Atomic Metal- and N-Doped Open-Mesoporous Carbon Nanofibers for Efficient and Bio-Adaptable Oxygen Electrode in Metal-Air Batteries

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The invention presents a method for manufacturing atomic metal (M)- and nitrogen (N)-doped open-mesoporous carbon nanofibers, which serve as advanced oxygen electrodes in metal-air batteries, especially magnesium-air (Mg-air) batteries. These nanofibers have a high surface area and interconnected porous structure, with single-atom metal-Nx catalytic sites (where M can be Fe, Co, Ni, or other transition metals), improving oxygen reduction reaction (ORR) performance. The result is a highly efficient, flexible, bio-adaptable air cathode suitable for batteries operating in neutral electrolytes, offering better energy density and durability than traditional Pt/C-based electrodes.

Use CasesContent extracted from patent full text and abstract with AI.

• As oxygen electrodes (air cathodes) in advanced metal-air batteries, especially Mg-air and Zn-air batteries
• Power sources for lightweight, flexible, and wearable electronic devices
• Bio-compatible and bio-adaptable power solutions for biomedical or health monitoring devices
• Electrocatalysts for energy and environmental applications, e.g., in fuel cells or supercapacitors
• Component in biosensors or tissue engineering platforms, where cytocompatibility is essential
• Electrodes in Li-ion batteries or supercapacitors for high-performance energy storage

BenefitsContent extracted from patent full text and abstract with AI.

• Greatly improved catalytic activity for the oxygen reduction reaction (ORR), enabling higher battery efficiency
• High surface area and open-mesoporous structure enhance mass transport and air/ion diffusion within the electrode
• Bio-adaptability and cytocompatibility, making them suitable for biomedical and wearable electronic applications
• Superior capacity, higher discharge voltage plateaus, improved power densities, and longer operating life compared to conventional electrodes
• Flexibility, supporting use in flexible and miniature devices or micro-batteries
• Facile, scalable, and cost-effective fabrication method that allows for precise doping of single atomic metal sites
• Reduced dependence on costly precious metals (like Pt), lowering battery costs and increasing sustainability

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Patent Abstract

The present invention relates to a method for producing atomic metal (M)- and N-doped open-mesoporous carbon nanofibers, atomic M- and N-doped open-mesoporous carbon nanofibers produced by said method, the use of said atomic M- and N-doped open-mesoporous carbon nanofibers as an oxygen electrode for metal-air batteries, and to a metal-air battery comprising the atomic M- and N-doped open-mesoporous carbon nanofibers.