Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 755, Issue -, Pages 47-51Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2015.07.019
Keywords
Lithium-ion batteries; Lithium iron phosphate; Metal tetrabromophthalocyanines; Solvothermal process; Calcination method
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Funding
- National Natural Science Foundation of China [21401149, 21371143]
- National Basic Research Program (973 Program) [2013CB934001]
- Science and Technology plan project of Xi'an City [CXY1438(6)]
- Northwest University [YZZ14050]
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A novel series of cathode materials based on lithium iron phosphate (LiFePO4) for Li-ion batteries are synthesized by comprehensive utilization of solvothermal technique and high temperature calcination method. In this work, metal tetrabromophthalocyanines are utilized to control the structure of LiFePO4 and the electrochemistry of the final products is studied. The composition, structure and morphology characterizations include ICP-AES, XRD, SEM and TEM experiments. Electrochemical performance of each modified material in the Li-ion battery is evaluated by electrochemical measuring technology. The results exhibit that the as-synthesized samples can improve the initial discharge capacity of the Li-ion battery up to 150.7 mAh g(-1) at the rate of 0.1 C. In addition, the most excellent composite can enhance the rate capability of the battery dramatically compared with that of the pristine LiFePO4. (C) 2015 Elsevier B.V. All rights reserved.
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