Nickel felt is a metal fiber material made from high-purity nickel fibers through a non-woven process, featuring a three-dimensional porous structure and a very high specific surface area. Nickel felt retains the high electrical conductivity, excellent corrosion resistance, and good mechanical properties of nickel, while also being lightweight, breathable, and flexible. Its unique structure makes nickel felt highly effective in applications such as battery electrodes, fuel cells, catalyst supports, high-temperature filtration, and electromagnetic shielding, making it a multifunctional, high-performance material.