High-energy-density hydrographic three-dimensional porous titanium-based lead dioxide/activated carbon asymmetric type supercapacitor
A supercapacitor, three-dimensional porous technology, used in capacitors, electrolytic capacitors, liquid electrolytic capacitors, etc., can solve the problems of small potential window and low specific energy, and achieve the effect of improving specific capacitance, enhancing binding force, and increasing specific surface area.
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Embodiment 1
[0029] (1) Preparation of positive electrode
[0030] a. Substrate pretreatment: Cut a porous titanium plate with a pore size of 30 μm and a thickness of 1 mm to the required size, soak it in a hot NaOH solution with a mass fraction of 10%, degrease the substrate, and fully clean the porous titanium substrate. Put the substrate into a 10% HCI aqueous solution and heat it to a slight boiling state. The etching is uniform. Stop etching after the acid solution gradually turns light purple. Rinse it with secondary deionized water and place it in secondary deionized water for later use. ;
[0031] b. Preparation of tin antimony oxide intermediate layer: according to the coating amount of the intermediate layer 2-10mg / cm 2 Configure SnCl 4 (1mol / L)+SbCl 3 (0.11mol / L) n-butanol solution, add a few drops of concentrated hydrochloric acid in the solution to prevent hydrolysis, coat the solution on the above-mentioned treated porous titanium substrate, dry it in an oven at 120°C for ...
Embodiment 2
[0043] The method is the same as that of Example 1, except that a porous titanium plate with a pore diameter of 60 μm and a thickness of 1 mm is used. The current density of the capacitor in this example is 10mA / cm 2 , the working voltage is 0.8-1.8V, the measured specific capacitance is 131.5F / g, the energy density is 51.2Wh / Kg, and the power density is 445W / Kg.
Embodiment 3
[0045]The method is the same as that of Example 1, except that a porous titanium plate with a pore diameter of 100 μm and a thickness of 1 mm is used. The current density of the capacitor in this example is 10mA / cm 2 , the working voltage is 0.8-1.8V, the measured specific capacitance is 128.9F / g, the energy density is 50.8Wh / Kg, and the power density is 438W / Kg.
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