Asymmetry in anodic and cathodic polarization profile for LiFePO4 positive electrode in rechargeable Li ion battery

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概要

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• Asymmetric kinetics in the electrochemical charge–discharge reaction has been investigated in the two-phase coexistence system at LiFePO4 positive electrodes for rechargeable Li ion batteries. The analyses of the electrochemical polarization profiles obtained by galvanostatic-pulse cycles reveals that nucleation and mass-transport is rate determining process for anodic and cathodic (charge and discharge) reaction, respectively, at high-rate conditions. We suggest that present two-phase system of LiFePO4–FePO4 forms core–shell type construction in each particle or agglomerate of particles, where LiFePO4 prefer to reside at outer shell-region of particles maybe due to smaller interfacial energy with electrolytes.

著者

• Nogami Masayuki

  Department Of Materials Science And Engineering Graduate School Of Engineering Nagoya Institute Of T

• Nakayama Masanobu

  Department Of Applied Chemistry Tokyo Institute Of Technology

• NOGAMI Masayuki

  Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology

• Iizuka Kaede

  Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology

• Shiiba Hiromasa

  Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology

• BABA Shinji

  Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology

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• Asymmetry in anodic and cathodic polarization profile for LiFePO4 positive electrode in rechargeable Li ion battery

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