中间相炭微球改性尖晶石LiMn_2O_4的性能

Performance of spinel LiMn_2O_4 modified by mesocarbon microbeads

用柠檬酸络合法制备了中间相炭微球(MCMB)改性的LiMn2O4,用XRD测试进行了研究。通过循环伏安测试,分析了MCMB加入量对样品性能的影响,用恒流充放电测试进行了验证。MCMB的加入减小了样品的晶胞参数,提高了放电平台电位,增大了峰电流。MCMB的添加量为3%时,样品的首次放电比容量为130.56 mAh/g,比纯LiMn2O4提高了17.8%。

The mesoearbon mierobeads （MCMB） modified LiMn204 was synthesized by critic acid complex method and researched hy XRD testing. Cyclic voltammetry （CV） testing was used to analyze the effects of MCMB adding amount to the deetroehemieal performance of samples and verified by galvanostatie charge-discharge test. The adding of MCMB reduced the crystal lattice parameters, raised the discharge plateau voltage and enlarged the peak current. The initial discharge specific capacity of sample with 3% MCMB was 130.56 mAh/g, raised 17.8% higher than that of pure LiMn2O4.