Physicochemical properties of lithium iron phosphate‐carbon as lithium polymer battery cathodes |
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| Authors: | Bo Jin Guangping Sun Jicai Liang Hal‐Bon Gu |
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| Affiliation: | 1. Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering, Jilin University, , Changchun, 130025 China;2. Department of Electrical Engineering, Chonnam National University, , Gwangju, 500‐757 South Korea |
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| Abstract: | Lithium iron phosphate‐carbon (LiFePO4/multiwalled carbon nanotubes (MWCNTs)) composite cathode materials were prepared by a hydrothermal method. In this study, we used MWCNTs as conductive additive. Poly (vinylidene fluoride‐co‐hexafluoropropylene)‐based solid polymer electrolyte (SPE) was applied. The structural and morphological performance of LiFePO4/MWCNTs cathode materials was investigated by X‐ray diffraction and scanning electron microscopy/mapping. The electrochemical properties of Li/SPE/LiFePO4‐MWCNTs coin‐type polymer batteries were analyzed by cyclic voltammetry, ac impedance and galvanostatic charge/discharge tests. Li/SPE/LiFePO4‐MWCNTs polymer battery with 5 wt % MWCNTs demonstrates the highest discharge capacity and stable cyclability at room temperature. It is indicated that LiFePO4‐MWCNTs can be used as the cathode materials for lithium polymer batteries. Copyright © 2011 John Wiley & Sons, Ltd. |
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| Keywords: | Lithium iron phosphate‐carbon solid polymer electrolyte lithium polymer battery |
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