High performance LiV₃O₈ cathode materials prepared by spray-drying method

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• 作者：Xunhui Xiong ; Zhixing Wang ; ^{xxhui881118@126.com} ; Huajun Guo ; Xinhai Li ; Feixiang Wu ; Peng Yue
• 关键词：Lithium ion battery ; Cathode materials ; LiV3O8 ; Spray-drying method ; Porous materials
• 刊名：Electrochimica Acta
• 出版年：2012
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：1 June, 2012
• 卷：71
• 期：Complete
• 页码：206-212
• 文件大小：1656 K

摘要

Layered LiV₃O₈ as promising cathode material for rechargeable lithium-ion batteries has been efficiently synthesized by an improved spray-drying method followed by heating at different temperatures. Results of X-ray diffraction, scanning electron microscopy, charge-discharge test, cyclic voltammogram and electrochemical impedance spectroscopy indicate that the sample heat-treated at 300 掳C shows the best electrochemical performance. The LiV₃O₈ obtained at 300 掳C displays a maximum discharge capacity of 338.9 mAh g^鈭? at current density of 25 mA g^鈭? and after 20 cycles, a discharge capacity with 330.5 mAh g^鈭? is obtained. Most important is that it displays an excellent cycling stability at large current density. It exhibits high discharge capacity of 251 mA g^鈭? at current density of 125 mA g^鈭? after 50 cycles.