A Promising Energy Storage System Based on High-Capacity Metal Hydrides

Nikolay E. Galushkin (), Nataliya N. Yazvinskaya and Dmitriy N. Galushkin
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Nikolay E. Galushkin: Laboratory of Electrochemical and Hydrogen Energy, Don State Technical University, 346500 Shakhty, Russia
Nataliya N. Yazvinskaya: Laboratory of Electrochemical and Hydrogen Energy, Don State Technical University, 346500 Shakhty, Russia
Dmitriy N. Galushkin: Laboratory of Electrochemical and Hydrogen Energy, Don State Technical University, 346500 Shakhty, Russia

Energies, 2022, vol. 15, issue 21, 1-12

Abstract: In this paper, based on the study of hydrogen accumulation in the electrodes of nickel–cadmium batteries, a high-capacity hydrogen storage system (HSS) is proposed. It has been experimentally proven that hydrogen accumulates in the electrodes of nickel–cadmium batteries in large quantities over the course of their operation. It has been shown that hydrogen accumulates in metal–ceramic matrices of sintered oxide–nickel electrodes in the form of metal hydrides. The gravimetric capacity of the nickel matrix is 20.3 wt% and the volumetric capacity is 406 kg m −3 . The obtained gravimetric capacities for metal–ceramic matrices exceed almost four times the criteria for onboard hydrogen storage systems established by the US Department of Energy (DOE), as well as previously obtained results for any reversible hydrogen accumulation materials. In addition, in our previous papers, it was proved that if we use thermal runaway for the desorption of hydrogen from metal hydrides then the kinetic and thermodynamic criteria established by the US DOE may be significantly exceeded. Thus, within the framework of the proposed HSS, using the electrochemical method of hydrogen accumulation and the thermal runaway process, one can not only achieve all of the criteria established by the US DOE for HSS but also significantly exceed them.

Keywords: energy storage systems; hydrogen storage; hydrogenation; dehydrogenation; thermal runaway (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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