CAJ | 학술논문

以六水合硝酸镍、硝酸钴和二氧化锰为原料,以柠檬酸为分散剂和燃料,采用球磨工艺对原料进行混合,在950℃于空气气氛中保温10 h制备了层状结构的LiCo_(1/3)Mn_(1/3)Ni_(1/3)O_2正极材料.通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)和电化学性能测试手段对所制备材料的结构、形貌及电化学性能进行表征.结果表明:所合成的材料为单相的六方层状结构,颗粒大小均匀.在2.75～4.3 V电压区间,以0.1 C恒电流充放电,首次充/放电比容量为184.3/156.7mAh/g,充/放电效率为85%.0.5 C倍率下充放电,材料首次放电比容量为151.3 mAh/g,经过30次循环后比容量保持在1 50.8 mAh/g左右,循环性能优异.
이륙수합초산얼、초산고화이양화맹위원료,이저몽산위분산제화연료,채용구마공예대원료진행혼합,재950℃우공기기분중보온10 h제비료층상결구적LiCo_(1/3)Mn_(1/3)Ni_(1/3)O_2정겁재료.통과X사선연사의(XRD)、소묘전자현미경(SEM)화전화학성능측시수단대소제비재료적결구、형모급전화학성능진행표정.결과표명:소합성적재료위단상적륙방층상결구,과립대소균균.재2.75～4.3 V전압구간,이0.1 C항전류충방전,수차충/방전비용량위184.3/156.7mAh/g,충/방전효솔위85%.0.5 C배솔하충방전,재료수차방전비용량위151.3 mAh/g,경과30차순배후비용량보지재1 50.8 mAh/g좌우,순배성능우이.
The layered LiCo_(1/3)Mn_(1/3)Ni_(1/3)O_2 cathode materials with hexagonal structure were successfully synthesized by combustion method followed with sintering 950 ℃ for 10 h in air.The samples were characterized by XRD,SEM and electrochemical test.The results show that the uniform crystallites of LiCo_(1/3)Mn_(1/3)Ni_(1/3)O_2 are obtained.The initial charge and discharge capacities are 184.3/156.7 mAh/g at 0.1 C between 2.75 V and 4.3 V.The initial discharge capacity is 151.3 mAh/g at 0.5 C.After 30 cycles,the discharge capacity is 150.8 mAh/g,which shows good cycling stability.