电池2018，Vol.48Issue(2)：90-94,5.DOI:10.19535/j.1001-1579.2018.02.006
LiCoPO4正极材料掺Zn2+及全电池特性
Zn2+ doping of LiCoPO4 cathode material and its full battery performance
摘要
Abstract
Zinc ion(Zn2 +) doped lithium cobalt phosphate(LiCoPO4) cathode materials LiZnx Co1-x PO4 were prepared by the citric acid-based sol-gel method.XRD and SEM analysis showed that doping a small amount of Zn2 + did not affected the lattice structure;the particle size was smaller and more uniform.Charge-discharge(3.0-5.1 V) and high/low temperature performance tests showed that the specific capacity was increased and cycle performance was enhanced after Zn2 + doping,the material had fine high rate and high/low temperature performance.When the Zn2+ doping amount was 0.01,the initial specific discharge capacity of 0.1 C was 150.3 mAh/g,which was 15％ higher than that of the pure one.The specific discharge capacity of 1.0 C and 5.0 C was 118.9 mAh/g and 67.1 mAh/g,respectively.The specific discharge capacity of 0.1 C at 40 ℃ and 0 ℃ was 160.0 mAh/g and 37.8 mAh/g,respectively.The charge transfer impedance was decreased and the reversibility of lithium extraction/insertion and electrochemical reaction were improved after Zn2 + doping,via cyclic voltammetric and A.C.impedance spectroscopy tests.The specific capacity of 3.3 V full cell which composed of LiZn0.01Co0.99PO4 and Li4Ti5O12 was up to 135.3 mAh/g when discharged with 0.1 C.关键词
锂离子电池/正极材料/磷酸钴锂(LiCoPO4)/锌离子(Zn2+)掺杂Key words
Li-ion battery/cathode material/lithium cobalt phosphate (LiCoPO4)/zinc ion(Zn2 +) doping分类
信息技术与安全科学引用本文复制引用
陈龙,李海君,陈敏,栗欢欢..LiCoPO4正极材料掺Zn2+及全电池特性[J].电池,2018,48(2):90-94,5.基金项目
国家自然基金(21501071),国家科技支撑计划(2015BAG07B00),江苏省科技支撑计划重点项目(BE2014008,BE2014008-2),江苏省六大人才高峰项目(2016-XNYQC-003,2015-XNYQC-008),江苏省科技成果转化专项资金项目(BA2016162),镇江市重点研发计划(GY2015044) （21501071）
