Nickel mesh is precision-woven from N4/N6 pure nickel wire, available as single-layer plain/twill weave or multi-layer composite sintered structure. After rolling and sintering, the staggered pore layers form a pore-size gradient from surface to core, combining filtration accuracy, dirt-holding capacity and mechanical strength - overcoming the clogging and deformation weaknesses of single mesh. As AEM electrolyzer diffusion layer / current collector it offers high open area and low resistance; laminating with nickel felt further improves support. Also widely used for liquid filtration, gas-liquid distribution and EMI shielding.