DSA (Dimensionally Stable Anode) electrode and manufacturing method thereof

A manufacturing method and electrode technology, applied in the field of electrolysis, can solve the problems of poor bonding between the coating and the substrate, easy peeling and passivation, and high cost, and achieve the effects of reduced thickness, difficult peeling, and moderate grain size

Inactive Publication Date: 2012-07-11
上海太阳能工程技术研究中心有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In the electrolytic copper foil industry, the catalytic coating of the oxygen evolution DSA electrode uses the oxide of the expensive platinum group metal Ir, which has a high cost. In addition, the bonding between the coating and the substrate is not good, and it is easy to fall off and passivate.
These factors become the main obstacles limiting its application

Method used

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  • DSA (Dimensionally Stable Anode) electrode and manufacturing method thereof
  • DSA (Dimensionally Stable Anode) electrode and manufacturing method thereof

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Embodiment Construction

[0031] see figure 1 , the DSA electrode of the present invention is composed of a metal substrate 1 , an intermediate protective layer 2 and a surface active coating 3 . The metal matrix is ​​selected from one of metal Ti, metal Ta or a metal composite material covered with Ta on the surface; the intermediate protective layer is composed of a multi-component compound composed of platinum group metal oxides and other metal oxides; the surface active coating is composed of IrO 2 ·Ta 2 o 5 constitute.

[0032] The preferred composition of the DSA electrode of the present invention is to use metal Ti as the matrix, and use Ta 2 o 5 ·TiO 2 As an intermediate protective layer, IrO 2 ·Ta 2 o 5 As a surface active coating.

[0033] The manufacturing method of the DSA electrode of the present invention, taking the preparation of the DSA electrode for the electrolytic copper foil raw foil machine as an example, the steps are as follows:

[0034] A titanium plate with a length ...

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Abstract

The invention provides a DSA (Dimensionally Stable Anode) electrode and a manufacturing method thereof. The DSA electrode is formed by a metal matrix, a middle protective layer and a surface active coating. The metal matrix is selected from one of metal Ti, metal Ta or a metal composite of which the surface is coated with Ta; the middle protective layer is formed by a multiple compound consisting of a platinum group metal oxide and other metal oxides; and the surface active coating is formed by IrO2.Ta2O5. The manufacturing method of the DSA electrode comprises the steps of treatment of the matrix, preparation of the middle protective layer and preparation of the surface active coating. Compared with a conventional titanium-based platinum group metal oxide coating electrode, the DSA electrode manufactured by adopting the method provided by the invention has the advantages that the average service life is doubled and the oxygen evolution overpotential is reduced by about 5 percent. Particularly, due to the preparation of the middle protective layer, the diffusion of O2 generated inside the surface active coating toward the surface of the Ti matrix is stopped, the passivation effect on the Ti matrix is reduced, the middle protective layer is also tightly combined with the metal matrix and the surface active coating, and the service life of the electrode is greatly prolonged.

Description

technical field [0001] The invention relates to electrolysis technology, in particular to a DSA electrode widely used in the fields of metal electrolysis refining, metal electroplating, electrolytic copper foil industry and other electrolytic industries and a manufacturing method thereof. Background technique [0002] For large-scale production in the electrolysis industry, the key factor determining its production cost is the energy efficiency of electrolysis production. Under a fixed production current, regardless of the secondary reaction in the electrolyzer, its energy efficiency is simply expressed by the following formula: [0003] η = U 1 / U [0004] Where η is the energy efficiency, U 1 is the theoretical decomposition voltage, and U is the actual cell voltage. [0005] It can be seen from the above that reducing the actual cell voltage in the electrolysis process can improve the energy efficiency of electrolysis. Therefore, reducing the overpotential at the ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C7/02C25D17/10
Inventor 李红波张滢清张愿成张玉霞贺珍俊
Owner 上海太阳能工程技术研究中心有限公司
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