Bipolar plates for flow batteries
Product Description:
The key component connecting the positive and negative electrodes in a fuel cell directly influences battery efficiency, lifespan, and cost. A carbon composite material has been engineered to achieve an improved conductivity of 5 × 10⁻⁵ Ω·cm. Additionally, advanced electrolyte management is implemented through optimized channel designs that ensure uniform electrolyte distribution while minimizing dead zones. To enhance thermal performance, the system incorporates an auxiliary cooling mechanism that helps maintain the battery’s operating temperature. Finally, conductive layers are strategically placed to connect adjacent electrodes, enabling efficient, directional electron flow throughout the stack.
| Recommended grades: | KBC-BP-LG-0.8 |
| Thickness, mm: | 0.5–1.0 ± 0.04 |
| Density, g/cm 3： | ≥1.73 |
| Tensile strength, MPa: | ≥20 |
| Flexural strength, MPa: | ≥20 |
| Contact resistance, mΩ·cm 2 @1.0 MPa: | ≤15 |
| Electrical conductivity, S/cm: | ≥300 |
| Ash content, %: | ≤2 |
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1. Using flexible graphite as the base material and adding reinforcing agents to make it thinner yet stronger;
2. Raw materials undergo purification treatment, resulting in higher purity and improved durability;
3. By adopting new material technologies, we have significantly boosted mass production capacity while reducing costs.
Gas diffusion layer for fuel cells
| Recommended grades: | KBC-70-GDL | KBC-70-GDL2 | KBC-100-GDL | KBC-140-GDL |
| Gram weight, g/m 2： | 60 ± 5 | 72 ± 6 | 70 ± 6 | 110 ± 8 |
| Thickness, μm @ 0.025 MPa: | 160 ± 15 | 175 ± 15 | 220 ± 15 | 280 ± 20 |
| Air permeability, m 3/m2 ·min@50Pa: | >0.1 | >0.1 | >0.1 | >0.1 |
| Tensile strength, N/cm: | >40 | >40 | >40 | >60 |
| Contact resistance, mΩ·cm 2 @1.0 MPa: | Approximately 10 | Approximately 10 | Approximately 10 | Approximately 10 |
| Resistivity, mΩ·cm: | Approximately 15 | Approximately 15 | Approximately 15 | Approximately 15 |
| Recommended grades: | KBC-R-60 | KBC-R-70 | KBC-R-100 | KBC-R-140 |
| Gram weight, g/m 2： | 35 ± 4 | 44 ± 4 | 60 ± 5 | 86 ± 6 |
| Thickness, μm @ 0.025 MPa: | 120 ± 12 | 140 ± 15 | 195 ± 15 | 260 ± 20 |
| Air permeability, m 3/m2 ·min@50Pa: | > 15 | > 15 | > 15 | > 15 |
| Porosity, %: | >80 | >80 | >80 | >80 |
| Tensile strength, N/cm: | > 40 | > 40 | > 40 | >60 |
| IP-directional thermal conductivity, W/(m·K): | ~14 | ~14 | ~14 | ~14 |
| Contact resistance, mΩ·cm 2 @1.0 MPa: | ~5 | ~5 | ~5 | ~5 |
| Resistivity, mΩ·cm: | Approximately 10 | Approximately 10 | Approximately 10 | Approximately 10 |
Carbon paper for water electrolysis
| Recommended grades: | KBC-C-180 | KBC-C-300 |
| Gram weight, g/m 2： | 136 ± 10 | 350 ± 30 |
| Thickness, μm @ 0.025 MPa: | 350 ± 40 | 400 ± 50 |
| Air permeability, m 3/m2 ·min@50Pa: | > 6.0 | > 0.5 |
| Porosity, %: | 80 | 50 |
| Tensile strength, N/cm: | >80 | |
| IP-directional thermal conductivity, W/(m·K): | ~14 | ~14 |
| Contact resistance, mΩ·cm 2 @1.0 MPa: | ~5 | ~5 |
| Resistivity, mΩ·cm: | Approximately 10 | Approximately 10 |
Carbon Felt for Flow Batteries
| Recommended grades: | KBC-PSG-4.3 | KBC-PSG-2.5 |
| Density, g/cm 3： | 0.08–0.1 | 0.08–0.1 |
| Thickness tolerance, %: | ±7.5 | ±7.5 |
| Porosity, %: | ≥95 | ≥95 |
| Specific surface area, m² 2 /g: | ≥2 | ≥2 |
| Contact resistance, mΩ·cm 2 @1.0 MPa: | ≤0.1 | ≤0.1 |
| Voltage efficiency, VE 160 mA/cm 2： | ≥85 | ≥85 |
| Energy efficiency, EE 160mA/cm 2： | ≥82 | ≥82 |
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