Fuel cell gas diffusion layer with novel structure and preparation method
A gas diffusion layer and fuel cell technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of poor conductivity of MEA and poor drainage performance of gas diffusion layer, and achieve reduced contact resistance, improved conductivity, The effect of improving conductivity
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Embodiment 1
[0051] Step 1: Prepare the conductive mixed slurry: Weigh 25g of carbon nanotubes in a beaker, add 400ml of ethanol and 100ml of deionized water, and after uniform mixing, stir with a high-speed mixer at a speed of 1000r / min, and stir at a high speed for one hour.
[0052] Preparation of hydrophobic mixed slurry: Weigh 15g of carbon nanotubes into a beaker, add 150ml of ethanol and 50ml of deionized water, and then add 1g of PTFE emulsion. hours, spare.
[0053] Preparation of hydrophobic agent solution: Weigh 300ml of deionized water and 2g of PTFE emulsion in a beaker, stir ultrasonically for 10min, and set aside.
[0054] Step 2: Hydrophobic treatment of carbon paper: Use a plane cutting machine to cut carbon paper with a size of 50*50mm, dry thickness of 150μm, put it in the hydrophobic agent solution, soak it in ultrasonic for 10s, so that the PTFE solution is evenly covered on the surface of the carbon paper, Then, the carbon paper was placed in an oven at 100 °C for 10...
Embodiment 2
[0064] Step 1: Prepare conductive mixed slurry: Weigh 25g of acetylene black into a beaker, add 500ml of ethanol and 100ml of deionized water, and after uniform mixing, stir with a high-speed mixer at a speed of 1000r / min, and stir at a high speed for one hour.
[0065] Preparation of hydrophobic mixed slurry: Weigh 35g of acetylene black into a beaker, add 400ml of ethanol and 150ml of deionized water, then add 2g of tetrafluoroethylene emulsion, after uniform mixing, use a high-speed mixer to stir at 1000r / min, high-speed Stir for an hour and set aside.
[0066] Preparation of hydrophobic agent solution: Weigh 525ml of deionized water and 3g of tetrafluoroethylene emulsion in a beaker, stir ultrasonically for 10min, and set aside.
[0067] Step 2: Hydrophobic treatment of carbon paper: Use a plane cutting machine to cut carbon paper with a size of 50*50mm, dry thickness of 150μm, put it in the hydrophobic agent solution, soak it in ultrasonic for 20s, so that the hydrophobic...
Embodiment 3
[0077] Step 1: Prepare conductive mixed slurry: Weigh 30g of graphene into a beaker, add 686ml of ethanol and 114ml of deionized water, and after uniform mixing, stir with a high-speed mixer at a speed of 1000r / min, and stir at a high speed for one hour.
[0078] Preparation of hydrophobic mixed slurry: Weigh 40g of graphene into a beaker, add 500ml of ethanol and 200ml of deionized water, then add 2g of fluorinated ethylene propylene emulsion, after uniform mixing, stir with a high-speed mixer at a speed of 1000r / min, high-speed Stir for an hour and set aside.
[0079] Preparation of hydrophobic agent solution: Weigh 500 ml of deionized water and 2.5 g of fluorinated ethylene propylene emulsion in a beaker, stir ultrasonically for 10 min, and set aside.
[0080] Step 2: Hydrophobic treatment of carbon paper: Use a plane cutting machine to cut carbon paper with a size of 50*50mm, dry thickness of 150μm, put it in the hydrophobic agent solution, soak it in ultrasonic for 30s, s...
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