机械球磨法制备纳米CrTaO_4锂离子电池负极材料及其电化学性能研究  

Nanoparticles CrTaO_4 by Mechanical Ball-milling Method as Anode Materials for Lithium-ion Battery and the Research into Their Electrochemical Performance

作　　者：焦光华[1,2] 霍达[2] 王健[1,2] 吕林泽[2] 张弛[2] 仲玮[2] 钱斌[1,3,2] 陶石[3,2] 韩志达[1,3,2] 

机构地区：[1]苏州大学材料与化学化工学部,江苏苏州215006 [2]常熟理工学院物理与电子工程学院,江苏常熟215500 [3]江苏省新型功能材料重点建设实验室,江苏常熟215500

出　　处：《常熟理工学院学报》2017年第4期1-4,11,共5页Journal of Changshu Institute of Technology

基　　金：国家自然科学基金"层状铁磷族化物Cu Fe(1-x)TMx(As;P)中的磁性研究"(11374043);江苏省高校自然科学基金重大项目"新型过渡金属硫族化合物能源材料的研究"(15KJA430001);江苏省六大人才高峰项目"低成本高矫顽力层状无稀土永磁材料研发"(2012-XCL-036);江苏省科技厅成果转化专项资金项目"高安全性高性能三元动力锂电池模组的研发及产业化"(BA2016041)

摘　　要：采用机械球磨法制备CrTaO_4纳米材料,并首次将其作为锂离子电池负极材料.利用X射线衍射分析(XRD)、扫描电子显微镜(SEM)、充放电测试、循环伏安(CV)测试和电化学交流阻抗测试(EIS)对材料的结构、形貌和电化学性能进行表征.与传统块材CrTaO_4相比,球磨后的CrTaO_4首次放/充电容量由313/147 mAh/g提高到508/309 mAh/g,充放电50次后放电容量可以保持在124 mAh/g,同时不同倍率进行充放电,充放电80次后改性样品的放电容量仍可维持在140 mAh/g,有效提高了电化学性能.CrTaO4 was successively prepared by mechanical ball-milling method and its electrochemical properties were first discussed as an anode material in lithium-ion batteries. The structure, morphology and electrochemical properties were characterized using X-ray diffraction （XRD）, scanning electron microscope （SEM）, galvanostatic discharge-charge test, cyclic voltammetry （CV） and electrochemical impedance spectra （EIS）. Compared with the traditional CrTaO4 material, the initial discharge/charge capacity of sample was improved from 313/147 mAh/g to 508/309 mAh/g through ball-milling method, and discharge capacity could be maintained at 124 mAh/g after 50 cycles. Meanwhile, the discharge capacity could be maintained at 140 mAh/g after 80 cycles at diferent charge-discharge rate.

关 键 词：锂离子电池 机械球磨 CrTaO4 负极 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动]