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

Siwu Li, Xiaotao Fu, Junwen Zhou*, Yuzhen Han, Pengfei Qi, Xing Gao, Xiao Feng, Bo Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

90 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)5823-5827
Number of pages5
JournalJournal of Materials Chemistry A
Volume4
Issue number16
DOIs
Publication statusPublished - 28 Apr 2016

Fingerprint

Dive into the research topics of 'An effective approach to improve the electrochemical performance of LiNi0.6Co0.2Mn0.2O2 cathode by an MOF-derived coating'. Together they form a unique fingerprint.

Cite this