Analysis of the surface layer on a petroleum coke electrode in tetraglyme solutions of lithium salts

The surface layer on a petroleum coke in tetraglyme solutions of LiAsF 6 or LiCF 3SO 3 was analysed with X-ray Photoelectron Spectroscopy, Scanning Electron Microscopy, Gas Chromatography and fluoride selective electrode. Results indicate that solvent reduction is a minor process and salt reduction...

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Bibliographic Details
Published in:Electrochimica acta 2001, Vol.46 (5), p.691-700
Main Authors: Laik, B., Chausse, A., Messina, R., Barthes-Labrousse, M.G., Nedelec, J.Y., Le Paven-Thivet, C., Grillon, F.
Format: Article
Language:English
Subjects:
LiAsF 6
LiCF 3SO 3
Petroleum coke
Surface layer composition
Tetraglyme
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Summary:The surface layer on a petroleum coke in tetraglyme solutions of LiAsF 6 or LiCF 3SO 3 was analysed with X-ray Photoelectron Spectroscopy, Scanning Electron Microscopy, Gas Chromatography and fluoride selective electrode. Results indicate that solvent reduction is a minor process and salt reduction a major one. Results are consistent with the reduction mechanism of LiAsF 6 proposed in the literature. But with LiCF 3SO 3, we suggest that reduction proceeds via the cleavage of a CF bond instead of a CS bond.
ISSN:0013-4686
1873-3859
DOI:10.1016/S0013-4686(00)00651-4