电力科技与环保2025，Vol.41Issue(2)：194-205,12.DOI:10.19944/j.eptep.1674-8069.2025.02.003
锂离子电池正极材料Li[Ni0.8Co0.1Mn0.1]O2的可控合成与Ca掺杂改性
Controlled preparation and calcium-doping modification of Li[Ni0.8Co0.1Mn0.1]O2 Cathode material for Lithium-Ion batteries
摘要
Abstract
[Objective]As the core component of battery module,cathode material is the key point of to high energy density of battery.Among them,the high nickel ternary material has become the first choice for cathode materials because of its low cost and high capacity.However,due to the presence of nickel elements,lithium-nickel mixing occurs and the battery cycle stability is extremely poor.Herein,the preparation and calcium doping modification of terpolymer Li[Ni0.8Co0.1Mn0.1]O2(NCM811)were studied.[Methods]The precursor of ternary material NCM811 was prepared by coprecipitation method.The optimum synthesis conditions were obtained by analyzing the effects of different standing time on the morphology,structure and electrochemical properties of the particles.Calcium is used as doping element and modify ternary material to improve their capacity and circulation performance.[Results]The study showed that the multiplicity of 10 h of resting showed better performance,but the first discharge capacity is higher at 1 h.The specific discharge capacity and capacity retention rate after 100 cycles for 1 h and 10 h are very close to each other.When the calcium doping is 3%,the opposite effect will appear,leading to the intensification of cationic mixing,and the deterioration of circulation and magnification properties.The result is calcium doped at 2%for the optimal doping amount.The NCM material with a doping capacity of 2%has a discharge specific capacity of 178.25 mA·h/g at 0.1 C,a Coulomb efficiency of 81.55%,a discharge specific capacity of 154.64 mA·h/g and a capacity retention rate of 86.37%after 100 cycles at 1 C.Material synthesised with a resting time of 10 h has better multiplicative properties.[Conclusion]Appropriate amount of calcium doping can reduce the degree of cation mixing and discharging,which significantly improves the discharge specific capacity and capacity retention of ternary materials,and improves the cycling and multiplication performance of ternary materials.关键词
Li[Ni0.8Co0.1Mn0.1]O2/锂离子电池/正极材料/电化学性能/钙掺杂Key words
Li[Ni0.8Co0.1Mn0.1]O2/lithium ion batteries/cathode material/electrochemical properties/calcium doping分类
能源与动力引用本文复制引用
安鹏燕,王舒冉,董默涵,傅世郑,张一龙,王家顺,张德柳,刘朝孟..锂离子电池正极材料Li[Ni0.8Co0.1Mn0.1]O2的可控合成与Ca掺杂改性[J].电力科技与环保,2025,41(2):194-205,12.基金项目
国家自然科学基金青年基金项目(52204308) （52204308）
辽宁省自然科学基金面上项目(2023-MSBA-101) （2023-MSBA-101）
中国博士后科学基金面上项目(ZX20220158) （ZX20220158）
东北大学博士后基金一等资助项目 （）
东北大学高校基本科研业务费项目大学生创新创业训练项目. （）
