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| JUTAI supplies PEEK, PEI, PSU and PPS engineering plastics for alkaline water electrolyzer and PEM electrolyzer components. Available services include material selection, sheet and rod supply, prototyping and CNC machining of insulating frames, spacer plates, sealing supports, manifolds and structural components. Conductive bipolar-plate applications require specially formulated compounds and project-specific validation. | |||||||||
JUTAI supplies PEEK, PEI, PSU and PPS engineering plastics and CNC-machined components for alkaline water electrolyzer and PEM electrolyzer systems.
These materials can be evaluated for stack frames, insulating plates, spacer components, sealing supports, manifolds, connector housings and other structural or fluid-handling parts.
Natural unfilled PEI and PSU are electrically insulating materials and should not automatically be described as conductive bipolar plates. Conductive polymer bipolar plates require specially formulated compounds and separate validation of electrical conductivity, contact resistance, chemical stability and long-term electrochemical performance.
Material selection must be based on the electrolyzer type, electrolyte composition, concentration, operating temperature, pressure, electrical requirements, compression load and expected service life.
Hydrogen electrolyzers contain components with very different functional requirements. Some parts must provide electrical conductivity, while other parts must provide insulation, sealing support, chemical resistance or dimensional stability.
A material suitable for an external electrical insulator may not be suitable for direct and continuous electrolyte contact. Likewise, a natural engineering plastic with good chemical resistance is not automatically suitable for use as a conductive bipolar plate.
JUTAI evaluates the component function and operating environment before recommending a material or machining solution.
Alkaline water electrolyzers normally operate with an alkaline electrolyte such as potassium hydroxide solution. Depending on the equipment design and operating conditions, engineering plastics may be considered for:
Insulating stack frames
Spacer plates
Sealing support rings
Manifolds and flow-distribution components
Electrical isolation components
Structural supports
Instrument and connector housings
Machined prototype components
PSU, PPS and PEEK may be evaluated for selected alkaline electrolyzer parts, subject to the electrolyte concentration, temperature, mechanical load and exposure time.
For a more focused PSU application guide, see our PSU Sheet for Alkaline Water Electrolyzer Frames.
PEM electrolyzers present different material-selection challenges, including high-purity water, differential pressure, an electrochemical environment and strict contamination-control requirements.
Depending on whether a component is exposed directly to the active electrochemical area, engineering plastics may be evaluated for:
Electrical insulating components
Sealing and gasket support parts
External structural components
Manifolds and fluid-handling parts
Sensor and connector housings
Compression-resistant spacers
Machined test and prototype fixtures
PEEK is often considered when higher temperature capability, chemical resistance and mechanical stability are required. However, every direct-contact application must be validated under the actual electrochemical and operating conditions.
A bipolar plate performs electrical, mechanical and fluid-management functions. A conductive bipolar plate must provide adequate conductivity and low contact resistance while maintaining chemical and dimensional stability.
Natural PEEK, PEI, PSU and PPS grades are not automatically conductive.
For conductive polymer bipolar-plate development, the material normally requires a conductive formulation containing suitable fillers. The finished compound and component should be tested for:
Through-plane and in-plane electrical conductivity
Interfacial contact resistance
Chemical resistance
Electrochemical stability
Mechanical strength
Dimensional stability
Gas permeability
Thermal cycling performance
Long-term compression behavior
Natural insulating grades are more appropriately positioned for electrolyzer frames, spacer plates, supports, manifolds, housings and electrical isolation components.
