|About this Abstract
||Materials Science & Technology 2011
||MS&T'11 Poster Session
||096 Structure Characterization and Electrochemical Performance of LiFePO4/Carbon Hybrid for Li-Battery Cathode Materials
||Yuki Matsuda, Masahiko Miyahara, Hirokazu Sasaki, Atsushi Nemoto, Maki Moriya, Hiroshi Okamura, Shingo Katayama, Yuji Akimoto, Shin-ich Hirano
|On-Site Speaker (Planned)
LiFePO4 has been receiving attentions as a promising cathode material for rechargeable lithium ion batteries. In practical use, the carbon-coating LiFePO4 particles modified for the improvement of the poor electronic conductivity of LiFePO4. However, the ability of LiFePO4 for a cathode material depends on a design of a hybrid texture of carbon and LiFePO4 particles. This paper proposes a noble hybrid texture of LiFePO4 particle with carbon nano-coated film and carbon nano-channel from surface as well, resulting in a high capacity of 165 mAh/g and an excellent cycling performance with no capacity loss at least after 50 cycles. In addition, the hybrid texture of LiFePO4 and carbon was characterized by SEM, HRTEM, Raman, IR, XANES, EXAFS, and ESR. The change in crystal structure between charged and discharged LiFePO4 was confirmed by analyses of XRD, XANES and EXAFS. The stability of the crystal structure after full-charged/discharged cycles was also confirmed.