Long-term cyclability of LiFePO4/carbon composite cathode material for lithium-ion battery applications |
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| Authors: | Jing Liu Jiawei Wang Xuedong Yan Xianfa Zhang Guiling Yang Abraham F Jalbout Rongshun Wang |
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| Affiliation: | aInstitute of Functional Materials, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, PR China;bLIB Engineering Laboratory, Materials Science and Technology Center, Changchun, Jilin 130024, PR China;cInstituto de Química, Universidad Nacional Autónoma de México, México D.F., Mexico |
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| Abstract: | A simple high-energy ball milling combined with spray-drying method has been developed to synthesize LiFePO4/carbon composite. This material delivers an improved tap density of 1.3 g/cm3 and a high electronic conductivity of 10−2 to 10−3 S/cm. The electrochemical performance, which is especially notable for its high-rate performance, is excellent. The discharge capacities are as high as 109 mAh/g at the current density of 1100 mA/g (about 6.5C rate) and 94 mAh/g at the current density of 1900 mA/g (about 11C rate). At the high current density of 1700 mA/g (10C rate), it exhibits a long-term cyclability, retaining over 92% of its original discharge capacity beyond 2400 cycles. Therefore, the as-prepared LiFePO4/carbon composite cathode material is capable of such large-scale applications as hybrid and plug-in hybrid electric vehicles. |
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| Keywords: | Lithium-ion batteries LiFePO4/carbon composite Long-term cyclability High-rate performance Large-scale application |
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