Graphite Bipolar Plate
High Conductivity Pyrolytic Graphite bipolar plate of fuel cell
Bipolar Plate for Hydrogen Fuel Cell
Electrolysis/ electrode/ cathode graphite plate
carbon graphite plate
Three different graphite plates Product details
Specification of Popular Flexible Graphite Bipolar Plate:
which can be distinguished according to the maximum size, density and thickness.
| Item | Remarks | ||||
| Dimension (mm) | L≤500 | 500＜L≤1000 | 1000＜L≤1500 | L＞1500 | maximum size |
| Density ( g/cm ) | ≥1.73 | ≥1.75 | ≥1.77 | ≥1.79 | average value |
| Thickness (mm) | 0.60±0.03 | 0.67±0.03 | 0.74±0.03 | 0.81±0.03 | average value |
Performance Index of Flexible Graphite Bipolar Plate
According to the testing requirements of NBT42007-2013, our products can meet the following indicators: The actual testing by customers can fully meet the requirements of use.
| Item | Indicator |
| Tensile Strength（Mpa） | ≥20 |
| Bending Strength（Mpa） | ≥20 |
| Conductivity（S/cm） | ≥300 |
| Gas Tightness | No-leakage |
The graphite felt is used as electrode material for vanadium flow battery, Using imported oxide needle-punched felt, produced by carbonization, graphitization and other processes.Because the production is processed by continuous equipment, the surface of the felt is flat with uniform thickness, and the electrochemical properties are the same. in the use of electrode materials, our graphite felt has the characteristics of small internal resistances, good and uniform electrochemical activity, good corrosion resistance, low cycle attenuation and high energy efficiency,etc…
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Specification of fuel cell Graphite bipolar plate：
The function of bipolar plate (also known as diaphragm) is to provide gas flow channel, prevent the collusion between hydrogen and oxygen in the battery gas chamber, and establish a current path between the Yin and Yang poles in series. On the premise of maintaining a certain mechanical strength and good gas resistance, the thickness of bipolar plate should be as thin as possible to reduce the conduction resistance to current and heat
Carbonaceous materials. Carbonaceous materials include graphite, molded carbon materials and expanded (flexible) graphite. The traditional bipolar plate adopts dense graphite and is machined into gas channel· The graphite bipolar plate has stable chemical properties and low contact resistance with mea.
Bipolar plates need proper surface treatment. After nickel plating on the anode side of the bipolar plate, the conductivity is good, and it is not easy to be wetted by the electrolyte, which can avoid the loss of electrolyte. The flexible contact between the electrolyte diaphragm and the bipolar plate outside the effective area of the electrode can effectively prevent the gas from leaking out, which is the so-called “wet seal”. In order to reduce the corrosion of molten carbonate on stainless steel at the “wet seal” position, the bipolar plate frame needs to be “aluminized” for protection
customized
| Processing length of single plate | Processing width of single plate | Processing thickness of single plate | Minimum thickness for processing single plate | Recommended operating temperature |
| customized | customized | 0.6-20mm | 0.2mm | ≤180℃ |
| Density | Shorehardness | Shorehardness | FlexuralStrength | Electricalresistivity |
| ＞1.9g/cm3 | ＞1.9g/cm3 | ＞100MPa | ＞50MPa | ＜12µΩm |
| Impregnationprocess1 | Impregnationprocess2 | Impregnationprocess3 |
| The minimum thickness for processing single plate is 0.2mm.1KG/KPA without leakage | The minimum thickness for processing single plate is 0.3mm.2KG/KPA without leakage | The minimum thickness for processing single plate is 0.1mm.1KG/KPA without leakage |
Anti-explosion performance test of adhesive plate (method from American fuel bipolar plate company)
The special tooling locks the four sides of the adhesive plate with a torque wrench of 13N.M, and pressurizes the cooling chamber. The adhesive plate will not be opened and leaked when the air pressure intensity is ≥4.5KG(0.45MPA)
Air tightness test of adhesive plate
Under the condition of pressurizing the cooling chamber with 1KG(0.1MPA) , there is no leakage in the hydrogen chamber, oxygen chamber and outer chamber.
Contact resistance measurement
Single-point contact resistance:＜9mΩ.cm2 Average contact resistance:＜6mΩ.cm2
Quick Service
For before-order tage,our professional sales team could respond your inquiry within 50-100 minutes during working hours and within 12 hours during close time. Quick and professional reply will help you win your client with perfect option at high efficiency.
For order-running stage, our professional service team will take pictures every 3 to 5 days for your 1st hand information update of the production and provide documents within 36 hours to update shipping progress. We pay high attention to after-sale service.
For after-sale stage, our service team always keep close contact with you and always stand by at your service. Our professional after sale service even include fly our engineers to help you solving problems on site. Our warranty is 12 months after delivery.
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FAQs
Do you have a minimum order quantity?
Yes, we require all international orders to have an ongoing minimum order quantity.
Can you supply the relevant documentation?
Yes, we can provide most documentation including Certificates of Analysis / Conformance; Insurance; Origin, and other export documents where required.
What is the average lead time?
For samples, the lead time is about 7 days. For mass production, the lead time is 15-25 days after receiving the deposit payment. The lead times become effective when we have received your deposit, and we have your final approval for your products. In all cases we will try to accommodate your needs. In most cases we are able to do so.
What kinds of payment methods do you accept?
You can make the payment to our bank account, Western Union or PayPal:
30% deposit in advance, 70% balance before shipment or against the copy of B/L.
What is the product warranty?
We warranty our materials and workmanship. Our commitment is to your satisfaction with our products. In warranty or not, it is the culture of our company to address and resolve all customer issues to everyone’s satisfaction
Do you guarantee safe and secure delivery of products?
Yes, we always use high quality export packaging. We also use specialized hazard packing for dangerous goods and validated cold storage shippers for temperature sensitive items. Specialist packaging and non-standard packing requirements may incur an additional charge.
How about the shipping fees?
The shipping cost depends on the way you choose to get the goods. Express is normally the most quickest but also most expensive way. By seafreight is the best solution for big amounts. Exactly freight rates we can only give you if we know the details of amount, weight and way. Please contact us for further information.
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