A polypyrrole film-based flexible supercapacitor and its preparation method and use
A polypyrrole film-based flexible and pyrrole film-based flexible technology is applied in the field of polypyrrole film-based flexible supercapacitors, which can solve problems such as poor electrochemical performance, and achieve low cost, simple synthesis method, and high volume specific energy and volume. The effect of specific power
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Embodiment 1
[0079] A preparation method of polypyrrole film, the steps are as follows:
[0080] (1) Add 1290 mL of water to a plastic dish with a size of 43 cm × 30 cm × 6 cm, then add 5.16 mL of ethyl acetate dropwise, and place the plastic dish in a freezer at –10 °C for 6 h to obtain a Smooth, level ice.
[0081] (2) Dissolve 0.57 g of potassium permanganate in 18 mL of water with a pH of 2, pre-cool the solution in a refrigerator at 5 °C for 1 h, then pour it on the ice obtained in step (1), and shake slightly Using a plastic plate, the potassium permanganate aqueous solution was evenly spread on the ice surface, and kept at –20 °C for 2 h to obtain a smooth and flat ice layer containing oxidants.
[0082] (3) Add 0.5 mL of pyrrole to 7.7 mL of ethyl acetate, pre-cool in a refrigerator at 5 °C for 0.5 h, then pour it on the surface of the oxidant ice layer obtained in step (2), and keep it at –10 °C for 1 h , to obtain polypyrrole membranes supported on ice.
[0083] (4) Rinse the ...
Embodiment 2
[0085] A preparation method of polypyrrole film, the steps are as follows:
[0086] (1) Add 500 mL of water to a plastic dish measuring 43 cm × 30 cm × 6 cm, then add 1 mL of absolute ethanol dropwise, and place the plastic dish in a freezer at –20 °C for 6 h to obtain a Smooth, level ice.
[0087] (2) Dissolve 2.35 g of ferric chloride hexahydrate in 18 mL of water with a pH of 2, pre-cool the solution in a refrigerator at 5 °C for 0.5 h, and then pour it on the ice obtained in step (1) , shake the plastic plate slightly to spread the ferric chloride aqueous solution evenly on the ice surface, and keep it warm at –20 °C for 2 h to obtain a smooth and flat ice layer containing oxidizer.
[0088] (3) Add 0.5 mL of pyrrole to 3 mL of absolute ethanol, pre-cool in a refrigerator at 0 °C for 0.5 h, then pour it on the surface of the oxidant ice layer obtained in step (2), and keep it at –20 °C for 40 min , to obtain polypyrrole membranes supported on ice.
[0089] (4) Rinse the...
Embodiment 3
[0091] The reaction time of step (3) in Example 2 was extended to 6 h, and other conditions remained unchanged, and the obtained self-sustaining polypyrrole film sample was marked as S-3.
[0092] Result analysis
[0093] Figure 1~Figure 3 FESEM images of samples S-1 to S-3. From Figure 1~Figure 3 It can be seen that samples S-1, S-2, and S-3 are all dense films, and the film thicknesses are 270 ± 15, 140 ± 5, and 260 ± 15 nm, respectively. This shows that the thickness of the film can be regulated by changing the reaction time.
[0094] Figure 4 is the UV-Vis transmission spectrum of sample S-2. From Figure 4 It can be seen that the sample S-2 has good light transmittance to ultraviolet-visible light with a wavelength of 200-800nm, and the light transmittance is greater than 30%. Figure 4 The absorption peaks at 320, 440, 463 and 540 nm in the middle correspond to the π–π* transition of electrons in polypyrrole, the transition of the valence band to the conduction...
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