Synthesis and electrochemistry of a vanadium-pillared manganese oxide

A new manganese dioxide pillared by vanadium oxide species has been synthesized hydrothermally from permanganate. It has the electrochemically active MnO 2 layer structure, which has been extensively studied as a battery cathode. The vanadium oxide ions, together with the water molecules, reside in...

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Bibliographic Details
Published in:Electrochemistry communications 2000-06, Vol.2 (6), p.445-447
Main Authors: Zhang, Fan, Ngala, Katana, Whittingham, M.Stanley
Format: Article
Language:English
Subjects:
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Hydrothermal synthesis
Lithium cathode
Manganese oxide
Pillars
Vanadium
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Summary:A new manganese dioxide pillared by vanadium oxide species has been synthesized hydrothermally from permanganate. It has the electrochemically active MnO 2 layer structure, which has been extensively studied as a battery cathode. The vanadium oxide ions, together with the water molecules, reside in between the oxide sheets; dehydration occurs without structural change. The (VO y ) 0.1MnO 2· nH 2O has a rhombohedral structure, with hexagonal parameters a=2.843(6) Å, c=22.08(2) Å. It reacts readily with lithium with a capacity around 150 mAh g −1; the pillar ions do not appear to impede reaction.
ISSN:1388-2481
1873-1902
DOI:10.1016/S1388-2481(00)00058-8