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Amorphous Vanadium Oxide/Carbon Composite Positive Electrode for Rechargeable Aluminum Battery
Masanobu Chiku1, Hiroki Takeda1, Shota Matsumura1
1Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University , Sakai, Osaka 599-8531, Japan.
Abstract:
Amorphous vanadium oxide/carbon composite (V2O5/C) was first applied to the positive electrode active material for rechargeable aluminum batteries. Electrochemical properties of V2O5/C were investigated by cyclic voltammetry and charge-discharge tests. Reversible reduction/oxidation peaks were observed for the V2O5/C electrode and the rechargeable aluminum cell showed the maximum discharge capacity over 200 mAh g(-1) in the first discharging. The XPS analyses after discharging and the following charging exhibited that the redox of vanadium ion in the V2O5/C active material occurred during discharging and charging, and the average valence of V changed between 4.14 and 4.85.
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