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Orthorhombic γ-LiV2O5 as Cathode Materials in Lithium Ion Batteries: Synthesis and Property
Na Li*,Hua-xu Gong,Yi-tai Qian
Author NameAffiliationE-mail
Na Li* Department of Chemistry, University of Science and Technology of China, Hefei 230026, China linasx@mail.ustc.edu.cn 
Hua-xu Gong Department of Chemistry, University of Science and Technology of China, Hefei 230026, China  
Yi-tai Qian Department of Chemistry, University of Science and Technology of China, Hefei 230026, China  
Abstract:
The rod-like and bundle-like γ-LiV2O5 were synthesized via a simple solvothermal process-ing. The rod-like γ-LiV2O5 with diameter of 500-800 nm and the bundle-like architectures are composed of several of order-attached rods with diameter of 100-600 nm. γ-LiV2O5 were synthesized using LiOH·H2O, NH4VO3, HNO3, C2H5OH without and with PVP as raw materials. At the same time, the actual formation mechanism of γ-LiV2O5 was also investigated. As the cathode materials for lithium ion batteries, the bundle-like γ-LiV2O5 prepared with PVP delivers a better electrochemical performance, which has an initial dis-charge capacity of 269.3 mAh/g at a current density of 30 mA/g and is still able to achieve 228 mAh/g after the 20th cycle. The good electrochemical properties of the as-synthesized γ-LiV2O5 coupled with the simple, relatively low temperature, and low cost of the prepara-tion method may make this material a promising candidate as a cathode material for lithium ion batteries.
Key words:  Lithium ion battery, Electrochemical property, Cathode material, γ-LiV2O5
FundProject:
锂离子正极材料正交相γ-LiV2O5的制备及性能
李娜*,龚华旭,钱逸泰
摘要:
分别采用LiOH·H2O, NH4VO3, HNO3, C2H5OH作为原料在没有PVP和有PVP存在下合成了棒状和棒束状两种相貌的γ-LiV2O5. 棒状γ-LiV2O5材料中棒的直径为500~800 nm,而棒束状的γ-LiV2O5材料则是直径为100~600 nm的棒组成的,形貌比较均匀. 同时研究了此体系中γ-LiV2O5的合成机制. 将合成的材料进行电化学测试,棒束状的γ-LiV2O5 的电化学性能更好,在电流密度为30 mA/g时的初始放电比容量为269.3 mAh/g,循环20次之后容量仍保持在228 mAh/g.
关键词:  锂离子电池,电化学性能,正极材料,γ-LiV2O5
DOI:10.1063/1674-0068/26/05/597-600
分类号: