摘要
为了提高锰氧化物负极材料的倍率和循环性能,采用沉淀法及热处理法,通过调控Mn2O3与Se粉的反应温度,制备Mn O/Mn3O4/Se Ox(x=0,2)复合负极材料。Mn O/Mn3O4/Se Ox负极在3 A/g电流密度下经过560次充放电循环后放电比容量为1007 m A·h/g。循环伏安法定量分析结果表明,在2.0 m V/s的扫描速率下赝电容贡献率高达89.5%。研究结果表明,Mn O与Mn3O4之间存在明显的协同效应。
To improve rate and cycling performance of manganese oxide anode material,a precipitation method was combined with thermal annealing to prepare the Mn O/Mn3O4/Se Ox(x=0,2)hybrid anode by controlling the reaction temperature of Mn2O3 and Se powders.At 3 A/g,the synthesized Mn O/Mn3O4/Se Ox anode delivers a discharge capacity of 1007 m A·h/g after 560 cycles.A cyclic voltammetry quantitative analysis reveals that 89.5%pseudocapacitive contribution is gained at a scanning rate of 2.0 m V/s,and the test results show that there is a significant synergistic effect between Mn O and Mn3O4 phases.
作者
黎烈武
王丽平
张明瑜
黄启忠
何克坚
吴飞翔
Lie-wu LI;Li-ping WANG;Ming-yu ZHANG;Qi-zhong HUANG;Ke-jian HE;Fei-xiang WU(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;College of Biological and Environmental Engineering,Changsha University,Changsha 410022,China;Advanced Research Center,Central South University,Changsha 410083,China;School of Metallurgy and Environment,Central South University,Changsha 410083,China)
基金
Project(2018JJ2513)supported by the Natural Science Foundation of Hunan Province,China
Project(18A378)supported by the Education Bureau Research Foundation of Hunan Province,China
Project(2019GK4012)supported by the Emerging Strategic Industrial Science and Technology Project of Hunan Province,China。
关键词
锂离子电池
锰氧化物
负极材料
赝电容效应
协同效应
lithium-ion battery
manganese oxide
anode material
pseudocapacitive behavior
synergistic effect
