Electrochemical Hydrogen Storage In Amine-Activated Polydopamine
ADVANCED SUSTAINABLE SYSTEMS(2021)
Abstract
Electrochemical hydrogen storage combines the evolution, oxidation, and storage of hydrides from aqueous electrolytes and ionic liquids, but presently requires palladium or rare-earth metals to achieve significant power capacities. Here hydrogen electrosorption in amine-activated polydopamine is shown. The organic heterogeneous amine-hydride yields a gravimetric hydrogen density of 0.44%, corresponding to a 80% hydride-per-monomer content, and offers similar reaction kinetics as for palladium and related systems. An initial stability test of 100 electrosorption cycles that demonstrates resilience in acidic media with a tendency for increased capacity over time is included. In situ vibronic amine-hydride fingerprints corroborate the reversibility and stability of the conversion process and highlight the merits of amine-activated polydopamines as a heterogeneous organic hydrogen storage system.
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Key words
amine-hydride, conducting polymers, electrochemical hydrogen storage, hydrogen electrosorption, polydopamine
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