摘要
通过熔融浸渍、分段烧结的方法用LiOH·H2 O和EMD制得尖晶石型LiMn2 O4 活性材料 ,对材料进行了元素分析和XRD结构表征 ,采用最小二乘法计算了样品的晶格常数 ,结果表明样品属于立方尖晶石结构 ,为缺锂型尖晶石锂锰氧。样品在高温下的充放电曲线和循环伏安曲线的测定结果表明样品的首次放电容量为 12 2 8mAh·g- 1,放电电压为 3 96V ,恒温充电电压为 4 0 7V ,二者差值仅为 0 11V ,说明以其为正极的电池的极化较小 ,在高温下具有良好的循环特性。
LiMn 2O 4 cathodes were prepared by melt impregnation method with LiOH·H 2O and EMD.The structure of the material was characterized by XRD and the lattice parameters of the sample was calculated by using least square method.The electrochemical performance of the cathodes at room temperature and elevated temperature was tested.And cyclic voltammetric study was performed at elevated temperature.The results showed that the structure of the sample was confirmed to be cubic spinel structure,The cell polarization of the cathode developed by LiOH·H 2O and EMD was identified to be 0.11V and the elevated temperature cyclability to be good.
出处
《精细化工中间体》
CAS
2002年第4期35-37,共3页
Fine Chemical Intermediates
基金
湖南省重点科技攻关项目 (湘科 2 0 0 0 -13 3 )
