Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
Asymmetry in anodic and cathodic polarization profile for LiFePO4 positive electrode in rechargeable Li ion battery
Masanobu NAKAYAMAKaede IIZUKAHiromasa SHIIBAShinji BABAMasayuki NOGAMI
Author information

Volume 119 (2011) Issue 1393 Pages 692-696

Download PDF (1192K) Contact us

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.

Information related to the author
© 2011 The Ceramic Society of Japan
Previous article Next article