Effect of different carbon conductive additives on electrochemical properties of LiFePO4-C/Li batteries |
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Authors: | Bo Jin Hal-Bon Gu Wanxi Zhang Kyung-Hee Park Guangping Sun |
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Affiliation: | (1) 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: | LiFePO4-C nanoparticles were synthesized by a hydrothermal method and subsequent high-energy ball-milling. Different carbon conductive additives including nanosized acetylene black (AB) and multi-walled carbon nanotube (MWCNT) were used to enhance the electronic conductivity of LiFePO4. The structural and morphological performance of LiFePO4-C nanoparticles was investigated by X-ray diffraction (XRD) and scanning electron microscopy. The electrochemical properties of LiFePO4-C/Li batteries were analyzed by cyclic voltammetry and charge/discharge tests. XRD results demonstrate that LiFePO4-C nanoparticles have an orthorhombic olivine-type structure with a space group of Pnma. LiFePO4-C/Li battery with 5 wt% MWCNT displays the best electrochemical properties with a discharge capacity of 142 mAh g−1 at 0.25 C at room temperature. |
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Keywords: | Olivine Lithium-ion batteries Hydrothermal method Carbon conductive additives High-energy ball-milling |
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