MnO x –Carbon Black-embedded LiFePO 4 (MnO x /C-LFP) as a Cathode Material for High-Power Li-Ion Batteries

Su Jin Kim, Jae Hyun Cho, Kwan Young Lee, Byung Won Cho, Kyung Yoon Chung, Ji Young Kim

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    LiFePO 4 is a promising, cost-effective, and safe material for large-scale energy-storage applications, however its low intrinsic conductivity requires improvement. In order to address this issue, herein, we describe the successful sol-gel synthesis of MnO x –carbon black-embedded LiFePO 4 (MnO x /C-LFP). Bare LiFePO 4 and MnO x /C-LFP composites were characterized by scanning electron and high-resolution transmission electron microscopies, as well as X-ray diffraction, which revealed LiFePO 4 particles embedded in the cross-linked MnO x /C matrix. Electrochemical studies show that the composite has a superior initial discharge capacity of 151.4 mAh/g at 1C, and a good capacity retention of 96.6% after 100 cycles, compared to the bare material (141.2 mAh/g and 92%). The improvement in electrochemical performance is attributed to facile lithium-ion diffusion through MnO x /C nanoparticles on the surface of the LiFePO 4 cathode material. The co-coating of MnO x and carbon black is an effective way of improving the electrochemical kinetics of cathode materials.

    Original languageEnglish
    Pages (from-to)317-323
    Number of pages7
    JournalBulletin of the Korean Chemical Society
    Volume40
    Issue number4
    DOIs
    Publication statusPublished - 2019 Apr

    Bibliographical note

    Funding Information:
    This work was supported by the National Research Foundation of Korea (grant no. NRF-2011-C1AAA001-0030538).

    Funding Information:
    Acknowledgments. This work was supported by the National Research Foundation of Korea (grant no. NRF-2011-C1AAA001-0030538).

    Publisher Copyright:
    © 2019 Korean Chemical Society, Seoul & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

    Keywords

    • Cathode materials
    • High-power Li-ion battery
    • LiFePO
    • MnO –carbon black

    ASJC Scopus subject areas

    • General Chemistry

    Fingerprint

    Dive into the research topics of 'MnO x –Carbon Black-embedded LiFePO 4 (MnO x /C-LFP) as a Cathode Material for High-Power Li-Ion Batteries'. Together they form a unique fingerprint.

    Cite this