掺锑二氧化锡包覆改善LiNi_(0.82)Co_(0.11)Mn_(0.07)O_(2)正极材料性能研究  

Research on the improvement of Sb-doped SnO2coated LiNi_(0.82)Co_(0.11)Mn_(0.07)O_(2)

作　　者：许国峰 马帅[1] 裴东 王九洲 XU Guofeng;MAShuai;PEI Dong;WANG Jiuzhou(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》2023年第1期24-27,共4页Chinese Journal of Power Sources

摘　　要：采用固相法在LiNi_(0.82)Co_(0.11)Mn_(0.07)O_(2)(高镍NCM)正极材料表面包覆了纳米掺锑二氧化锡(ATO),并对比了不同包覆比例对正极材料性能的影响。扫描电子显微镜(SEM)检测表明,ATO在高镍NCM正极材料表面均匀分布。相比未包覆的高镍NCM正极材料(P-NCM),经过包覆的高镍NCM(ATO-NCM)表现出了更好的倍率性能与循环性能,0.25%(质量分数)ATO-NCM常温时3 C的放电比容量可达178.76 mAh/g,而P-NCM的放电比容量仅为166.02 mAh/g,1 C 50次循环后,0.25%的ATO-NCM材料的循环容量保持率为95.6%,远高于P-NCM的91.2%。ATO包覆可将高镍NCM的热分解温度提升10℃以上,且放热量更低。Nano antimony doped tin dioxide (ATO) was coated on the surface of the cathode materia LiNi_(0.82)Co_(0.11)Mn_(0.07)O_(2)(NCM) by solid state method,and the effects of different coating ratios on the properties were compared.SEM showed that ATO was evenly distributed on the surface of high nickel NCM cathode material Compared with the uncoated material (P-NCM),the coated NCM (ATO-NCM) shows better rate performance and cycle performance.At room temperature,the specific discharge capacity of 0.25%ATO-NCM at 3 C can reach 178.76mAh/g,while that of P-NCM is only 166.02 mAh/g.After 50 cycles at 1 C,the cycle capacity retention rate of 0.25%ATO-NCM material is 95.6%,much higher than 91.2%of P-NCM.ATO coating can increase the therma decomposition temperature of high nickel NCM by more than 10℃and lower heat release.

关 键 词：正极材料 掺锑二氧化锡 表面包覆 

分 类 号：TM912[电气工程—电力电子与电力传动]