Electronic Materials Letters , vol. 4, no. 1, pp.9-12, March, 2008

DOI :

Nanoscale Control of Cathode Materials for the Enhanced Cycle-Life Performances

Yuhong Oh, Joon-Gon Lee, Byoungsoo Kim, and Byungwoo Park^*
Seoul National University

Abstract : Metal-phosphate-coated LiCoO₂ cathode materials were studied for the electrochemical properties. Al-P-Ocoated LiCoO₂ exhibited the best cycle-life performance among the examined metal-phosphate-coated LiCoO₂. To investigate the nanostructural effect of AlPO₄-coating layer, three different phases of AlPO₄ nanoparticles were synthesized. The LiCoO₂ thin-film cathodes coated with amorphous AlPO₄ followed by annealing showed the best cycle-life performance, and effectively suppressed the degradation of Li⁺-diffusion kinetics during cycling.

Keyword : Li-battery, LiCoO₂, metal phosphates, nanoscale coating