High-temperature-resistant ferroelectric polymer-based dielectric energy storage composite film as well as preparation method and application thereof
A technology of ferroelectric polymers and composite thin films, applied in fixed capacitor dielectrics, thin film/thick film capacitors, stacked capacitors, etc., can solve the problems of unmentioned high temperature applications, untested energy storage density and energy storage efficiency, etc. Achieve the effects of promoting self-assembly deposition, enhancing thermal conductivity, and improving thermal stability
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Embodiment 1
[0059] The high temperature resistant ferroelectric polymer-based dielectric energy storage composite thin film of this embodiment and the preparation method thereof comprise the following steps:
[0060] Step 1, weigh 1.6g of silicon carbide and dissolve it in a mixed solvent of 200ml of n-butanol, 10ml of deionized water, and 0.5g of cetyltrimethylammonium bromide, and ultrasonically disperse for 30min until a uniform suspension liquid A is formed. Then 4.39ml of tetrabutyl titanate was dissolved in 50ml of n-butanol, and magnetically stirred for 30min to form titanium dioxide precursor solution B.
[0061] Step 2, under the condition of magnetic stirring, slowly drop liquid B into liquid A for 12 hours, so as to completely hydrolyze tetrabutyl titanate. Composite powder can be obtained by spontaneous precipitation, washed three times with deionized water, and dried at 90°C.
[0062] Step 3, adding the obtained core-shell particles into a hydrothermal kettle together with a...
Embodiment 2
[0071] This embodiment is basically the same as Embodiment 1, the difference is:
[0072] Step 4, weigh 0.1132g of core-shell powder and disperse it into 10ml of dimethylformamide, and ultrasonically disperse for at least 4 hours until a uniform suspension is formed. Then 1.0193 g of P(VDF-HFP) was added to the suspension using ultrasonic dispersion and mechanical shaking for several hours until a homogeneous suspension. A composite film with a mass fraction of 10 wt.% was prepared by casting method. Dry at 90°C to obtain a nanocomposite film. The composite film is a single layer with a thickness of 10-20 μm.
Embodiment 3
[0074] This embodiment is basically the same as Embodiment 1, the difference is:
[0075] Step 4, weigh 0.0256g of core-shell powder and disperse it into 10ml of dimethylformamide, and ultrasonically disperse for at least 4 hours until a uniform suspension is formed. Then 0.9998 g of P(VDF-HFP) was added to the suspension using ultrasonic dispersion and mechanical shaking for several hours until a homogeneous suspension. A composite membrane with a core-shell nanofiller mass fraction of 2.5wt.% was prepared by casting method. Dry at 90°C to obtain a nanocomposite film. The composite film is a single layer with a thickness of 10-20 μm.
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