The preparation and characterization of olivine LiFePO4/C doped with MoO3 by a solution method |
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| Affiliation: | 1. Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China;2. State key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;3. The Equipment Research Institute of the General Logistic Department of the Chinese People''s Liberation Army, Beijing 100010, China |
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| Abstract: | Composite Li0.99Mo0.01FePO4/C cathode materials were prepared by an easy solution method followed by heat-treating at various temperatures. XRD, SEM, TGA/DTA, EA, CV, XPS and charge–discharge cycles were used to evaluate the Li0.99Mo0.01FePO4/C composite powders. The results indicate that mix-doping method does not affect the olivine structure of the cathode but considerably improves its capacity delivery and cycle performance. Among the prepared cathode materials, the sample heat-treated at 700 °C for 12 h shows best electrochemical performances. It shows initial specific discharge capacities of 161 and 124 mAh g− 1 with C rates of 0.2C and 2C, respectively, which is ascribed to the enhancement of the electronic conductivity by ion doping and carbon coating. |
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