Abstract
The measurement system with Nuclear-Magnetic-Resonance (NMR) sensor which is able to estimate the current distribution through membrane electrode assembly (MEA) was developed. The magnetic field strength induced by the current through MEA is acquired as the frequency shift of the NMR signal by NMR sensor. It was found that the frequency shift of NMR signal from PEM under water electrolysis condition depended on the current distribution in MEA. In this measurement, two types of MEA with uniform and non-uniform catalyst layer were used to measure the difference of current distributions through them.
