SOLID LITHIUM SECONDARY BATTERY AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a cathode layer of a solid lithium secondary battery having an excellent reactivity by controlling orientation of LiCoO2 for preventing (003) plane orientation because of an anisotropy in the ion mobility of LiCoO2 as the cathode material. SOLUTION: In the initial phase of the LiCoO2 film formation, a source material is supplied to a substrate to be coated at the incident angle of 60-90 deg. from a normal line to the substrate, and the lithium cobaltate layer is formed. Thus, an active material having the c-axis of LiCoO2 being inclined at least 60 deg. with respect to the normal line to the substrate is obtained.