Porous electrode materials and catalyst supports

High conductivity, large surface area, tailor-made porosity and good chemical resistance - the requirement profile of many electrodes and catalyst supports can be optimally met by using carbon fiber based materials. Our existing product portfolio offers diverse solutions based on woven or nonwoven fabrics (needle felts, hydroentangled nonwovens and papers). Depending on the application, these materials can be modified according to the customer's requirements, or an optimized textile structure can be achieved by altering the raw materials and/or production process. In addition to fiber based structures, it is also possible to develop and manufacture porous bulk materials, e.g. carbon foams.

Depending on the specific requirements, the following parameters can be adjusted:

  • Selection of fibers: Precursor (cellulose, polyacrylonitrile (PAN), also with doping) and fiber morphology (porosity, cross-sectional shape, surface structure)
  • Textile production: Thickness, density, area weight, porosity, permeability, electrical and thermal conductivity, drapability / stiffness, strength, compression behavior
  • Finishing of the textile: Adjustment of the surface chemistry (introduction of functional groups, optimization of wettability) and modification of the surface morphology (enlargement of the active surface, application of functional coatings)
  • Alternatives to fiber-based precursors: Carbonization and graphitization of porous, carbon based structures; Furthermore our 3D printing process offers an alternative for the production of porous carbon structures.

Using our technologies, we develop and manufacture electrode materials and catalyst carriers from laboratory scale to continuous production. In our test lab, the new materials can also be electrochemically characterized directly on site.

Our porous carbon materials are used in the following fields, among others:

  • Energy storage (metal-air cells, redox flow batteries, lithium-sulfur batteries)
  • Fuel cells
  • Microbial electrochemical technologies
  • Electrolysis (proton exchange membrane (PEM) electrolysis, oxygen depolarized cathodes (ODC))
  • Electrochemical reactors and sensors
  • Catalyst carriers
  • Water treatment (e.g. decalcification, desalination)

Our carbon fiber paper based gas diffusion layers (GDL) are hydrophobically treated and coated with a micro-porous layer (MPL). This significantly improves the water management, as well as the performance and durability of the fuel cell (SIGRACET® Fuel cell components).

In the MIDES project, an energy efficient system is being developed in cooperation with international partners that uses microbial desalination cells to turn salt water into drinking water. To achieve this goal, the SGL Group is developing electrodes based on carbon fiber felt and paper for optimum bioelectrochemical process control.

 

 

Discuss your specific requirements with us, and let us develop the optimal design for your application together!

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