助熔剂法低温制备高压实密度LiMn2O4  

High compacted density LiMn2O4 prepared by flux method at low temperature

作　　者：汪永斌 彭爱国 贺周初 庄新娟 WANG Yong-bin;PENG Ai-guo;HE Zhou-chu;ZHUANG Xin-juan(Hunan Haili Lithium Battery Polytron Technology Inc.,Changsha,Hunan 410007,China)

机构地区：[1]湖南海利锂电科技股份有限公司,湖南长沙410007

出　　处：《电池》2020年第2期150-152,共3页Battery Bimonthly

摘　　要：将16~18μm和3~5μm两种粒度分布的二氧化锰(MnO2)前驱体按5∶1搭配,加入0.3%的复合助熔剂B2O3-Nb2O5,在低温770℃下制备锰酸锂(LiMn2O4)正极材料。对材料进行XRD、SEM、比表面积、压实密度及电化学性能分析。材料的压实密度为3.12 g/cm^3,以1 C在3.0~4.3 V充放电,首次放电比容量为123.4 m Ah/g;循环100次的容量保持率为96.5%。Cathode material lithium manganate (LiMn2O4) was prepared at low temperature 770 ℃ by using two kinds of manganese dioxide(MnO2) precursors with different particle size distribution of 16-18 μm and 3-5 μm in a ratio of 5 ∶1,0.3%composite flux B2O3-Nb2O5 was added.The material was analyzed by XRD,SEM,specific surface area,compacted density and electrochemical performance.The compacted density of the material was 3.12 g/cm^3,initial specific discharge capacity was 123.4 mAh/g at 1 C in 3.0-4.3 V,the capacity retention of 100 cycles was 96.5%.

关 键 词：高压实密度 锰酸锂(LiMn2O4) 正极材料 助熔剂 

分 类 号：TM912.9[电气工程—电力电子与电力传动]