锂离子电池正极材料V_6O_(13)的合成与电化学性能  

Synthesis and Electrochemical Characterization of V_6O_(13) Cathode Materials for Li-ion Batteries

作　　者：邹正光[1,2] 程浩[1,2] 何金云[1,2] 龙飞[1,2] 颜泽宇[1,2] 刘元春[1] 

机构地区：[1]桂林理工大学材料科学与工程学院,桂林541004 [2]桂林理工大学有色金属材料及其加工新技术教育部重点实验室,桂林541004

出　　处：《人工晶体学报》2013年第7期1396-1401,共6页Journal of Synthetic Crystals

基　　金：广西自然科学基金(2013GXNSFDA019028)

摘　　要：分别采用固相法、水热法和溶剂热法制备了锂离子电池正极材料V6O13。研究了不同方法制备的V6O13的物相、形貌及电化学性能。结果表明:固相法和水热法得到的V6O13纯度较低,但结晶较好;而溶剂热法合成的V6O13物相纯净,样品呈片状结构;水热法和溶剂热法制备的样品均有微量的晶格收缩。电化学性能测试表明,固相法和水热法得到的V6O13首次放电容量较大,但衰减快;溶剂热法制备的V6O13首次放电容量略低,但循环性能优异,经过52次循环,其放电比容量保持在220 mAh/g,没有衰减。Different samples of V6O13 were successfully synthesized via solid phase method,hydrothermal synthesis method and solvothermal synthesis method,respectively.The phase,morphology and electrochemical performances of these samples were discussed in detail.Samples prepared by solid phase method and hydrothermal synthesis method were growing with lower purity and high crystallinity.V6O13 prepared by solvothermal synthesis method was growing with purity and consisted of the predominant slices.It was also showed that trace amount of lattice contraction was performed in V6O13 obtained by both hydrothermal synthesis method and solvothermal synthesis method.After the electrochemical tests,it appeared that the capacities of V6O13 prepared by solid phase method and hydrothermal synthesis method faded rapidly.By contrast,V6O13 obtained by solvothermal synthesis method enabled to show excellent cycle performance,and possessed a reversible capacity of 220 mAh / g after 52 deep cycles.

关 键 词：固相法 水热法 溶剂热法 V6O13 放电容量 

分 类 号：TM911[电气工程—电力电子与电力传动]