Components for Fuel Cells, Redox Flow Batteries and Electrolysers

Graphite-based Bipolar Plates and Gaskets for Renewable Energy Storage and Electricity Supply

Our energy system is facing fundamental changes. Increasing demands of energy and the necessity to significantly reduce carbon dioxide emissions are forcing many countries to search for innovative energy solutions. The increasing fraction of renewable energy resources with its inherently volatile availability increases the demand of energy storage technologies and energy converters. In this context, both fuel cells and Redox-Flow batteries contribute to a sustainable energy supply for the future.

Bipolar plates and gaskets are essential components of fuel cells and flow batteries. Since more than a decade Eisenhuth develops, manufactures and commercializes bipolar plates and gaskets. The materials are tailored for the specific application and the requirements of each customer.

For bipolar plates, Eisenhuth manufactures graphite polymer compounds employing specific extruders where different material combinations can be processed. Subsequently, in a first step blank plates are made via compression molding or injection molding, depending on material configuration or number of plates required. For small series, features and flow field patterns can be milled into the plate and modified for design reviews. For medium or large quantities and after design freeze, Eisenhuth manufactures a mold for compression or injection molding of the specific plate. By this step manufacturing efforts and cost become significantly reduced.

Continuous development and material improvement enable state-of-the-art material for the increasing market of renewable energy materials. Eisenhuth participates in a large number of international and national, interdisciplinary research projects in collaboration with universities, research institutes and companies along the entire value chain. This ensures a direct exchange between science and industry and enables that the latest results to be directly integrated in technical processes.

Fields of application:

  • HT-/ LT-PEM fuel cells
  • Redox-Flow batteries
  • PEM electrolysers
  • Heat exchangers

Scope of services:

  • Manufacturing of compound bipolar plates via compression molding from quantity “one”
  • Series production of compound bipolar plates via injection molding
  • Manufacturing of gaskets
  • Laser Cutting of complex gasket geometries
  • Manufacturing of molds for the series production of bipolar plates
  • Manufacturing of molds for the series production of gaskets
  • Machining of bipolar plates
  • Surface treatment of bipolar plates via blasting
  • Development and manufacturing of customized compound materials

Materials

Thus our bipolar plates are used in many different applications we have a large portfolio of compund materials which are optimized for the specific application. An overwiew of our standard materials is given by the following table:

material
plastic component
recommended application
technical data sheet
PPG86
Polypropylene
Redox-Flow Battery
PPG86
BMA5
Polyvinlyidenefluoride
LT-PEM fuel cell, Redox-Flow Battery
BMA5
BMA6
Polyvinlyidenefluoride
LT-PEM fuel cell, Redox-Flow Battery
BMA6
Melange
Polyvinlyidenefluoride
LT-PEM fuel cell, Redox-Flow Battery
Melange
Melange6
Polyvinlyidenefluoride
LT-PEM fuel cell, Redox-Flow Battery
Melange6
PPS
Polyphenylenesulfide
HT-PEM fuel cell
PPS

Customer specific adjustments are possible.

Like our bipolar plates our gaskets has to fullfil different aquirements depending on the application they are used in. Therefore we work with many different elastomers for the processing of gaskets. The following list can give you a brief overwiew:

  • Silicone rubber
  • HNBR
  • EPDM
  • FKM