Current distribution measurements in a PEFC with net flow geometry

• A measurement system for current distribution mapping for a PEFC has been developed. The segmented anode is constructed so as to have high thermal conductivity in order to prevent the formation of large temperature gradients between the electrodes. The construction is therefore feasible for use at high current densities. Both segmented and unsegmented gas diffusion layers are used. The effect of inlet humidification and gas composition at the cathode side is studied. In addition, two different flow geometries are studied. The results show that the measurement system is able to distinguish between current distribution originating from differences in proton conductivity, species concentration and gas diffusion layer properties.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Kemiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Chemical Engineering (hsv//eng)

Nyckelord

current distribution

net flow geometry

PEFC

segmented current collector

membrane-electrode assemblies

methanol fuel-cell

gas-evolving cell

water transport

mass-transfer

pemfc

behavior

channel

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)