Monitoring the hydrogen distribution in poly(2,5-benzimidazole)-basedn (ABPBI) membranes in operating high-temperature polymer electrolyte fueln cells by using H-D contrast neutron imaging

摘要

Neutron imaging in combination with the deuterium contrast method was used to analyze the hydrogen distribution and exchange processes in a high-temperature polymer electrolyte fuel cell in-operando. While operating the cell at steady state conditions at 200 mA cm(-2) and lambda(an/ca) = 2/2, changeovers of the anode feed gases between hydrogen (H-2) and deuterium were analyzed by neutron radiography. Proton deuterium exchange times and progresses were studied in-operando. The exchange of proton