TY  - JOUR
AU  - Kulikovsky, Andrei
TI  - Hydrogen crossover impedance of a PEM fuel cell at open circuit
JO  - Electrochimica acta
VL  - 247
SN  - 0013-4686
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2017-06859
SP  - 730 - 735
PY  - 2017
AB  - We report a physics–based model for impedance due to hydrogen crossover in a PEM fuel cell at open circuit. The model takes into account conversion of hydrogen flux to protons in the cathode catalyst layer (CCL). Transient equations for the proton current conservation and for the hydrogen transport in the CCL are formulated and an analytical expression for the impedance due to hydrogen oxidation is derived. This impedance is summed with the impedance due to conversion of the proton current into water derived previously, and the resulting model impedance is fitted to experimental data. Fitting gives an estimate of the hydrogen diffusion coefficient in the CCL D$_{hy}$ ≃ 10$^{−3}$ cm$^{2}$ s$^{−1}$.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000408582300077
DO  - DOI:10.1016/j.electacta.2017.07.004
UR  - https://juser.fz-juelich.de/record/838185
ER  -