Improvement in Electrochemical Performance of LiCoPO₄/C Using Furnace Blacks with High Surface Areas as a Carbon-based Composite Material

Abstract

LiCoPO₄-carbon composites (LiCoPO₄/C) were synthesized via a solid state reaction with a new furnace black, CB1, which was developed by Asahi Carbon Co., Ltd. The CB1 used here has superiority physico-chemical properties, e.g., ultrafine particle sizes, high specific surface areas, and high “structure”, the degree of linkage among carbon particles. The particle growth of LiCoPO₄ was suppressed by the addition of CB1 to the LiCoPO₄ precursors and then followed by calcination. CB1 was dispersed among LiCoPO₄/C particles successfully to form conductive paths. Consequently, a high electrochemical capacity was achieved in aid of the presence of CB1.