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Issue 16, 2016
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An effective approach to improve the electrochemical performance of LiNi0.6Co0.2Mn0.2O2 cathode by an MOF-derived coating

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Abstract

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.

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

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Publication details

The article was received on 31 Dec 2015, accepted on 20 Mar 2016 and first published on 21 Mar 2016


Article type: Communication
DOI: 10.1039/C5TA10773C
Citation: J. Mater. Chem. A, 2016,4, 5823-5827
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    An effective approach to improve the electrochemical performance of LiNi0.6Co0.2Mn0.2O2 cathode by an MOF-derived coating

    S. Li, X. Fu, J. Zhou, Y. Han, P. Qi, X. Gao, X. Feng and B. Wang, J. Mater. Chem. A, 2016, 4, 5823
    DOI: 10.1039/C5TA10773C

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