Porous nickel electrode and preparation method thereof

Abstract

The invention discloses a porous nickel electrode and a preparation method thereof. The porous nickel electrode comprises a base body; the base body is made of nickel-based nano amorphous alloy, the surface of the base body is covered with an electrode layer, the electrode layer comprises nano porous nickel, the electrode is in a sheet shape, the surface of the electrode is in a net shape, and the electrode base body is purified through a metal electromigration loading technology; an electrode base body is pretreated, and cleaning of the surface of the electrode base body is completed; nano-porous nickel is prepared, firstly, a nickel alloy is smelted, the prepared nickel alloy is selectively corroded through a dealloying process, and the nano-porous nickel alloy is obtained after the corrosion is completed; and the alloy is pressed into a thin strip according to the size requirement, and the thin strip is cut into sections; and the real surface area of the nano-porous nickel is far larger than the apparent area, so that the contact area between an electrolyte and an electrode material can be effectively increased, the real current density of the surface of the electrode can be effectively reduced in the industrial electrolysis process with relatively high current density, and the hydrogen evolution overpotential of the electrode in the electrolysis reaction process is further greatly reduced.

Description

technical field [0001] The invention relates to the technical field of electrodes, in particular to a porous nickel electrode and a preparation method thereof. Background technique [0002] At present, a new round of energy technology revolution is emerging around the world, and the international energy pattern is also undergoing profound changes. Renewable energy is gradually becoming the main source of new electricity, and the structure and operation mode of the power grid will undergo major changes. The energy utilization medium of carbon can realize the large-scale consumption of fluctuating renewable energy. Hydrogen has the dual attributes of energy and material connection, and is an important link for the extension of electric energy to replace fossil fuels in various industries. It does not emit air during use Therefore, the development of the hydrogen energy industry is an important way to deal with the above challenges, and has great strategic significance for buil...

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Problems solved by technology

[0004] At present, the main problems of hydrogen production by electrolysis of water are high energy consumption and low efficiency. In the production of water electrolysis, 80% to 90% of the cost is electricity. Therefore, how to reduce the energy consumption of water electrolysis is the key to the problem. Therefore, we propose a A kind of porous nickel electrode and preparation method thereof