All-solid-state metal-air battery

All-solid-state metal-air battery using deliquescent materials to dissolve discharge products

This technology incorporates a deliquescent material into the cathode to adsorb moisture from the air, which dissolves discharge products (such as hydroxides and carbonates) to form an in-situ ion-conductive catholyte. This process reduces charge-discharge polarization and improves reversibility.

Conventional metal-air batteries suffer from performance degradation due to high polarization caused by discharge products (hydroxides, carbonates, etc.) formed by moisture and carbon dioxide in the air, or from long-term operational difficulties due to the chemical instability of liquid electrolytes.

By utilizing an air-stable solid electrolyte and incorporating deliquescent materials (such as NaOH, KOH, or CaCl2) into the cathode to ensure that adsorbed moisture dissolves discharge products, this technology offers a practical solution for developing next-generation cathode materials for lithium secondary batteries.

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Key Features:

• An all-solid-state metal-air battery comprising a cathode in contact with external air and an anode containing metal, positioned at a predetermined distance from the cathode.
• A solid electrolyte positioned between the cathode, which is in contact with external air, and the anode to conduct ions.
• A deliquescent material included in the cathode that adsorbs moisture from the air and dissolves discharge products.
• A configuration in which discharge products are ionized by the water adsorbed by the deliquescent material to form a secondary cathode electrolyte.

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