期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 19, 期 5, 页码 1535-1540出版社
SPRINGER
DOI: 10.1007/s10008-014-2683-9
关键词
Carbon coating; Olivine; Iron doping; Lithium-ion batteries
资金
- National Natural Science Foundation of China [21071060]
- Research Foundation for Doctors of Luoyang Institute of Science and Technology [2013BZ08]
A porous LiFe0.4Mn0.6PO4/C composite was prepared via a simple carbon gel-combustion synthesis process. The obtained product possessed higher surface area, abundant mesopore structure, the improved kinetics and electronic conductivity by doping with Fe2+ and coating with carbon, respectively. As a cathode material for lithium-ion batteries, the as-prepared LiFe0.4Mn0.6PO4/C composite showed outstanding rate capacities and cycling performances at high charge/discharge rates. The discharge capacity of LiFe0.4Mn0.6PO4/C was as high as 121.1 mAh g(-1) in the first cycle at 0.5 C and remained 103.8 mAh g(-1) after 50 cycles. Even at higher rate of 10 C, the initial discharge capacity of the electrode exhibited 64.6 mAh g(-1), and the sample electrode delivered capacity retention of 83.3 % after 1000 cycles. The improved electrochemical properties of the LiFe0.4Mn0.6PO4/C electrode materials suggest the applications of the sample in high power lithium-ion batteries.
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