Facile synthesis of Li3V2（PO4）3/C cathode material for lithium-ion battery via freeze-drying  

作　　者：Shuainan Guo Ying Bai Zhenfeng Geng Feng Wu Chuan Wu 

机构地区：[1]Beijing Key Laboratory of Environmental Science and Engineering,School of Materials Science & Engineering,Beijing Institute of Technology,Beijing 100081,China [2]Collaborative Innovation Center of Electric Vehicles in Beijing,Beijing 100081,China

出　　处：《Journal of Energy Chemistry》2019年第5期159-165,共7页能源化学（英文版）

基　　金：supported by the National Key R&D Program of China(No.2016YFB0100500)

摘　　要：In this work, we report a facile route for the synthesis of Li3V2(PO4)3/C cathode material via freezedrying and then calcination. The effect of calcination temperature on the electrochemical properties of the Li3V2(PO4)3/C is also investigated. When used as a lithium-ion battery cathode, the optimized Li3V2(PO4)3/C (LVP-800) through calcination at 800 ℃ exhibits a high initial charge and discharge capacity. The excellent electrochemical performance of LVP-800 is attributed to the good crystallinity and uniform morphology of the electrode material. In addition, the residual carbon can also improve the conductivity and buffer the volume expansion during the Li-ion extraction/reinsertion. Meanwhile, charge compensation also plays an important role in excellent electrochemical performance.In this work, we report a facile route for the synthesis of Li3V2（PO4）3/C cathode material via freezedrying and then calcination. The effect of calcination temperature on the electrochemical properties of the Li3V2（PO4）3/C is also investigated. When used as a lithium-ion battery cathode, the optimized Li3V2（PO4）3/C（LVP-800） through calcination at 800 °C exhibits a high initial charge and discharge capacity. The excellent electrochemical performance of LVP-800 is attributed to the good crystallinity and uniform morphology of the electrode material. In addition, the residual carbon can also improve the conductivity and buffer the volume expansion during the Li-ion extraction/reinsertion. Meanwhile, charge compensation also plays an important role in excellent electrochemical performance.

关 键 词：Li3V2(PO4)3/C FREEZE-DRYING Charge compensation LITHIUM-ION battery 

分 类 号：O4[理学—物理]