Al@(TiB2+Ti4O7)-PbO2 anode plate with core-shell-like structure and preparation method of Al@(TiB2+Ti4O7)-PbO2 anode plate

Abstract

The invention discloses a Al@(TiB2+Ti4O7)-PbO2 anode plate with a core-shell-like structure and a preparation method of the Al@(TiB2+Ti4O7)-PbO2 anode plate, and belongs to the technical field of wetmetallurgy and electrochemical metallurgy. The Al@(TiB2+Ti4O7)-PbO2 anode plate mainly comprises an Al metal plate carrier, a TiB2+Ti4O7 ceramic intermediate transition layer and a PbO2 active catalytic layer. The method comprises the following steps of: firstly, preparing TiB2+Ti4O7 mixed ceramic powder; then pre-spraying a NiAl base coat on the Al plate subjected to surface roughening etching, and praying the TiB2+Ti4O7 ceramic intermediate transition layer to prepare an Al@(TiB2+Ti4O7) electrode substrate with the core-shell-like structure; and finally carrying out electro-deposition of thePbO2 active catalytic layer on the surface of the substrate by adopting an electro-deposition method. The anode plate prepared by the method has the advantages of high catalytic activity, low cost, long service life, wide adaptability and the like.

Description

technical field [0001] The invention relates to a type of core-shell structure Al@(TiB 2 +Ti 4 o 7 )-PbO 2 The anode plate and its preparation method belong to the technical field of hydrometallurgy and electrochemical metallurgy. Background technique [0002] Non-ferrous metals have become an important material foundation that determines the development of a country's economy, science and technology, and national defense construction, as well as a key strategic resource for enhancing the country's comprehensive strength and ensuring national security. In today's non-ferrous metal industry, with the continuous decline in the quality of metal ores, hydrometallurgy is becoming one of the main methods of non-ferrous metal extraction with its unique advantages, and hydrometallurgy itself also has its own impact on energy, environment and It consumes a lot of resources, so it has attracted much attention. At present, the industrialized large-scale extraction and production o...

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Problems solved by technology

[0005] The patent application "An Aluminum Matrix Composite Ceramic Coated Electrode Plate and Its Preparation Method" discloses Al / TiB 2 +Ti 4 o 7 The preparation method of the matrix electrode, although the electrode has good conductivity and corrosion resistance, but because the original powder prepared by this method is only prepared by mixing powder with a simple mixer, the composition uniformity and powder fluidity still need to be improved. And the outermost layer is free of PbO 2 Active catalytic layer, so its oxygen evolution potential is relatively high; the patent "Aluminum-based composite anode for nickel electrowinning and its preparation method" (Zhou Shenggang, Luo Kailiang, Xu Yang...) discloses Al / TiB 2 / PbO 2 The preparation method of the electrode, which has the advantages of low cell voltage and high current efficiency, but due to the Al metal matrix and TiB 2 Due to the inherent differences in the ceramic itself, such as excessive differences in thermal expansion coefficients, cracks are likely to occur at the electrode interface, so that the coating and active catalytic layer are easy to fall off and fail. At the same time, the electrode does not add highly conductive materials such as Ti 4 o 7 etc., so its resistance is higher

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