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Electrochemical performance of surface modified CNF/Co3O4 composite for Li-air batteries

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Abstract

This article describes the electrochemical performance of an air electrode employing a CNF/Co3O4 composite. A polydopamine layer was coated on the surface of the composite to increase its wettability toward the electrolyte used. In addition, a dissolved catalyst (LiI) was introduced to facilitate the dissociation of reaction products. The polydopamine-coated CNF/Co3O4 composite showed better charge capacity and cyclic performance than a pristine CNF/Co3O4 composite. Moreover, the use of LiI effectively decreased the overpotential and increased the cyclic performance of Li-air cells. Thus, the combined use of a polydopamine-coated CNF/Co3O4 composite and a dissolved catalyst (LiI) was very effective for enhancing the electrochemical properties of Li-air cells.

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Acknowledgments

This work was supported by Kyonggi University Research Grant 2012

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Authors and Affiliations

  1. Department of Advanced Materials Engineering, Kyonggi University, Suwon, Gyeonggi-do, 443-760, Republic of Korea

    Dae Sik Kim & Seuk Buom Kim

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  1. Dae Sik Kim
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  2. Seuk Buom Kim
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Correspondence to Seuk Buom Kim.

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Kim, D.S., Kim, S.B. Electrochemical performance of surface modified CNF/Co3O4 composite for Li-air batteries. J Electroceram 33, 246–251 (2014). https://doi.org/10.1007/s10832-014-9957-6

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