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.
|Number of pages||7|
|Journal||Bulletin of the Korean Chemical Society|
|Publication status||Published - 2019 Apr|
- Cathode materials
- High-power Li-ion battery
- MnO –carbon black
ASJC Scopus subject areas