Water decomposition device

The water decomposition apparatus with molten hydrate electrolytes and specific electrode materials stabilizes the oxidation reaction, addressing electrode deterioration and maintaining efficient water decomposition.

WO2026115678A1PCT designated stage Publication Date: 2026-06-04NT T INC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
NT T INC
Filing Date
2024-11-28
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

The deterioration of gallium nitride thin films used as oxidation electrodes due to etching reactions during water decomposition reactions reduces the light energy conversion efficiency over time.

Method used

A water decomposition apparatus is designed with an oxidation electrode, a reduction electrode, and an electrolyte containing molten hydrate, where the oxidation electrode is irradiated with light to suppress the etching reaction, using compounds like nitride semiconductors and porous bodies for electrodes, and molten hydrates in the electrolyte to stabilize the reaction.

Benefits of technology

The apparatus effectively suppresses electrode deterioration, allowing stable water decomposition reactions to proceed for a longer duration with increased current flow, enhancing the efficiency and stability of the water decomposition process.

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Abstract

This water decomposition device includes: an oxidation electrode 11; a reduction electrode 12 electrically connected to the oxidation electrode 11; and an electrolytic solution 13 containing a molten hydrate. A decomposition reaction of water proceeds by irradiating the oxidation electrode 11 with light.
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