Electrochemical properties of carbon-mixed LiFePO4 cathode material synthesized by the ceramic granulation method |
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Authors: | Shaohua Luo Zilong Tang Junbiao Lu Zhongtai Zhang |
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Affiliation: | 1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;2. Department of Materials Science and Engineering, Northeastern University at Qinhuangdao Branch, Qinhuangdao, 066004, China |
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Abstract: | LiFePO4/carbon composite cathode material was prepared using polyvinyl alcohol (PVA) as carbon source by pelleting and subsequent pyrolysis in N2. The samples were characterized by XRD, SEM and TGA. Their electrochemical performance was investigated in terms of charge–discharge cycling behavior. It consists of a single LiFePO4 phase and amorphous carbon. The special micro-morphology via the process is favorable for electrochemical properties. The discharge capacity of the LiFePO4/C composite was 145 mAh/g, closer to the theoretical specific capacity of 170 mAh/g at 0.1 C low current density. At 3 C modest current density, the specific capacity was about 80 mAh/g, which can satisfy for transportation applications if having a more planar discharge flat. |
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Keywords: | Lithium-ion batteries Cathode material Carbon mixed LiFePO4 Spray-pelleting |
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