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 journalArticle

1 Citation (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 1

Keywords

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

ASJC Scopus subject areas

  • Chemistry(all)

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