2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 9: Physics, Advanced Materials, Multifunctional Materials
| Editors: | Kongoli F, Dubois JM, Gaudry E, Fournee V, Marquis F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 275 pages |
| ISBN: | 978-1-987820-32-4 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Enhancing the Electrochemical Performances of LiNi0.5Mn1.5O4by Doping and Carbon Coating
Hailong Wang1;1NINGXIA UNIVERSITY, Yinchuan, China;
Type of Paper: Regular
Id Paper: 52
Topic: 21
Abstract:
LiNi0.5Mn1.5O4 is a promising cathode for lithium batteries owing to its high operation voltage, however its application is restricted by poor high rate performances. Doping and carbon coating are effective methods to enhance the electrochemical performances. Ru and Co doping have been carried out to improve the conductivities, and enhanced high rate performances have been achieved. High temperature carbon coating on LiNi0.5Mn1.5O4 has been investigated. Scanning/transmission electron microscope (S/TEM)observation shows clear coating layer on the particle's surface; Energy Dispersive X-Ray Spectroscopy (EDX), Raman spectra and Brunauer-Emmett-Teller (BET) tests indicate the amorphous carbon coating layer could be obtained at 800 A°C without using reducing gas or introducing additional low temperature treatments, and the coating layer can significantly increases the BET surface area. The high temperature carbon coating process puts significant influence on the crystal structure in terms of degree of cation ordering and Mn3+ concentration, and eventually the high rate performances.