回火处理对0.5Li_2MnO_3-LiNi_(0.5)Mn_(0.5)O_2性能的影响  

Effects of reheating treatment on the performance of 0.5Li_2MnO_3-LiNi_(0.5)Mn_(0.5)O_2

作　　者：钟卓洪 叶乃清[1] 马真[1] 

机构地区：[1]有色金属及材料加工新技术教育部重点实验室,桂林理工大学材料科学与工程学院,广西桂林541004

出　　处：《电池》2012年第3期149-152,共4页Battery Bimonthly

基　　金：广西自然科学基金项目(桂科自0832256);广西研究生教育创新计划项目(2011105960805M16)

摘　　要：以LiNO3、Ni(NO3)2.6H2O、Mn(NO3)2和尿素为原料,用低温燃烧法合成正极材料0.5Li2MnO3-LiNi0.5Mn0.5O2,研究回火处理对产物结构、形貌和电化学性能的影响。回火处理提高了产物的结晶度和电化学性能。回火处理的最佳条件为:在850℃下回火20 h。在此条件下合成的0.5Li2MnO3-LiNi0.5Mn0.5O2的电化学性能良好,以0.1C在2.5～4.6 V循环,放电比容量最高达217.1 mAh/g,第50次循环仍有191.6 mAh/g。Cathode material 0.5Li2Mn03-LiNi0.5Mn0.5O2 was synthesized via low-temperature combustion process using LiN03、Ni（NO3）2·6H2O、Mn（NO3）2 and CO（ NH2）2 as raw materials. The effects of reheating treatment on the structure, morphology and electrochemical performance of the products were investigated. Its crystalline and electrochemical performance were improved by reheating treatment. The optimum reheating conditions were： to reheat at 850 ℃ for 20 h.0.5Li2 MnO3-LiNio.5 Mn0.5 02 syn- thesized under such conditions had fine electrochemical performance. When cycled at 0.1 C in 2.5 - 4.6 V, its specific discharge capacity was up to 217.1 mAh/g and retained 191.6 mAh/g in the 50th cycle.

关 键 词：富锂锰基正极材料 低温燃烧合成 0.5Li2MnO3-LiNi0.5Mn0.5O2 

分 类 号：TM912.9[电气工程—电力电子与电力传动]