Hydrogel electrolyte and supercapacitor thereof
A supercapacitor and hydrogel technology, applied in the field of energy storage, can solve the problems of low energy density, toxicity, and inapplicability, and achieve the effects of good safety, simplified manufacturing process, and wide use
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Embodiment 1
[0027] Embodiment 1, the preparation of hydrogel electrolyte
[0028] The specific preparation method of the hydrogel electrolyte, the specific method is to take the polymerized monomer of the gel electrolyte, the initiator, the high molecular polymer and water respectively, after stirring and dissolving, heat to the temperature that can initiate the polymerization and fully polymerize, and obtain the polymer of the gel electrolyte. body, and then soak the polymerized gel electrolyte polymer precursor in an aqueous solution containing an inorganic salt of a cross-linked polymer and a zinc salt, wherein the quality of the zinc salt in the solution is greater than that of the solvent water, and the high concentration of zinc in the soaking process The ions form a water-in-salt electrolyte, which effectively prevents water from being decomposed and increases the voltage window.
[0029] In the present invention, the gel electrolyte polymerizable monomer is preferably acrylamide, ...
Embodiment 2
[0041] Embodiment 2, flexible supercapacitor
[0042] The flexible supercapacitor is composed of upper, middle and lower parts. The upper part is a zinc sheet as the negative electrode, the middle part is the gel electrolyte, and the lower part is the titanium foil as the positive electrode current collector. The active material is coated on the titanium foil current collector: conductive carbon black: sticky The mass ratio of binder polyvinylidene fluoride is 8:1:1, and the active material is activated carbon.
[0043] Preferably, the negative electrode adopts a zinc sheet with a length of 2 cm and a width of 3 cm. The positive electrode was prepared by mixing 80wt% activated carbon, 10wt% carbon black and 10wt% polyvinylidene fluoride in NMP solvent, then coating the mixture on a titanium foil and drying it in a constant temperature oven at 80°C.
[0044] The electrochemical performance was measured by CHI760E electrochemical workstation of Shanghai Chenhua Company for CV c...
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