MnOx-carbon black-embedded LiFePO4 (MnOx/C-LFP) as a cathode material for high-power Li-ion batteries
- MnOx-carbon black-embedded LiFePO4 (MnOx/C-LFP) as a cathode material for high-power Li-ion batteries
- 조병원; 정경윤; 김지영; 김수진; 조재현; 이관영
- Issue Date
- Bulletin of the Korean Chemical Society
- VOL 40-323
- LiFePO4 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 MnOx– carbon black-embedded LiFePO4 (MnOx/C-LFP). Bare LiFePO4 and MnOx/C-LFP composites were characterized by scanning electron and high-resolution transmission electron microscopies, as well as X-ray diffraction, which revealed LiFePO4 particles embedded in the cross-linked MnOx/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 MnOx/C nanoparticles on the surface of the LiFePO4 cathode material. The co-coating of MnOx and carbon black is an effective way of improving the electrochemical kinetics of cathode materials.
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