球磨微波法制备Li_3V_2(PO_4)_3/C及其电化学性能表征  

Synthesis and Electrochemical Characterization of Li_3V_2(PO_4)_3/C Cathode Material by Ball-Milling Assisted Microwave Method

作　　者：唐致远[1] 毛文峰[1] 闫继[1] 袁威[1] 张新河 

机构地区：[1]天津大学化工学院,天津300072 [2]迈科科技有限公司,广东东莞523800

出　　处：《电化学》2012年第4期318-321,共4页Journal of Electrochemistry

基　　金：国家自然科学基金项目(No.20973124);广东省重大科技专项(No.2009A080208001)资助

摘　　要：本文采用球磨微波法合成锂离子电池正极材料Li3V2(PO4)3/C,并研究了微波辐射时间对样品电化学性能的影响.结果表明,640 W微波辐射18 min合成的材料,结晶度高,粒径小而均匀.该电极5C倍率下首次放电比容量达101.3 mAh·g-1,300周期循环,其放电比容量仍保持100.8 mAh·g-1,展示出良好的应用前景.The cathode materials of LigV2 （PO4） 3/C were successfully synthesized by ball-milling assisted microwave method and the microwave irradiation time was also optimized. It is found that the Li3V2 （PO4 ）3/ C material obtained at a microwave power of 640 W for 18 rain shows the best electrochemical performance with the initial reversible capacity of 101.3 mAh·g^-1 and the remained 100.8mAh·g^-1 at 5C rate after 300 cycles. This excellent electrochemical capability may be resulted from good crystallinity, smaller and uniform particle size of the material, showing a great promise for battery applications.

关 键 词：锂离子电池 Li3V2(PO4)3/C 微波合成 

分 类 号：TM912[电气工程—电力电子与电力传动]