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Enhanced electrochemical properties of Li[Ni0.5Co0.2Mn0.3]O2 cathode by surface coating using LaF3 and MgF2

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Abstract

LaF3 and MgF2 were introduced for the surface modification of an Li[Ni0.5Co0.2Mn0.3]O2 electrode. The rate capability, cyclic performance, phase stability at a high voltage range, and thermal stability of pristine and coated electrodes were characterized. Surface modification with both coating materials, LaF3 and MgF2, enhanced the rate capability and cyclic performance. The LaF3 and MgF2 coatings also suppressed the structural instability during cycling in the high voltage range (4.8–3.0 V). This implies that both fluoride coating layers successfully protected the Li[Ni0.5Co0.2Mn0.3]O2 electrode from the acidic electrolyte. However, the MgF2 coating improved the thermal stability of the Li[Ni0.5Co0.2Mn0.3]O2 electrode more effectively than the LaF3 coating.

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Acknowledgment

This research was supported by the Converging Research Center Program through the Ministry of Education, Science and Technology (2011K000688).

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Authors and Affiliations

  1. Department of Advanced Materials Engineering, Kyonggi University, San 94-6, Yiui-dong, Yeongtong-gu, Suwon, Gyeonggi-do, 443-760, South Korea

    Han Gab Song, Seuk Buom Kim & Yong Joon Park

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  1. Han Gab Song
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  2. Seuk Buom Kim
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  3. Yong Joon Park
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Correspondence to Yong Joon Park.

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Song, H.G., Kim, S.B. & Park, Y.J. Enhanced electrochemical properties of Li[Ni0.5Co0.2Mn0.3]O2 cathode by surface coating using LaF3 and MgF2 . J Electroceram 29, 163–169 (2012). https://doi.org/10.1007/s10832-012-9747-y

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  • DOI: https://doi.org/10.1007/s10832-012-9747-y

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