Journal
ELECTROCHEMICAL AND SOLID STATE LETTERS
Volume 14, Issue 1, Pages A1-A5Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.3496402
Keywords
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Funding
- Beijing Natural Science Foundation [2093031]
- Beijing Municipal Education Commission [JX005012201001]
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Li-rich layered cathode material Li[Li0.2Ni0.2Mn0.6]O-2 was modified by manganese oxide coating via a simple deposition and heat-treatment process. The HRTEM images and the XPS analysis demonstrated that the surface of Li[Li0.2Ni0.2Mn0.6]O-2 was covered by continuous manganese oxide layer, with about 10 nm thickness. The electrochemical performance is improved greatly, especially the rate capability. The composite coated with 4 wt % manganese oxide showed high reversible capacity of 210 mAh g(-1) after 50 cycles at 2 C (400 mA g(-1)), compared with 77 mAh g(-1) of the pristine. It is believed that surface modification of Li[Li0.2Ni0.2Mn0.6]O-2 with manganese oxide coating exhibits a convenient approach for a large-scale production. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3496402] All rights reserved.
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