Study of degradation of membrane-electrode assemblies of hydrogen-oxygen (air) fuel cell under the conditions of life tests and voltage cycling

Avakov, V. B.; Алиев, А. Д.; Бекетаева, Л. А.; Bogdanovskaya, V. A.; Burkovskii, E. V.; Datskevich, A. A.; Ivanitskii, B. A.; Kazanskii, L. P.; Kapustin, A. V.; Корчагин, О. В.; Kuzov, A. V.; Landgraf, I. K.; Lozovaya, O. V.; Модестов, А. Д.; Stankevich, M. M.; Тарасевич, М. Р.; Чалых, А. Е.

doi:10.1134/s1023193514080011

Cited by 16 publications

(14 citation statements)

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“…2a). This segment corre sponds to kinetic regime of current generation; it was used in the determining of the exchange current of the oxygen reaction as we described earlier [38]. The results obtained evidence some decrease in the mass activity and negative potential shift at a constant cur rent density.…”

Section: Long Term Testsmentioning

confidence: 91%

“…During the long term tests we measured current-voltage curves over wide voltage range, aiming at evaluating the reaction rate decay under kinetic control and increase in transport limita tions at a current density of 0.5 A/cm 2 . We also mea sured hydrogen adsorption curves for the anode and cathode, to evaluate the platinum surface area change in accord with the procedure described in [38].…”

Section: Long Term Testsmentioning

confidence: 99%

“…The hydrogen-air FC MEAs forming methods were described at length in [38][39][40]; the optimization principles for the cathode and full MEA architecture were also given. The cathode active layer is made of the Jonsson&Mattej HiSPEC 13100 (70% Pt/C) pure platinum catalyst; the anode active layer, of the HiSPEC 4000 (40% Pt/C) platinum catalyst.…”

Section: The Meas: Their Formation and Compositionmentioning

confidence: 99%

“…After the long term testing, as well, as accelerated stress testing, we studied the MEA components with a complex of structural methods, including X ray dif fraction (XRD), X ray photoelectron spectroscopy (XPS), atomic absorption analysis, and by microtomy with subsequent X ray analysis [38].…”

Section: Structural Studiesmentioning

confidence: 99%

“…In our preceding works [38][39][40] we studied degra dation processes in hydrogen-air FC MEAs under the accelerated stress testing by using voltage cycling. We developed algorithms for the MEA state examina tion using electrochemical and structural methods; the principal reasons of degradation were revealed.…”

Section: Introductionmentioning

confidence: 99%

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Lifetime prediction for the hydrogen–air fuel cells

et al. 2015

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Degrading of membrane-electrode assemblies of hydrogen-air fuel cells during their long term and accelerated stress testing is analyzed by complex of electrochemical and structural methods. In both test ing types, the principal degrading factor is the cathode catalyst destruction accompanied by the active surface loss due to the platinum oxidation, its particles' coarsening, and platinum ion transfer to polymer electrolyte. The approach to membrane-electrode assembly state evaluation during the long term testing on basis of the accelerated stress testing is validated. A method of the lifetime prediction for fuel cells operating in various conditions, differing in temperature, current load and regime, as well, as the membrane-electrode assembly architecture, is suggested.

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Section: Long Term Testsmentioning

confidence: 91%

Section: Long Term Testsmentioning

confidence: 99%