混合金属氧化物掺杂对锰酸锂性能的影响研究  

A Study on the Effect of Mixed Metal Oxide Doping on the Properties of Lithium Manganates

作　　者：李海亮 詹海青 闫冠杰 吴继相 杨英全 李华成 LI Hailiang;ZHAN Haiqing;YAN Guanjie;WU Jixiang;YANG Yingquan;LI Huacheng(Guangxi Nanmeng International New Energy Technology Co.,Ltd.,Chongzuo,Guangxi 532200,China;Southern Manganese Industry Group Co.,Ltd.,Nanning,Guangxi 530029,China)

机构地区：[1]广西南锰国际新能源科技有限责任公司,广西崇左532200 [2]南方锰业集团有限责任公司,广西南宁530029

出　　处：《中国锰业》2024年第2期22-26,共5页China Manganese Industry

摘　　要：以低钠钾型二氧化锰、碳酸锂为原料,以不同量纳米三氧化二铝、二氧化钛为添加剂,采用高温固相法制备电池正极材料锰酸锂,研究混合金属氧化物添加量对锰酸锂的物理性能及电性能的影响。通过粒度分布、振实密度、微观结构、容量及容量衰减对材料性能进行表征。结果表明,纳米三氧化二铝掺杂量为0.3%和二氧化钛掺杂量为0.5%的条件下合成的锰酸锂材料0.5 C容量为98.2 mAh/g和1.0 C容量为97.9 mAh/g,50次高温循环容量保持率为98.37%,该产品具有高温循环性能优良,对锰酸锂的生产具有一定参考意义。Low sodium potassium manganese dioxide and lithium carbonate were used as raw materials.Different amounts of nano aluminum oxide and titanium dioxide were used as additives to prepare battery cathode material lithium manganese oxide by high-temperature solid-phase method.The effect of mixed metal oxide addition on the physical and electrical properties of lithium manganese oxide was studied.It characterizes material properties through particle size distribution,including the compacted density,microstructure,capacity and capacity decay.The results show that the lithium manganese oxide material is synthesized under the conditions of 0.3%nano aluminum oxide doping and 0.5%titanium dioxide doping had a 0.5 C capacity of 98.2 mAh/g and a 1.0 C capacity of 97.9 mAh/g with a capacity retention rate of 98.37%after 50 high-temperature cycles.This product has excellent high-temperature cycling performance and it is of certain reference significance for the production of lithium manganese oxide.

关 键 词：低钠钾型二氧化锰 混合金属氧化物 锰酸锂 高温循环性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]