Ti / Nb co-doped layered double perovskite type oxygen electrode material and preparation method and application thereof

CN121726431APending Publication Date: 2026-03-24CHINA UNIV OF MINING & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-30
Publication Date
2026-03-24

AI Technical Summary

Technical Problem

When existing cobalt-based perovskite materials are used as oxygen electrodes in proton ceramic batteries, they exhibit low proton conductivity, severe elemental segregation, and high thermal expansion coefficients, resulting in slow reactions, high polarization impedance, and impacting power generation efficiency and long-term stability.

Method used

Ti/Nb co-doped layered double perovskite oxygen electrode material is used. By designing the chemical formula PrBaCo2-x-yTixNbyO5+δ, the proton conductivity is improved, elemental segregation is suppressed, and the coefficient of thermal expansion is reduced. The preparation methods include sol-gel method and calcination treatment.

Benefits of technology

It improves the electrocatalytic activity and operational stability of the oxygen electrode, enhances proton transport capacity, reduces polarization impedance and thermal expansion coefficient, and extends the electrode's service life.

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Abstract

The invention discloses a Ti / Nb co-doped layered double perovskite type oxygen electrode material and a preparation method and application thereof, the chemical general formula of the Ti / Nb co-doped layered double perovskite type oxygen electrode material is PrBaCo < 2-x-y > Ti < x > Nb < y > O < 5 + delta >, x is less than or equal to 0.2, 0 lt; y is less than or equal to 0.2, and delta is oxygen vacancy content. According to the Ti / Nb co-doped layered double perovskite type oxygen electrode material prepared by the method, on the basis of high intrinsic activity of PrBaCo2O5 + delta, through doping of Ti / Nb double elements, the proton conductivity of the oxygen electrode material is improved, element segregation is inhibited, and the thermal expansion coefficient is reduced, so that the oxygen electrode material has high electrocatalytic activity and operation stability.
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Citation Information

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