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Improved of cathode performance of LiFePO4/C composite using different carboxylic acids as carbon sources for lithium-ion batteries

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Abstract

Among the several materials under development for use as a cathodes in lithium-ion batteries olivine-type LiFePO4 is one of the most promising cathode material. However, its poor conductivity and low lithium-ion diffusion limits its practical application. In this study, we report seven different carboxylic acids used to synthesize LiFePO4/C composite, and influences of carbon sources on electrochemical performance were intensively studied. The structure and electrochemical properties of the LiFePO4/C were characterized by X-ray diffraction, scanning electron microscopy, electrical conductivity, and galvanostatic charge–discharge measurements. Among the materials studied, the sample E with tartaric acid as carbon source exhibited the best cell performance with a maximum discharge capacity of 160 mAh g−1 at a 0.1 C-rate. The improved electrochemical properties were attributed to the reduced particle size and enhanced electrical contacts by carbon.

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Acknowledgments

This study was financially supported by the Research Foundation of Erciyes University (Kayseri, Turkey). The authors thank Mr. Ihsan Aksit for the SEM observation. Thanks are also to Mr. M. Nurullah Ateş for his cooperation.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Art and Science, Erciyes University, 38039, Kayseri, Turkey

    Hüseyin Göktepe, Halil Şahan, Fatma Kılıç & Şaban Patat

Authors
  1. Hüseyin Göktepe
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  2. Halil Şahan
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  3. Fatma Kılıç
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  4. Şaban Patat
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Correspondence to Hüseyin Göktepe.

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Göktepe, H., Şahan, H., Kılıç, F. et al. Improved of cathode performance of LiFePO4/C composite using different carboxylic acids as carbon sources for lithium-ion batteries. Ionics 16, 203–208 (2010). https://doi.org/10.1007/s11581-009-0382-9

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  • DOI: https://doi.org/10.1007/s11581-009-0382-9

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