Method for light-driven reversible hydrogen storage of metal hydrides

By using light to drive reversible hydrogen absorption and desorption cycles of metal hydrides at room temperature, the energy consumption and safety issues of existing hydrogen storage materials under harsh conditions are solved, realizing a reversible hydrogen storage process under mild conditions, which is suitable for large-scale applications.

CN118811771BActive Publication Date: 2026-06-05DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Filing Date
2023-04-20
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing hydrogen storage materials operate under harsh conditions such as high temperature and high hydrogen pressure, resulting in huge energy consumption, high equipment prices, and safety hazards. Furthermore, material costs and capacity limit the commercial application of hydrogen energy.

Method used

A light-driven reversible hydrogen absorption and desorption cycle of metal hydrides is employed at room temperature. The reversible hydrogen storage process of metal hydrides is achieved under light irradiation using specific semiconductor materials, thus avoiding the use of high-temperature heating equipment.

Benefits of technology

A reversible adsorption-dehydrogenation cycle of metal hydrides was achieved under mild conditions. The process is simple, suitable for large-scale scale-up, and has high chemical reactivity.

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Patent Text Reader

Abstract

The application discloses a method for driving metal hydride reversible hydrogen storage by light. The method comprises the following steps: (1) introducing non-active gas into a sealed transparent reactor containing metal hydride powder; (2) applying light to the reactor to remove hydrogen and obtain a dehydrogenation product; (3) hydrogenating the dehydrogenation product in a hydrogen atmosphere to obtain the metal hydride; wherein the metal hydride is selected from at least one of alkali metal hydride, alkaline earth metal hydride and rare earth metal hydride; and the valence of hydrogen in the metal hydride is -1. In the application, the metal hydride can be directly driven by light energy, has high reactivity, and can realize reversible dehydrogenation cycle at normal temperature by using specific hydride, so that the process is simple and suitable for large-scale production.
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