期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 617, 期 -, 页码 154-159出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.07.200
关键词
LiFe1/3Mn1/3Co1/3PO4; Nanocomposite; Microwave assist; Cathode material; Lithium-ion battery
资金
- 863 Program [2012AA111401]
- Natural Science Foundation of Jiangsu Province [BK2012293, BK20130482]
- University Natural Science Research Project of Jiangsu Province [13KJB430008]
- Research Foundation for Advanced Talents of Jiangsu University in China [13JDG071, 12JDG054]
A microwave assisted method is developed for synthesizing pure LiFe1/3Mn1/3Co1/3PO4 and LiFe1/3Mn1/3Co1/3PO4/C nanocomposite. Olivine LiFe1/3Mn1/3Co1/3PO4 coated with uniform amorphous carbon film of similar to 5 nm in thickness with an average size of similar to 200 nm is successfully obtained. Compared with pure LiFe1/3Mn1/3Co1/3PO4, LiFe1/3Mn1/3Co1/3PO4/C composite presents enhanced electrochemical Li-ion intercalation performances. It exhibits a high discharge capacity of 169 mA h g(-1) at 0.1 C (theoretical capacity is 170 mA h g(-1)). The capacity retention is 99% after 30 cycles. Furthermore, the capacities are still retained 101 at 5 C and 76 mA h g(-1) and 20 C, respectively. Carbon coating can significantly improve the Li-ion diffusion, the reversibility of lithium extraction/insertion and electrical conductivity of LiFe1/3Mn1/3Co1/3PO4. (C) 2014 Elsevier B.V. All rights reserved.
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