Sodium-sulfur battery sulfur electrode current collector MAX-phase multi-layer composite protective coating and preparation method thereof
A sodium-sulfur battery, protective coating technology, applied in battery electrodes, electrode carriers/current collectors, coatings, etc., can solve the problems of corrosion resistance, electrical conductivity and thermal conductivity, etc. Reduced thermal expansion mismatch, easy to control effect
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[0029] A method for preparing a sulfur electrode current collector MAX phase multilayer composite protective coating for a sodium-sulfur battery, comprising the following steps:
[0030] (1) Sandpaper the surface of the current collector, and then use acetone and alcohol to ultrasonically clean it, then dry it for use;
[0031] (2) Place the current collector dried in step (1) in a magnetron sputtering device, heat the current collector first, and then sputter-deposit the sulfur electrode current collector under the protection of an inert gas, and deposit Cr on the surface of the current collector. 2 AlC coating;
[0032] (3) In the above deposition system, close the Al target and keep the Cr target and C 2 h 2 Continuous access, continuous sputtering, in Cr 2Deposit a layer of Cr on the AlC coating 3 C 2 Coating, get Cr on the surface of current collector 2 AlC / Cr 3 C 2 Composite coating;
[0033] (4) Repeat the above steps (2) to (3) to obtain multiple layers of alt...
Embodiment 1
[0046] (1) The surface of the stainless steel substrate (20×10×5mm) was polished with 280-1200-mesh sandpaper in sequence, then ultrasonically cleaned with acetone and alcohol, and then dried for use.
[0047] (2) Put the dry stainless steel substrate into the magnetron sputtering chamber, and vacuum the magnetron sputtering chamber to 6×10 -4 Pa, and then heat the stainless steel substrate to 550°C.
[0048] (3) Flow Ar gas into the cavity (Ar gas flow rate 20 sccm), and sputter for 10 minutes to remove oxides on the surface of the target and achieve the purpose of cleaning the target.
[0049] (4) Then pass into C 2 h 2 gas, keep Ar gas and C 2 h 2 Gas ratio (Ar:C 2 h 2 =20 sccm:1 sccm), the working pressure is 0.5Pa, open the target baffle, set the Cr target power to 60W (the current is 0.24A, the voltage is 250V), the Al target power is set to 30W (the current is 0.1A, The voltage is 300V), start sputtering, sputtering for 1h, and get Cr 2 AlC-MAX phase coating.
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Embodiment 2
[0054] (1) The surface of the stainless steel substrate (20×10×5mm) was polished with 280-1200-mesh sandpaper in sequence, then ultrasonically cleaned with acetone and alcohol, and then dried for use.
[0055] (2) Put the dry stainless steel substrate into the magnetron sputtering chamber, and vacuum the magnetron sputtering chamber to 6×10 -4 Pa, and then heat the stainless steel substrate to 550°C.
[0056] (3) Flow Ar gas into the cavity (Ar gas flow rate 20 sccm), and sputter for 10 minutes to remove oxides on the surface of the target and achieve the purpose of cleaning the target.
[0057] (4) Then pass into C 2 h 2 gas, keep Ar gas and C 2 h 2 Gas ratio (Ar:C 2 h 2 =20 sccm:1 sccm), the working pressure is 0.5Pa, open the target baffle, set the Cr target power to 60W (the current is 0.24A, the voltage is 250V), the Al target power is set to 30W (the current is 0.1A, Voltage is 300V), start sputtering, sputtering 2h, get Cr 2 AlC-MAX phase coating.
[0058] (5) ...
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