Composite perovskite cathode material and preparation method and application thereof

Through a preparation method of composite perovskite cathode material, the conductivity of PBSCF double perovskite material is improved by using solution impregnation technology and heat treatment technology, the problem of insufficient conductivity in the prior art is solved, and efficient electrochemical performance is achieved.

CN119725574APending Publication Date: 2025-03-28CIVIL AVIATION FLIGHT UNIV OF CHINA
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Patent Information

Application Number
CN202411984762.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The prior art is difficult to improve the conductivity of PBSCF biperovskite materials prepared by solution impregnation technology to obtain LCLaCoO3-δ and LCNLaCo0.6Ni0.4O3-δ.

Method used

By mixing and heating the praseodymium, barium, strontium, cobalt, iron, citric acid, ammonia water and chelating agent, a gel mixture was formed, which was then dried, calcined, dissolved and sintered to obtain PBSCF powder. The metal salt solution containing lanthanum and cobalt is then used for infiltration and heat treatment to form a composite perovskite cathode material.

Benefits of technology

The conductivity of PBSCF dual perovskite material is improved and the electrochemical performance of composite perovskite cathode material is enhanced, so that the maximum power density of the whole battery reaches 800mW/cm2 or above under the temperature of 800℃.

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Abstract

The invention relates to the technical field of electrode material preparation, in particular to a composite perovskite cathode material and a preparation method and application thereof. The preparation method comprises the following steps: mixing and heating a metal source, citric acid, ammonia water and a chelating agent to obtain a gel-state mixture; the gel-state mixture is dried and then roasted, and PBSCF powder is obtained; the PBSCF powder is dissolved, and PBSCF slurry is obtained; covering the surface of the electrolyte with the PBSCF slurry, and sintering to obtain a PBSCF cathode material; and infiltrating the PBSCF cathode material by using a metal salt solution containing lanthanum and cobalt, and then carrying out heat treatment to obtain the composite perovskite cathode material. According to the preparation method, the conductivity of the composite perovskite cathode material can be improved, and the maximum power density of the whole battery can be improved to 800mW / cm < 2 > or above.
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