YF_(3)掺杂对LiNi_(0.88)Co_(0.10)Al_(0.02)O_(2)单晶正极材料电性能的影响  

Effect of YF_(3) doping on electrical properties of LiNi_(0.88)Co_(0.10)Al_(0.02)O_(2) high nickel single crystal cathode material

作　　者：裴东 周双双[1] 李文升 许国峰 PEI Dong;ZHOU Shuangshuang;LI Wensheng;XU Guofeng(Tianjin Lantian Solar Tech Co.,Ltd.,Tianjin 300384,China;Tianjin Institute of Power Sources,Tianjin 300384,China)

机构地区：[1]天津蓝天太阳科技有限公司,天津300384 [2]中国电子科技集团公司第十八研究所,天津300384

出　　处：《电源技术》2022年第10期1105-1107,共3页Chinese Journal of Power Sources

摘　　要：采用固相烧结方法制备出YF_(3)掺杂的LiNi_(0.88)Co_(0.10)Al_(0.02)O_(2)高镍单晶三元材料,研究了Y、F阴阳离子共掺杂不同掺杂量对单晶形貌及电性能的影响。结果表明:掺杂YF_(3)后显著提升了材料的比容量、倍率性能及循环性能。与未掺杂的样品相比,YF_(3)掺杂量为0.5%时,材料电性能最佳,首次放电比容量由未掺杂样品的192 mAh/g提升至198.99 mAh/g,3 C/0.2 C容量保持率由79.29%提升至90.97%,循环50圈后材料的容量保持率由92.88%提升至98.4%。A LiNi_(0.88)Co_(0.10)Al_(0.02)O_(2) high nickel single crystal cathode material with YF_(3) doped was prepared by solidphase sintering method,single crystal morphology and electrical properties were discussed based on the different doping amounts.The capacity,rate performance and cycle performance of the material were enhanced obviously after the doping of YF_(3).Compared with the undoped sample,when the YF_(3) doping amount is 0.5%,the material has the best electrical performance.The first discharge specific capacity is increased from 192 mAh/g to 198.99 mAh/g,the capacity retention rate of 3 C/0.2 C increases from 79.29%to 90.97%,and the cycle performance of the material after 50 cycles increases from 92.88%to 98.4%.

关 键 词：高镍单晶正极材料 LiNi_(0.88)Co_(0.10)Al_(0.02)O_(2) YF_(3) 

分 类 号：TM912[电气工程—电力电子与电力传动]