Currento® porous transport layer for hydrogen production

PTL media zoom
Currento® is a metal fiber media used as porous transport layer for electrochemical devices.  It is a high performing PTL material with intrinsic high permeability and strength. Currento® is available in titanium, nickel, and stainless steel.

A porous transport layer, sometimes referred to as gas diffusion layer (GDL) or current collector, has multiple functionalities that influence performance and durability of the electrochemical device. An ideal porous transport layer should:

  • Enable efficient flow of gaseous/liquid reactants/products
  • Have high electrical, and thermal, conductivity
  • Be corrosion resistant towards the specific environment
  • Have tuned interface towards other components such as membrane and electro-catalys


3D surface renderings of metal fiber PTLs

 

Electrolyzer metal fiber media comparison
Source: Paul Scherrer Institut, Tobias Schuler et al 2019 J. Electrochem. Soc. 166 F270

Sintered metal fiber media have pore sizes in the µm-range. Compared to sintered metal powder, higher porosity, and thus permeability, can be achieved at similar pore size. Compared to metal foam, sintered metal fiber media enable a stepwise reduction in pore size and corresponding increase in surface area.

Technical specifications

 
Bekaert offers Metal fiber PTL’s which can be modified depending on customer request. Ni media is available for alkaline water electrolysis (AWE) and anion-exchange-membrane (AEM) water electrolysis, Ti media for proton-exchange-membrane (PEM) water electrolysis and Cu for electrochemical CO2 reduction. Download our product sheet 

Metal  316L, Ti, Ni, Cu
Fiber diameter range 2 – 40 µm (316L)
10 - 50 µm (Ti, Ni, Cu, ...)
Porosity  40% - 90%
Thickness
100 µm - 2 mm
Dimensions
Shape and cutting customizable according to customer need
Multilayers
Combination of multiple fiber diameters enabling structure with pore gradient
Coatings
dditional protective coating (e.g. Pt) for increased durability

Advantages

  • Making electrolysis more efficient
  • Making production highly scalable
  • Making innovation easier

Applications

  • better together

    Situation Customer demand for compact boiler design through a total solution.

    Solution Joint development of an environment-friendly burner system.

    Result Customers improve their competitiveness.

  • better together

    Situation We need a safe solution and huge monthly volumes

    Solution Via tests in the Bekaert lab, we worked out the required fiber mix with the lowest cost to serve our customers

    Result Cost efficiency must not be a compromise on quality

  • better together

    Situation Skiers count on safety when they go up the mountain

    Solution In close cooperation Bekaert developed superior quality wires that meet the technical customer requirements of ropeway constructors

    Result The customer handles the production of the cables, but also on-site weaving (or splicing) and installation. The cables have a life expectancy up to 40 years

  • better together

    Situation You want to apply innovative solutions tailored to your projects

    Solution We analyze possibilities and come with economical solutions

    Result Save money and time during construction

  • better together

    Situation Want to create long aesthetical walls and avoid movement joints

    Solution Applying Brickforce® allows me to double my joint distance

    Result With Brickforce® masonry reinforcement I can create new and exciting masonry wall design