Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 2707-2717 |
| Number of pages | 11 |
| Journal | Electrochimica Acta |
| Volume | 42 |
| Issue number | 17 |
| Publication status | Published - 1997 |
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Keywords
- Graphite intercalation compounds
- Hydrogen
- Lithium
- Molecular orbital methods
ASJC Scopus subject areas
- Chemical Engineering(all)
- Analytical Chemistry
- Electrochemistry
Cite this
On the possibility of hydrogen intercalation of graphite-like carbon materials - Electrochemical and molecular orbital studies. / Watanabe, Mikio; Tachikawa, Masanori; Osaka, Tetsuya.
In: Electrochimica Acta, Vol. 42, No. 17, 1997, p. 2707-2717.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - On the possibility of hydrogen intercalation of graphite-like carbon materials - Electrochemical and molecular orbital studies
AU - Watanabe, Mikio
AU - Tachikawa, Masanori
AU - Osaka, Tetsuya
PY - 1997
Y1 - 1997
N2 - 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.
AB - 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.
KW - Graphite intercalation compounds
KW - Hydrogen
KW - Lithium
KW - Molecular orbital methods
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UR - http://www.scopus.com/inward/citedby.url?scp=0030674708&partnerID=8YFLogxK
M3 - Article
VL - 42
SP - 2707
EP - 2717
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
IS - 17
ER -