煅烧温度对钠离子电池O3-NaNi_(0.33)Fe_(0.33)Mn_(0.33)O_(2)正极材料的影响  

Effect of calcination temperature on O3-NaNi_(0.33)Fe_(0.33)Mn_(0.33)O_(2)cathode material for sodium ion battery

作　　者：刘冬梅[1] 何一芃 余凌智 周旺 陈杰[1] LIU Dong-mei;HE Yi-peng;YU Ling-zhi;ZHOU Wang;CHEN Jie(Southeast University Chengxian College,Nanjing 210088,China;CRRC Electric Vehicle Co.,Ltd.,Zhuzhou 412007,China;Zhuzhou CRRC Times Electric Co.,Ltd.,Zhuzhou 412000,China)

机构地区：[1]东南大学成贤学院基础部,江苏南京210088 [2]中车时代电动汽车股份有限公司,湖南株洲412007 [3]株洲中车时代电气股份有限公司,湖南株洲412000

出　　处：《现代化工》2024年第12期176-180,187,共6页Modern Chemical Industry

摘　　要：O3型正极材料因较高的理论比容量成为钠离子电池正极材料研究的热点。采用共沉淀法制备Ni_(0.33)Fe_(0.33)Mn_(0.33)(OH)_(2)前驱体并配钠煅烧为O3-NaNi_(0.33)Fe_(0.33)Mn_(0.33)O_(2)正极材料,探究煅烧温度对该正极材料物相结构与电化学性能的影响。结果表明,煅烧温度影响正极材料表面钠残渣含量,进而影响其电化学性能。2.0~4.0 V的电压范围内,850℃下制备的NaNi_(0.33)Fe_(0.33)Mn_(0.33)O_(2)正极材料表现出最优电化学性能,1 C下循环100次后容量保持率为71.08%,5 C下放电比容量为91.67 mAh/g。O3-type cathode material has become a research hotspot for sodium-ion battery due to its high theoretical specific capacity.NaNi_(0.33)Fe_(0.33)Mn_(0.33)(OH)_(2)precursor is prepared via a coprecipitation method,and then calcined with sodium to obtain O3-NaNi_(0.33)Fe_(0.33)Mn_(0.33)O_(2)cathode material.The influence of calcination temperature on the phase structure and electrochemical performance of this cathode material is explored.Results show that calcination temperature affects the content of sodium residue on the surface of the cathode material,which in turn affects its electrochemical performance.Within the voltage range of 2.0-4.0 V,NaNi_(0.33)Fe_(0.33)Mn_(0.33)O_(2)cathode material prepared at 850℃exhibits the optimal electrochemical performance,its capacity retention rate is 71.08%after 100 cycles at 1 C and its discharge specific capacity is 91.67 mAh·g^(-1)at 5 C.

关 键 词：钠离子电池 Ni/Fe/Mn基正极材料 表面残碱 

分 类 号：TM911[电气工程—电力电子与电力传动]