Patent ID: 11925922
Assignee: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 5:
6. The method of claim 5, wherein the oxygen reduction catalyst coating step comprises:
a mixture solution preparation step of preparing a mixture solution by adding the (M)-N—C-based catalyst powder to the mixed solution of isopropyl alcohol (IPA) and Nafion;
an ultrasonic dispersion step of uniformly dispersing the (M)-N—C-based catalyst powder by applying ultrasonic waves to the mixture solution prepared in the mixture solution preparation step;
an application step of applying a predetermined amount of the dispersed mixture solution, in which the (M)-N—C-based catalyst powder has been uniformly dispersed through the ultrasonic dispersion step, at least once to the metal substrate surface; and
a coating layer forming step of forming the coating layer by drying the applied dispersed mixture solution.