正极材料LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2包覆LiNi_(0.8)Co_(0.15)Al_(0.05)O_2的性能  

Performance of cathode material LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 coated LiNi_(0.8)Co_(0.15)Al_(0.05)O_2

作　　者：胡国荣[1] 谭潮溥[1] 杜柯[1] 黄金龙[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《电池》2013年第3期143-146,共4页Battery Bimonthly

摘　　要：以NiSO4.6H2O、CoSO4.7H2O、MnSO4.H2O、NH3.H2O及NaOH为原料,采用共沉淀方法在LiNi0.8Co0.15Al0.05(OH)2球形粒子表面包覆一层Ni1/3Co1/3Mn1/3(OH)2三元材料前驱体,配锂后在750℃下、氧气气氛中焙烧12 h,合成复合层状材料Li[(Ni0.8Co0.15Al0.05)0.97(Ni1/3Co1/3Mn1/3)0.03]O2。复合层状材料具有核壳结构,包覆壳层的厚度约为1μm。复合层状材料在2.8～4.3 V充放电,0.1 C首次放电比容量为188.2 mAh/g;0.2 C循环100次的容量保持率为96.2%;在55℃下以0.2 C循环100次,放电比容量保持在163.2 mAh/g。Quasi-ternary material precursor Nil/3 COl/3 Mn1/3 （OH） 2 was coated on the surface of LiNi0. s Coo. 15 Alo. 05 （OH） 2 spherical by a co-precipitation method using NiSO4 · 6H2 O, CoSO4 · 7 H2 O, MnSO4 ·H2 O, NH3 · H20 and NaOH as raw materials. Composite layered material Li [ （ Ni0. 8 Co0. 15 Al0. 05 ） 0. 97 （ Nil/3 Co1/3 Mn1/3 ） 0. 03 ] O2 was synthesized by sintering at 750 ℃ in oxygen atmosphere after matching lithium. The composite layered material had a core-shell structure, the thickness of the coated shell layer was about 1 txm. When the composite layered material was charged-discharged in 2. 8 - 4. 3 V,its 0. 1 C initial specifie diseharge capaeity was 188.2 mAh/g,the capacity retention after 100 cycles with 0. 2 C was 96. 2% ,when cycled with 0. 2 C at 55 ℃ for 100 times,its specific discharge capacity kept at 163.2 mAh/g.

关 键 词：锂离子电池 正极材料 包覆 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]