An effective approach to improve the electrochemical performance of LiNi0.6Co0.2Mn0.2O2 cathode by an MOF-derived coating

被引：92

作者：

Li, Siwu ^{[1
]}

Fu, Xiaotao ^{[1
]}

Zhou, Junwen ^{[1
]}

Han, Yuzhen ^{[1
]}

Qi, Pengfei ^{[1
]}

Gao, Xing ^{[1
]}

Feng, Xiao ^{[1
]}

Wang, Bo ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Chem, Minist Educ China, Key Lab Cluster Sci,Beijing Key Lab Photoelect El, Beijing 100081, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2016年 / 4卷 / 16期

基金：

中国国家自然科学基金;

关键词：

LITHIUM-ION BATTERIES; METAL-ORGANIC FRAMEWORK; LINI0.8CO0.2O2; CATHODE; NICKEL-RICH; SURFACE; LICOO2; CARBON; ELECTRODES; NANOCOMPOSITES; DEPOSITION;

D O I：

10.1039/c5ta10773c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Herein, we report an effective surface modification for a high energy cathode material, LiNi0.6Co0.2Mn0.2O2 (NCM-622), using an Al-based MOF (NH2-MIL-53), as a precursor to produce MOF-derived alumina (MDA) coatings. The MDA-coating (2.5 wt%) is well-dispersed on the surface of NCM-622 with an amorphous structure. By virtue of the MDA-coating, NCM-622 shows greatly enhanced electrochemical performance: 214.6 mA h g(-1) and 196.5 mA h g(-1) (3.0-4.5 V vs. Li+/Li) at 0.2C and 1C, respectively, with a capacity retention of 92.7% after 100 cycles at 1C; even at high rates of 5C and 10C, the discharge capacity still approaches 168.5 mA h g(-1) and 150.0 mA h g(-1), respectively. We found that these enhancements can be ascribed to the improved structural stability and electrochemical kinetics of NCM-622 by the MDA-coating.

引用

页码：5823 / 5827

页数：5

共 46 条

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