有色金属材料与工程2025，Vol.46Issue(2)：27-34,8.DOI:10.13258/j.cnki.nmme.20240312001
Mn位Ce取代的NaNi1/3Fe1/3Mn1/3O2钠离子电池正极材料的合成与电化学性能研究
Synthesis and electrochemical performance study of NaNi1/3Fe1/3Mn1/3O2 sodium-ion battery cathode material with Mn site substituted by Ce
摘要
Abstract
O3-type NaNi1/3Fe1/3Mn1/3O2 is considered as one of the most promising cathode materials for sodium-ion batteries due to its low cost,high theoretical capacity and ease of synthesis.However,its poor cycling stability remains a major issue that needs to be addressed.Ce was incorporated into the sample lattice in the Mn site,and it was found that the large ionic radius of Ce4+played a supportive role in the structure,hindered the interlayer slip of transition metal layer during the charge-discharge process,this enhanced the structural stability and provided a wider Na+transport channel,improved the Na+diffusion efficiency and the structural reversibility during the charge-discharge process,achieving improved cycling stability and rate performance.The modified NaNi1/3Fe1/3Mn1/3-0.0075Ce0.0075O2 showed considerable reversible capacity of 155.9 mA·h/g at a rate of 0.2 C within a voltage range of 2.0 V to 4.2 V,and the capacity retention rate was up to 73.5％after 100 cycles at a rate of 1.0 C.关键词
钠离子电池/层状氧化物正极/O3-NaNi1/3Fe1/3Mn1/3O2/Mn位Ce取代Key words
sodium ion batteries/layer oxide cathode/O3-NaNi1/3Fe1/3Mn1/3O2/Mn site substituted by Ce分类
动力与电气工程引用本文复制引用
黄帅,王奥予,高毓洋,袁涛..Mn位Ce取代的NaNi1/3Fe1/3Mn1/3O2钠离子电池正极材料的合成与电化学性能研究[J].有色金属材料与工程,2025,46(2):27-34,8.基金项目
国家自然科学基金资助项目(22379096) （22379096）
