
Ions

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

Cite this

C4F8 plasma treatment as an effective route for improving rate performance of natural/synthetic graphite anodes in lithium ion batteries. / Lee, Choonghyeon; Han, Yu Jin; Seo, Young Deok; Nakabayashi, Koji; Miyawaki, Jin; Santamaría, Ricardo; Menéndez, Rosa; Yoon, Seong-Ho; Jang, Jyongsik.

In: Carbon, Vol. 103, 01.07.2016, p. 28-35.

Research output: Contribution to journalArticle

Lee, Choonghyeon ; Han, Yu Jin ; Seo, Young Deok ; Nakabayashi, Koji ; Miyawaki, Jin ; Santamaría, Ricardo ; Menéndez, Rosa ; Yoon, Seong-Ho ; Jang, Jyongsik. / C4F8 plasma treatment as an effective route for improving rate performance of natural/synthetic graphite anodes in lithium ion batteries. In: Carbon. 2016 ; Vol. 103. pp. 28-35.
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AU - Miyawaki, Jin

AU - Santamaría, Ricardo

AU - Menéndez, Rosa

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