摘要
采用将Li2CO3,电解二氧化锰(EMD)和Co(NO3)2·6H2O混合进行高温固熔反应的合成方法,制备了1种尖晶石型金属氧化物催化材料LiMn2-xCoxO4。通过电化学测试(极化曲线、放电曲线)、X射线衍射分析(XRD)以及扫描电镜(SEM)等方法对电极的微观结构和性能进行了研究。实验结果表明,以LiMn1.95Co0.05O4为催化材料的气体扩散电极具有最好的综合电化学性能。其0.9V极化电位时的最大电流密度可达210mA/cm2AA型(5号)样品电池以100mA电流恒流放电,容量可高达4439mAh。
The spinel-type oxides LiMn2-xCoxO4 were prepared by sintering the compound,powder composed of lithium carbonate (Li2CO3), electrolytic manganese dioxide(EMD), and Co(NO3) (2) . 6H2O at high temperature. A manufacturing process for preparing two-layer Teflon-bonded O-2 diffusion electrodes in practical sizes for battery applications was developed. The microstructure and the performance of the electrodes were studied experimentally using electrochemical, physical and imaging techniques. The x value was optimized for the best catalytic activity. An electrode loaded with LiMn1.95Co0.05O4 catalysts showed the best performance, and the maximum discharging current density attained to 210 mA/cm(2). The cell loaded with LiMn1.95Co0.05O4 catalysts had capacity of 4 439mAh.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2002年第6期437-439,共3页
Rare Metal Materials and Engineering
基金
广东省重点科技攻关项目(2002A1100601)
广州市科技重点攻关项目(025G3171)资助
关键词
锌空气电池
空气电极
spinel
sintering
catalyst
diffusion electrodes
