Electrolyte for lithium-oxygen battery and self-catalytic lithium-oxygen battery

By using manganese acetylacetonate as a self-catalyst and redox mediator in lithium-oxygen batteries, the problems of slow kinetics and poor cycle stability of lithium-oxygen batteries were solved, and battery performance with low overpotential and high specific capacity was achieved.

CN119518181BActive Publication Date: 2026-06-12BEIJING NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING NORMAL UNIVERSITY
Filing Date
2025-01-17
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing lithium-oxygen batteries suffer from slow kinetics, high overpotential, and poor cycle stability. Existing additives have failed to fundamentally solve the electronic insulation problem of the positive electrode insulating products.

⚗Method used

Manganese acetylacetonate is used as the positive electrode additive in lithium-oxygen batteries. It is doped into the discharge products as a weak electrolyte to form self-catalytic active sites. As an acetylacetonate in molecular form, it acts as a liquid-phase redox medium to capture the intermediate phase, stabilize superoxide ions, and promote reaction kinetics and cycle stability.

🎯Benefits of technology

It significantly improves the reaction kinetics of lithium-oxygen batteries, achieving low overpotential and long lifespan, cycle stability exceeding 250 cycles, and high specific capacity and fast charging characteristics.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a kind of electrolyte for lithium-oxygen battery and self-catalytic lithium-oxygen battery, the electrolyte for lithium-oxygen battery includes the following components: aprotic solvent, solute is 0.5-2mol / L lithium salt, 0.01-0.1 mol / L acetylacetone manganese;The aprotic solvent includes at least 60vol% dimethyl sulfoxide.In the application, acetylacetone manganese is used as a positive electrolyte additive in Li-O2 battery, which can significantly enhance the reaction kinetics of lithium-oxygen battery, realize low overpotential, and long cycle excellent life, has very high practical value, can become a kind of cheap, high-efficiency metal-oxygen or metal-air battery positive electrode additive, for building high-performance battery system.
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