Lanthanum strontium manganese oxide ceramic film with conductive function and preparation method thereof, titanium-based lanthanum strontium manganese oxide ceramic electrode for flow battery

Abstract

The invention discloses a conductive lanthanum strontium manganese oxide ceramic film and a preparation method thereof, and a titanium-based lanthanum strontium manganese oxide ceramic electrode for a flow battery; the preparation method comprises: (1) using lanthanum salt, strontium salt and manganese salt The mixed sol is the precursor sol, and the gel wet film is formed on the surface of the substrate by dipping and pulling method; (2) the gel wet film is dried to obtain the gel dry film; (3) the gel dry film is subjected to crystallization pretreatment, until the gel dry film is transformed into a lanthanum strontium manganese oxide thin film; (4) finally carry out crystallization heat treatment to obtain a lanthanum strontium manganese oxide ceramic thin film. The titanium-based lanthanum strontium manganese oxide ceramic electrode of the flow battery comprises a titanium substrate and a lanthanum strontium manganese oxide ceramic thin film on the surface. The invention has the advantages of simple preparation process, low preparation cost and little environmental pollution; the prepared conductive film has strong bonding force with the metal substrate, high surface density, good electrochemical corrosion resistance and good conductivity; the preparation process is easy to control and is suitable for industrialization Production.

Description

technical field [0001] The invention belongs to the technical field of preparation of new energy and new materials, and relates to the preparation technology of electrode materials for liquid flow batteries, in particular to a lanthanum strontium manganese oxide ceramic thin film with conductive function and a preparation method thereof, and titanium-based lanthanum strontium manganese for liquid flow batteries Oxygen ceramic electrodes. Background technique [0002] With the continuous development of energy storage, redox flow batteries have attracted more and more attention because of their advantages such as high power, large capacity, long life, safety, environmental protection and controllability. Among them, the electrode material is a key component because it provides an electrochemical reaction site. First of all, the electrode material should have high oxidation resistance and corrosion resistance, so as to ensure the service life of the electrode material; secondl...

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Problems solved by technology

However, its resistivity is relatively high compared to metal materials; and due to the limitation of the preparation process; the uniformity of its conductivity is not as good as that of metal materials, especially for batteries designed with unipolar structures, the uniformity of conductivity of electrode materials is very important; Another metal has incomparable mechanical properties of other materials

Metal electrodes such as Pt, Rh, Ir, etc. have the characteristics of uniform distribution of conductivity on the electrode surface and high electrode reaction efficiency. However, due to severe electrochemical polarization, oxide films are easily formed on the surface, and the electrochemical reversibility of the electrode is poor, and it is also in the anode area. It is easy to form a passivation film, which hinders the continuation of the electrode reaction, and is expensive, which limits its application in flow batteries

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