Preparation of LiMO_2 (M = Co, Ni) cathode materials for intermediate temperature fuel cells by sol-gel processes

摘要

LiMO_2 (M = Co, Ni) was prepared by complexing sol-gel processes. The and thermal stability were characterized by XRD and TG analyses. LiCoO_2 and LiNiO_2 phases are formed around 400 deg C and 700 deg C respectively in our synthesis process. LiNiO_2 exhibit higher electrical conductivity and better H_2/O_2 fuel cell performance than LiCoO_2 when used as cathode materials. But its thermal stability is relatively poorer than the later at intermediate temperature.