On the possibility of hydrogen intercalation of graphite-like carbon materials - Electrochemical and molecular orbital studies

Mikio Watanabe, Masanori Tachikawa, Tetsuya Osaka*

*この研究の対応する著者

研究成果: Article査読

15 被引用数 (Scopus)

抄録

Graphite-like carbon materials were investigated to learn whether they form hydrogen-graphite intercalation compounds (H-GICs), which would be useful as hydrogen storage materials in rechargeable batteries. The ability of graphite-like materials to absorb hydrogen was examined with cyclic voltammetry (CV) and constant-current charge and discharge tests in 6 mol dm-3 KOH. It was concluded that H-GICs did not form under our experimental conditions. In order to understand the difference between hydrogen and lithium ions in ability to form the intercalation compounds with graphite-like carbon materials, molecular orbital analyses were carried out. The results demonstrate that lithium-graphite intercalation compounds (Li-GICs) are stable because of the presence of lithium 2p-orbitals, whereas such stable graphite intercalation compounds do not form with hydrogen ions because no three-dimensional p-orbitals are available.

本文言語English
ページ(範囲)2707-2717
ページ数11
ジャーナルElectrochimica Acta
42
17
DOI
出版ステータスPublished - 1997

ASJC Scopus subject areas

  • 化学工学(全般)
  • 電気化学

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