Fuel Cells & Batteries

Bipolar plates, flow-field components and current collectors for PEM fuel cells and electrolysers.

Bipolar plates for PEM fuel cells Electrolysis stack components Flow field plates Current collector plates Separator plates

High σ

Electrical conductivity

±0.02mm

Flow channel tolerance

Custom

Bipolar plate profiles

Graphite solutions for Fuel Cells & Batteries

Hydrogen fuel cells and lithium-ion battery production both depend on graphite's unique combination of electrical conductivity, chemical inertness, and machinability. In PEM fuel cells, graphite bipolar plates define the flow-field geometry that distributes hydrogen and oxygen across the membrane electrode assembly. In battery production, graphite fixtures and trays are used across formation, calendering, and cell assembly processes.

Expo Advanced Materials machines precision bipolar plates, flow-field components, and battery production tooling from fine-grain isostatic graphite — holding ±0.02 mm channel tolerances across large format plates with full dimensional inspection on every part.

Why Expo for Fuel Cells & Batteries

✓ Precision flow-field channel machining — ±0.02 mm tolerance

✓ Large-format bipolar plates up to 600 × 600 mm

✓ Chemical-resistant grades for acidic fuel cell environments

✓ Prototype to production volumes — no MOQ

Where we supply

Key applications in Fuel Cells & Batteries

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PEM Fuel Cell Bipolar Plates

Precision graphite bipolar plates with machined serpentine, parallel, or interdigitated flow-field channels for hydrogen PEM fuel cells.

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SOFC Components

High-temperature graphite components and interconnects for solid oxide fuel cell stacks.

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Battery Formation Fixtures

Graphite trays, holders, and contact plates used in lithium-ion battery cell formation and aging processes.

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Electrolyser Components

Porous and solid graphite components for alkaline and PEM water electrolyser stacks.

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Research Cell Tooling

Custom graphite hardware for R&D fuel cell test fixtures and single-cell test rigs.

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Current Collectors

Machined graphite current collector plates for flow battery and supercapacitor applications.

Technical reference

Typical specifications

Application	PEM fuel cell bipolar plates; battery tooling
Recommended grade	Fine-grain isostatic graphite
Electrical resistivity	<10 μΩ·m
Channel depth tolerance	±0.02 mm
Max plate size	Up to 600 × 600 mm
Surface finish	Ra 0.8–1.6 μm standard; Ra 0.4 available
Chemical resistance	Stable in dilute H₂SO₄ and NaOH environments
Lead time	Prototype: 1–2 weeks; production: 3–5 weeks