摘要
分别以湿法沉淀的球形四氧化三锰（Mn3O4）和商业电解二氧化锰（EMD）为锰源合成锰酸锂（Li Mn2O4）。通过杂质含量分析、XRD、SEM和充放电测试等,研究锰源对产物性能的影响。以粒度为10μm的球形Mn3O4为原料合成的Li Mn2O4保留了锰源的物化特征,以1.0 C在3.00~4.35 V充放电,首次放电比容量为117.2 m Ah/g,常温、55℃高温循环100次的容量保持率分别为94.6%和91.0%,高于以EMD为原料合成的Li Mn2O4（分别为87.9%和72.9%）。循环性能的提高,与球形Li Mn2O4的粒度分布集中、比表面积小及杂质含量低有关。
Spherical trimanganese tetraoxide（Mn3O4） was synthesized by precipitation method,spinel cathode lithium manganese oxide（LiMn2O4） was prepared from spherical Mn3O4 and commercial electrolytic manganese dioxide（EMD） as manganese source,respectively. The effect of different manganese source on LiMn2O4 was investigated by impurity content analysis,XRD,SEM and charge-discharge test,etc. LiMn2O4 samples prepared from Mn3O4 with the particle size of 10 μm kept the physical and chemical characteristics from manganese source,when charged-discharged in 3. 00 ~ 4. 35 V at 1. 0 C,the initial discharge capacity was 117. 2m Ah / g,capacity retention was 94. 6% and 91. 0% after 100 cycles at room temperature and high temperature 55 ℃,respectively,higher than LiMn2O4 prepared from EMD（87. 9% and 72. 9%,respectively）. It could ascribe to the narrow particle size distribution,small specific surface area and low impurity contents.
出处
《电池》
CAS
CSCD
北大核心
2015年第1期22-25,共4页
Battery Bimonthly
基金
湖南省战略性新兴产业科技攻关项目(2013GK4068)
长沙市2014年培育战略性新兴产业科技支撑资金(k1401022-11)
