有色金属科学与工程2023，Vol.14Issue(6)：808-815,8.DOI:10.13264/j.cnki.ysjskx.2023.06.008
掺杂-包覆改性单晶LiNi0.83Co0.12Mn0.05O2的制备技术及性能研究
Preparation technology and properties of modified single-crystalline LiNi0.83Co0.12Mn0.05O2 cathode materials by doping and coating
摘要
Abstract
Ni-rich ternary positive materials have become one of the most preferred cathode materials for application in power lithium-ion batteries owing to their high energy density.However,these cathode materials suffer from inferior cycling performance and poor rate capability,seriously impeding their practical application to scale.The single crystallization of ternary materials can effectively mitigate the generation of particle cracking and improve the cycling stability of Ni-rich cathode materials.At the same time,high-valence cationic doping can effectively improve the transmission rate of lithium ions,and the charge-discharge performance of high-nickel ternary materials.In this paper,nickel-rich single crystal LiNi0.83Co0.12Mn0.05O2 materials doped with W6+ and Zr4+,combined with H3BO3 and Al2O3 double coating was prepared by high-temperature solid phase method,and their changes in electrochemical properties was explored.It is found that LiNi0.83Co0.12Mn0.05O2 doped with W-Zr displays better electrochemical performance compared with the un-doped cathode under the different magnifications specific discharge capacity in 3.0-4.3 V.The capacity retention rate of LiNi0.83Co0.12Mn0.05O2 materials with H3BO3 and Al2O3 double coating was 96.7%after 100 cycles at 1.0 C.关键词
双掺杂/双包覆/镍钴锰酸锂/循环稳定性Key words
double doping/double coating/lithium nickel cobalt manganese oxide/cycle stability分类
信息技术与安全科学引用本文复制引用
王俊安,钟盛文,岳波,黄小丽,陈伟,魏兴权,曾敏,刘晶晶,文冠军..掺杂-包覆改性单晶LiNi0.83Co0.12Mn0.05O2的制备技术及性能研究[J].有色金属科学与工程,2023,14(6):808-815,8.基金项目
中华人民共和国工业和信息化部"产业链协同创新"专项(TC220H06P) （TC220H06P）
江西省教育厅科技项目(GJJ200850) （GJJ200850）
江西省重大科技研发专项(20213AAE02010) （20213AAE02010）
