Electrodes for Fuel Cells, Batteries, and Electrolyzers

Our Innovation: Electrospinning particle/binder fibers with a very high particle content, where the fiber mat electrode has inter-fiber and intra-fiber porosity. Electrode design can accommodate different binders (charged or uncharged) and different nm-size powders (Si for Li-ion battery anodes and PtCo/C for fuel cell cathodes.)

Our Advantage

  • Inter- and Intra-fiber porosity
  • Excellent mixing of particles and polymer binder
  • Fast water removal (no flooding) in fuel cells
  • Outstanding durability in fuel cells
  • Robust electrode morphologies and compositions (spin/spray electrode for Li-ion batteries)

Applications

  • Fuel cells
  • Redox flow batteries and regenerative fuel cells
  • Water electrolyzers (for H₂ generation) and other electrochemical reactors
  • Li-ion batteries

  Bipolar Membranes

Our Innovation: Using dual fiber electrospinning to create a 3D junction of interpenetrating and interlocking fibers of anion-exchange polymer and cation-exchange polymer.

Our Advantage

  • Chemically stable (in NaOH)
  • Thermally stable (up to 70°C)
  • Mechanically stable with no delamination or ballooning.
  • Membrane thickness from 25-150 μm
  • Membranes are made from fluoropolymer or hydrocarbon ionomers

Applications

  • Electrodialysis separations
  • Self-humidifying fuel cells
  • Electrochemical CO₂ reduction
  • Electrolyzers and other electrochemical reactors

   Reinforced/Composite Cation-Exchange and Anion-Exchange Membranes

Our Innovation: Dual fiber electrospinning of ionomer and uncharged or minimally charged reinforcing polymer fibers. The ionomer and support polymer are simultaneously electrospun, with post-electrospinning hot- pressing steps to melt the ionomer around supporting polymer fibers or melt the supporting polymer around ionomer fibers.

Our Advantage

  • Exceptional performance and durability
  • Wide range of possible polymer combinations
  • Charged polymers with poor mechanical properties can be incorporated into high strength composite membranes
  • Layered and gradient composition films
  • Membrane thickness as low as 15 μm
  • Radical scavengers can be easily added to the films

Applications

  • Electrodialysis separations
  • Fuel cells
  • Redox flow Batteries and regenerative fuel cells
  • Electrolyzers and other electrochemical reactors