ITO/Nb composite modified polymer electrolyte membrane fuel cell metal bipolar plate and preparation method therefor
A metal bipolar plate, composite modification technology, applied in fuel cells, fuel cell parts, circuits, etc., can solve the problem of shortening the service life of polymer electrolyte membrane fuel cells, corrosion of metal bipolar plates, and expensive battery packs and other problems, to achieve the effect of easy mass production, uniform and dense surface, improved corrosion resistance and surface conductivity
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Embodiment 1
[0016] For the ITO / Nb composite modified polymer electrolyte membrane fuel cell metal bipolar plate provided in this example, the ITO / Nb composite modified layer was prepared on the AISI 316L stainless steel substrate by magnetron sputtering according to the following steps:
[0017] 1) Pretreatment: AISI 316L stainless steel substrate after 400 ~ 2500 # Grinding with sandpaper followed by polishing with diamond abrasive paste. In order to remove the surface grease, use acetone and alcohol solution for ultrasonic cleaning for 15 minutes;
[0018] 2) The pretreated AISI 316L stainless steel substrate is placed in the sample chamber, preheated to 250 ° C; 2 The mixed gas, ion bombardment on the surface of AISI 316L stainless steel substrate to clean the surface and remove surface oxide, the time is 15min;
[0019] 3) Process parameters for preparing the Nb transition layer: the pulse frequency is 120kHz, the substrate bias is -50V, the Ar gas partial pressure is 0.7Pa, the pow...
Embodiment 2
[0023] For the ITO / Nb composite modified polymer electrolyte membrane fuel cell metal bipolar plate provided in this example, the ITO / Nb composite modified layer was prepared on the AISI 446 stainless steel substrate by magnetron sputtering according to the following steps:
[0024] 1) Pretreatment: AISI 446 stainless steel substrate after 400 ~ 2500 # Grinding with sandpaper followed by polishing with diamond abrasive paste. In order to remove the surface grease, use acetone and alcohol solution for ultrasonic cleaning for 15 minutes;
[0025] 2) The pretreated AISI 446 stainless steel substrate is put into the sample chamber and preheated to 250°C. into Ar and H 2 The mixed gas, ion bombardment on the surface of AISI 446 stainless steel substrate to clean the surface and remove surface oxide, the time is 15min;
[0026] 3) Process parameters for preparing the Nb transition layer: the pulse frequency is 120kHz, the substrate bias is -50V, the Ar gas partial pressure is 0.7...
Embodiment 3
[0030] The ITO / Nb composite modified polymer electrolyte membrane fuel cell metal bipolar plate provided by this embodiment is prepared by magnetron sputtering on an industrially pure titanium (TA2) substrate according to the following steps:
[0031] 1) Pretreatment: industrial pure titanium (TA2) substrate after 400 ~ 2500 # Grinding with sandpaper followed by polishing with diamond abrasive paste. In order to remove the surface grease, use acetone and alcohol solution for ultrasonic cleaning for 15 minutes;
[0032]2) The pretreated industrial pure titanium (TA2) substrate is put into the sample chamber and preheated to 250°C. into Ar and H 2 The mixed gas is used to bombard the surface of the industrially pure titanium (TA2) substrate to clean the surface and remove surface oxides, and the time is 15 minutes;
[0033] 3) Process parameters for preparing the Nb transition layer: the pulse frequency is 120kHz, the substrate bias is -50V, the Ar gas partial pressure is 0.7...
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