Li[Ni_(1/3)Mn_(1/3)Co_(1/3)]O_2掺杂Mo研究  

The Study on Mo-Doped Li[Ni_(1/3)Mn_(1/3)Co_(1/3)]O_2

作　　者：王丽琴[1] 焦丽芳[1] 袁华堂[1] 郭建[1] 李海霞[1] 章明[1] 王永梅[1] 

机构地区：[1]南开大学新能源材料化学研究所,天津300071

出　　处：《化学学报》2006年第17期1854-1858,共5页Acta Chimica Sinica

基　　金：国家973项目基础研究基金(No.2002CB211800);天津市自然科学基金资助项目.

摘　　要：采用高温固相合成法制备了Li[Ni(1-x)/3Mn(1-x)/3Co(1-x)/3Mox]O2(x=0,0.005,0.01,0.02).对它们进行了XRD,SEM,循环伏安及充放电容量测试,结果发现,掺杂x=0.01Mo的样品具有较高的嵌锂容量和良好的循环稳定性,在20mA/g放电电流密度和2.3～4.6V的电压范围内具有211.6mAh/g的首次放电比容量,循环50周后放电比容量仍能达到185.9mAh/g,容量损失为12.1%.Layered Li[Ni（1-x）/3Mn（1-x）/3Co（1-x）/3Mox]O2 materials （x=0, 0.005, 0.01, 0.02） were prepared by a solid-state pyrolysis method. Experiments of XRD, SEM, cyclic voltammetry and charge/discharge cycling were carried out. It indicated that when x=0.01, the sample showed the highest first discharge capacity of 211.6 mAh·g^-1 at a current density of 20 mA/g in the voltage range 2.3-4.6 V, and stable cycleability by possessing 185.9 mAh·g^-1 after 50 cycles, and the capacity fade was only 12.1%. The Mo-doped samples exhibited higher discharge capacity and better cycleability at room temperature.

关 键 词：锂电池 MOO3 掺杂 正极材料 

分 类 号：O614.111[理学—无机化学]