A novel method to fabricate porous metal mats with high porosity, variable/controllable thicknesses, high surface area and good mechanical strength
A novel method to fabricate porous metal mats with high porosity, variable/controllable thicknesses, high surface area and good mechanical strength. They can act as a substrate for electrochemical reactions or catalysis. Potential fields of use include for instance: energy (electrode manufacture for energy devices such as lithium-ion batteries, electrolysers and fuel cells) and catalysis (manufacturing industrial catalyst and catalyst support).
Conventional methods of producing porous metals (metal foam) are only able to produce <500 cm-1 specific surface area (SSA) material. This is insufficient for application in fields such as catalysis, lithium-ion batteries, fuel cells and electrolysers; in which performance is proportional to the SSA. Finding a mechanically strong and high-SSA porous metal substrate has been a key challenge in the further development of these fields. Technology overview This method uses electrospinning to fabricate the metal mats. Electrospinning provides a simple and versatile way for generating nanofiber-based free-standing films from a rich variety of materials. The prepared metal mats have adjustable pore size (0.1~5 µm), high porosity (80-90 vol%), high specific surface area(>10000 cm-1), and controllable thickness (0.05 -10 mm).
The raw materials used in the fabrication method are inexpensive and easily accessible. Additionally, the method can be easily scaled up, as all needed equipment is commercially available.
Intellectual property information
GB Priority Application (Number: 2210835.1)