Anode와 cathode의 함수율 차이 λd를 막 두께로 나눠 함수율 구배로 하고, 식에 의해 확산계수를 계산하였다.
Dividing the moisture content difference λd between the anode and the cathode by the thickness of the film to obtain a moisture content gradient, the diffusion coefficient was calculated by the equation.