亚微米级尖晶石LiMn_2O_4的制备和性能  

Preparation and performance of submicrometer spinel LiMn_2O_4

作　　者：曾荣华[1] 吕东生[1] 李伟善[1] 刘煦 邱仕洲 

机构地区：[1]华南师范大学化学系,广东广州510631 [2]广州电池厂,广东广州510655

出　　处：《电池工业》2005年第1期23-25,共3页Chinese Battery Industry

基　　金：广东省自然科学基金(011443);广东省重点教师资助项目(Q02088)

摘　　要：介绍了用溶胶-凝胶法制备亚微米级尖晶石锂锰氧化物的制备过程、条件和设备;采用扫描电镜、恒电流充放电以及交流阻抗法研究制备样品的性能。结果表明,分别在500℃、600℃、700℃热处理的3种样品首次充放电容量和充放电效率基本相同,首次充放电容量平均高达118mAh·g-1/115mAh·g-1左右,充放电效率在95%以上。Submicrometer spinel LiMn_2O_4 particles were prepared by sol-gel process and the products were characterized by SEM,constant current charge-discharge and EIS.The results showed that the products heat-treated at 5 00℃,600℃ and 700℃ had the same first charge-discharge capacity and efficiency,which were 118 mAh·g^(-1)/115 mAh·g^(-1) and 95% respectively.

关 键 词：锂离子电池 溶胶-凝胶法 锂锰氧化物 首次充放电 交流阻抗 

分 类 号：TM912.9[电气工程—电力电子与电力传动]