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Product Advantage
• Redox flow batteries are a very promising large-scale energy storage technology, they are highly safe and recyclable, easy to scale up.
• As essential component, graphite bipolar plates are used to realize connection and separation, conduction of current generated, and provide support.
• Harog Technology's graphite bipolar plates have unique technology, both production process and application effects are at the international leading level. They have excellent properties such as high mechanical strength, low permeability, high conductivity, and strong acid and alkali resistance.
Technical Parameters
Datasheet of Harog’s Composite Isostatic Graphite Bipolar Plate
Parameter | Unit | Data |
Density | g/cm³ | ≥2.0 |
Electrical resistivity | μΩ·m | ≤10 |
Flexural strength | MPa | ＞60 |
Compressive strength | MPa | ＞130 |
Shore hardness | HSD | ＞70 |
Web thickness | mm | ≥0.3 |
Air permeability （@220kpag） | Sccm | ＜0.1 |
Contact resistance | mΩ·cm² | ≤5 |
Glycol compatibility | / | Excellent |
Acid resistance | / | Excellent |
Metal ion content | ppm | ≤50 |
Operation life | h | ＞30,000 |
Working temperature | ℃ | -40~200 |
CTE | 10^-6/°C | 5.6 |
ELV inspection report | / | Qualified |
IMDS | / | / |
Poisson ration | / | 0.35 |
Elastic modulus | GPa | 11 |
Specific heat capacity | J/kg·°C | 0.75 |
Product Uses
• Composite isostatic graphite bipolar plates are also known as Impervious Graphite Plate (IGP)
• Impervious Graphite Plate (IGP) – "High-Conductivity Core"
Technological Edge
Bulk density ≥ 2.0 g cm⁻³ achieved by proprietary isostatic pressing + pore-plugging modifier; oxidation mass-loss cut 98 % up to 1200 °C .
Light milling & web-thinning down to 0.35 mm (0.5 mm single-side, 0.8 mm double-side) → plate resistance ≤ 10 µΩ m, contact ≤ 5 mΩ cm² .
Key Performance
In-plane conductivity > 1100 S cm⁻¹ (target 1500 S cm⁻¹ grade under qualification).
Flexural > 70 MPa, compressive > 130 MPa; helium leak < 0.1 sccm @ 220 kPa (100 % inspected) .
Verified 30 000 h in 80 °C, 2 M H₂SO₄ + VO²⁺ with < 2 % power attenuation; now extending to > 50 000 h for 100 kW-class VRFB demos.
