Electrochemical performance of the nanostructured biotemplated V2O5 cathode for lithium-ion batteries

Abstract We report for the first time fabrication of nanostructured V 2 O 5 thin film cathodes for lithium-ion batteries using Tobacco mosaic virus ( TMV ) particles as biological templates. TMV -templated V 2 O 5 electrodes showed enhanced electrochemical performance compared to electrodes with a planar configuration demonstrating high specific capacity, excellent rate capability and cycling stability. A specific capacity of 12 μAh cm −2 was achieved for the TMV -templated electrode with a V 2 O 5 layer thickness of ∼30 nm, which is 7–8 times higher than the specific capacity of planar V 2 O 5 electrodes of the same thickness. Higher areal specific capacities are achievable by increasing active battery material loading: electrodes with twice higher V 2 O 5 loading delivered capacities of ∼25 μAh cm −2 . Development of the cathode is an important step towards the fabrication of rechargeable lithium-ion batteries with superior virus-templated electrodes for high performance electrochemical energy storage.

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