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

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• 作者：Ekaterina Pomerantseva^a ; ^b ; ^{epomeran@umd.edu} ; Konstantinos Gerasopoulos^a ; ^b ; ^c ; Xinyi Chen^c ; Gary Rubloff^b ; ^c ; Reza Ghodssi^a ; ^b ; ^c ; ^{ghodssi@umd.edu}
• 关键词：Lithium-ion battery ; Vanadium oxide ; Cathode material ; Tobacco mosaic virus template ; Nanostructuring
• 刊名：Journal of Power Sources
• 出版年：2012
• 期刊代码：58_03787753
• 类别：ce
• 出版时间：15 May, 2012
• 卷：206
• 期：Complete
• 页码：282-287
• 文件大小：469 K

摘要

We report for the first time fabrication of nanostructured V₂O₅ thin film cathodes for lithium-ion batteries using Tobacco mosaic virus (TMV) particles as biological templates. TMV-templated V₂O₅ 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 渭Ah cm^鈭? was achieved for the TMV-templated electrode with a V₂O₅ layer thickness of 鈭?0 nm, which is 7-8 times higher than the specific capacity of planar V₂O₅ electrodes of the same thickness. Higher areal specific capacities are achievable by increasing active battery material loading: electrodes with twice higher V₂O₅ loading delivered capacities of 鈭?5 渭Ah cm^鈭?. 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.