熔盐
电化学
阴极
煅烧
材料科学
氧化物
锂(药物)
扩散
盐(化学)
化学工程
无机化学
化学
冶金
电极
热力学
催化作用
医学
物理
物理化学
工程类
内分泌学
生物化学
作者
S.J. Shi,J.P. Tu,Y.Y. Tang,Xiaozhao Liu,X.Y. Zhao,Xiuli Wang,Changdong Gu
标识
DOI:10.1016/j.jpowsour.2013.04.125
摘要
Cube-like and plate-like Li[Li0.2Mn0.54Ni0.13Co0.13]O2 particles are obtained after treated in LiCl and KCl molten salts at 800 °C, respectively, comparing to the ball-like original particles calcined in air. The oxide treated in KCl molten salt with large specific area of 17.05 m2 g−1 delivers high discharge capacities of 254.1 mAh g−1 and 168.5 mAh g−1 at current densities of 200 mA g−1 and 2000 mA g−1, respectively. In addition, enhanced cycle stability with capacity retention of 94.9% after 80 cycles at charge–discharge current densities of 200 mA g−1 is obtained for the oxide treated in LiCl molten salt with sacrifice of a little capacity. Such electrochemical performance change is proved to be independent of Li+ diffusion coefficient. It appears that the treatment in molten salts can effectively reform the electrochemical performances of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 cathode materials for various applications.
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