Application fields:
Alkaline water electrolysis (ALK) hydrogen production electrolyzer cathode/anode substrate hydrogen energy equipment key electrode components surface functionalization treatment industrial electrolysis water hydrogen production system core consumables upgrade
Technical principles and processes:
Using Atmospheric Plasma Spraying (APS) technology, high-purity nickel (Ni) and aluminum (Al) composite powders are melted in a high-temperature plasma flame and sprayed onto the surface of the three-dimensional porous nickel mesh at high speed to form a micro-nano structure composite coating. After subsequent heat treatment, the coating can generate Ni₃Al intermetallic compounds and microporous structures with high catalytic activity in situ, significantly improving the electrochemical performance.
Core advantages: High electrocatalytic activity:
Rich active sites are formed on the surface of the Ni-Al coating, which reduces hydrogen/oxygen evolution overpotential and improves electrolysis efficiency. Excellent corrosion resistance: long-term stable operation in strong alkali (20–30% KOH) and high temperature (70–90°C) environments. Strong bonding strength: plasma spraying metallurgical bonding + mechanical fitting, the bonding strength between the coating and the nickel mesh matrix is ≥50 MPa. Porous structure retention: precise control of spraying parameters to ensure that the original porosity of the nickel mesh is not blocked (usually >85%) Customized service: supports different mesh numbers (such as 40–100 mesh), wire diameters, coating thickness (20–100μm) and composition ratios (such as Ni:Al = 95:5, 90:10, etc.)
Supporting capabilities:
Independently developed industrial-grade plasma spray equipment (power 30–80 kW, supports dual powder feeding, atmosphere protection). Can provide full-process services from substrate pretreatment → spraying → thermal diffusion treatment → performance testing to support small batch sample verification and large batch continuous production.
Application tips:
Suitable for alkaline electrolysis of water for hydrogen production (ALK), not suitable for PEM (proton exchange membrane) systems. It is recommended to cooperate with activation treatment (such as electrochemical etching) to further improve performance. It can be combined with the Raney Ni process to build a high specific surface area catalytic layer.
Nickel mesh cathode for hydrogen production, nickel mesh and Raney nickel spray coating are widely used in electrolysis water hydrogen production equipment to provide an efficient electrochemical reaction surface. These products ensure superior performance and durability through advanced thermal spray technology.
