Nickel-Iron Layered Double Hydroxide (NiFe-LDH) Coated on Nickel Felt as Electrode for Alkaline Electrolyzer, CAEENiFeLDHNF

Nickel-Iron Layered Double Hydroxide (NiFe-LDH) is widely regarded as the most active non-precious metal electrocatalyst for alkaline energy applications. Its unique 2D "brucite-like" host layers provide a massive surface area and a tunable electronic environment that is perfectly optimized for oxygen and nitrogen-based chemistry. Growing Ni-Fe-LDH on Nickel felt creates a high-performance electrode that combines the industry's most active non-precious OER catalyst with a superior three-dimensional current collector. While Nickel foam is more common in lab research, Nickel felt (also known as Nickel fiber felt) is often preferred for industrial-scale high-current density applications due to its higher fiber density and better mechanical robustness.

Nickel felt consists of entangled nickel fibers, providing distinct advantages over foam or mesh: (1) Superior Surface-to-Volume Ratio: The fine fiber diameter (typically 20-100 um) provides a much higher "effective" area for catalyst growth compared to the strut-based structure of nickel foam. (2) Bubble Management: The micro-porous structure of felt facilitates the rapid detachment of oxygen bubbles, preventing "shielding" where gas pockets block the catalyst from the electrolyte. (3) Mechanical Strength: Felt is more resistant to the physical stress of high-pressure gas evolution, ensuring the LDH nanosheets remain anchored during long-term operation.

Notes: Please try to store the NiFe-LDH electrode in a dry place.

References: 

1. X. Li, et al. In-situ intercalation of NiFe LDH materials: An efficient approach to improve electrocatalytic activity and stability for water splitting, J. Power Sources, 2017, 347, 193-200.
2. X. J. Zhai, et al. Advances in the design of highly stable NiFe-LDH electrocatalysts for oxygen evolution in seawater, Chem. Engineering J., 2024, 496, 1531874.