材料科学与工程学报2011，Vol.29Issue(5)：698-701,710,5.
正极材料zLi2MnO3·（1-z）LiNi0.4Mn0.4Co0.2O2的合成与性能
Synthesis and Performance of zLi_2MnO_3·（1-z）LiNi_（0.4）Mn_（0.4）Co_（0.2）O_2
摘要
Abstract
Lithium-rich-layered cathode materials zLi2MnO3·（1-z）LiMn0.4Ni0.4Co0.2O2（z=0.2,0.4,0.6） have been successfully synthesized by coprecipitation and calcination through the examinations with x-ray diffractometry（XRD） and electrochemical performance.The material of z=0.4 delivers discharge capacity 210mAh/g（2-4.8V,0.05C） better than that of z=0.6,and its cyclability after 20 cycles without fade is superior to that of z=0.2.The analysis of differential-capacity plot and electrochemical performance concerning 0.2Li2MnO3·0.8LiNi0.4Mn0.4Co0.2O2 indicates that the higher Ni/（Co＋Mn） ratio as well as the inherently smaller amount of Li2MnO2 could be the reason for capacity fade.However,the lower LiNi0.4Mn0.4Co0.2O2 content in z=0.6 could result in its lower capacity.The composition of z=0.4 with the optimal amount of Li2MnO3 to stabilize the material structure and that of active LiNi0.4Mn0.4Co0.2O2 to contribute the capacity has the best combination of capacity and cyclability.关键词
zLi2MnO3·（1-z）LiMn0.4Ni0.4Co0.2O2/正极材料/循环性能/容量Key words
zLi2MnO3·（1-z）LiMn0.4Ni0.4Co0.2O2/cathode/cyclability/capacity分类
通用工业技术引用本文复制引用
钟耀东,李志同,郭远刚,周权,周凤瑞,强颖怀,杨凌玲,霍瑛,赵思茜..正极材料zLi2MnO3·（1-z）LiNi0.4Mn0.4Co0.2O2的合成与性能[J].材料科学与工程学报,2011,29(5):698-701,710,5.基金项目
中国矿大科研基金资助项目 （）
中国矿大攀登计划资助项目 （）
