摘要
以氢氧化锂、电解超细二氧化锰为原料 ,在不同条件下用溶胶 -泥浆法制备了尖晶石型L i Mn2 O4,优化了反应条件并以此作正极材料进行了电化学测试。结果表明 ,首次充电比容量达 1 2 5m Ah· g- 1 ～ 1 45 m Ah· g- 1 ,放电比容量达 1 1 5 m Ah· g- 1 ～ 1 2 5 m Ah· g- 1 ,可逆充放电效率在 90 %以上 ,循环 2 8次后其充电比容量仍然保持在 1 1 0 m Ah· g- 1～ 1 1 5 m Ah· g- 1 ,放电比容量达 1 1 0 m Ah· g- 1左右 ,可逆充放电效率在 95 %以上。
The spinel LiMn_2O_4 cathode materials were synthesized by sol.slurry method with calculated amounts of LiOH·H_2O and MnO_2(EMD) and the synthesis condition(f.e tempreture, hours) was determined. The results of electrochemical test demonstrated that these new materials exhibited excellent electrochemical properties. Its initial capacity reached 125mAh·g^-1 ~145mAh·g^-1 and reversible efficiency is about 90%. After 28 cycles, its capacity was still around 110mAh·g^-1 ~115mAh·g^-1 with above 95% reversible efficiency. [KH-2]
出处
《合成化学》
CAS
CSCD
2000年第5期377-380,共4页
Chinese Journal of Synthetic Chemistry
关键词
锂离子电池
尖晶石LIMN2O4
正极材料
制备
Sol.slurry method, LiOH·H_2O, MnO_2, Spinel LiMn_2O_4, Cathode materials, Synthesis, Electrochemistry.
