Electrolyzed Brine Nickel Cathode Recycling

Nickel cathodes are essential in both diaphragm and ion-exchange membrane electrolyzers for brine electrolysis. Nickel remains stable and corrosion-resistant in this alkaline environment while exhibiting good activity for the hydrogen evolution reaction (HER). Electrolyzed brine nickel cathodes are typically mesh-structured. Deactivated cathodes from De Nora command higher prices in nickel cathode recycling markets.

Stability and Lifespan

Corrosion resistance rate: Annual corrosion rate (mm/year) in operating media (strong alkali, high temperature).

Resistance to reverse current/potential shock: Prevents passivation or dissolution.

Coating adhesion (if applicable): Critical for activation layers (e.g., Raney Ni, NiMo).

Catalytic Coating Characteristics

Coating types: Raney Ni, Ni-Mo, Ni-S, Ni-Fe oxides, etc.

Loading/thickness: Active material mass per unit area (mg/cm²).

Specific surface area/porosity: Determines active site quantity.

Composition and crystal structure: Affects intrinsic activity.