Enhanced electrochemical performance of Li-rich layered oxide, Li1.2Mn0.54Co0.13Ni0.13O2, by surface modification derived from a MOF-assisted treatment

被引：26

作者：

Xie, Yuxiang ^{[1
]}

Chen, Shengzhou ^{[1
]}

Lin, Zhuoying ^{[1
]}

Yang, Wei ^{[1
]}

Zou, Hanbo ^{[2
]}

Sun, Raymond Wai-Yin ^{[3
]}

机构：

[1] Guangzhou Univ, Sch Chem & Chem Engn, Guangzhou 510006, Guangdong, Peoples R China

[2] Guangzhou Univ, Guangzhou Key Lab New Energy & Green Catalysis, Guangzhou 510006, Guangdong, Peoples R China

[3] Guangzhou Lee & Man Technol Co Ltd, Guangzhou 510000, Guangdong, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2019年 / 99卷

基金：

中国国家自然科学基金;

关键词：

Lithium-ion battery; Lithium-rich layered oxide material; Surface modification; Fluorine doping; CATHODE MATERIALS; ELECTRODES;

D O I：

10.1016/j.elecom.2019.01.005

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We developed a promising cathode material prepared by effective surface modification of Li-rich layered oxide (LLO) materials, using a Zr-based MOF (UIO-66-F4), as a precursor to produce in-situ MOF-derived ZrO2 (MDZ) coatings. A new method for F doping on LLO was also proposed. The MOF-assisted treatment renders a uniform nanoscale coating of ZrO2 and a porous structure of Li1.2Mn0.54Co0.13Ni0.13O2 hierarchical secondary microsphere. The rate capability, cycling stability, and first coulombic efficiency of LLO were significantly improved by the MOF-assisted treatment. The discharge capacity of the MOF-derived ZrO2 coated LLO (MDZ@ LLO) material was 279 and 110.0 mAh g(-1) at 0.1 degrees C and 5 C, respectively. The capacity retention increased from 71.1% to 83.8% after 200 cycles at 1 degrees C while the coulombic efficiency increased from 62% to 72% during the first cycle.

引用

页码：65 / 70

页数：6

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