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A preparation method of flexible piezoelectric nanogenerator based on perovskite polymer composite

A nanogenerator, flexible piezoelectric technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrospinning, etc., can solve the problems of easy decomposition and short service life of devices

Active Publication Date: 2022-01-28
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, organic-inorganic hybrid perovskite has the disadvantage of being easily decomposed in oxygen environment, aqueous environment and high temperature environment, which makes the service life of the device using this material as the active material very short.
In order to solve the instability of perovskite-based piezoelectric nanogenerators and have the advantages of cheap, easy processing and no transfer process, it is urgent to develop new and more stable perovskite and its composite materials with the same excellent performance. Piezoelectric nanogenerator

Method used

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  • A preparation method of flexible piezoelectric nanogenerator based on perovskite polymer composite
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  • A preparation method of flexible piezoelectric nanogenerator based on perovskite polymer composite

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preparation example Construction

[0026] A method for preparing a flexible piezoelectric nanogenerator based on a perovskite polymer composite material provided by an embodiment of the present invention includes the following steps:

[0027] Step 1) Preparation of perovskite precursor solution: see figure 1 Add 0.1-3g of lead halide and cesium halide to 10-20ml N,N dimethylformamide, or add 0.1-3g of lead chloride and cesium chloride to 10-20ml dimethyl sulfoxide (DMSO) with a magnetic stirrer until completely dissolved. Then take 3ml more solution, add 0.4-3g polyvinylidene fluoride (PVDF), stir magnetically at 50°C until the polyvinylidene fluoride is completely dissolved into a clear and transparent solution, then add 0.2-0.4ml oleic acid and 0.2- 0.4ml of oleylamine, after magnetic stirring for half an hour, a clear, uniform and transparent perovskite precursor solution was obtained.

[0028] Step 2) Electrode preparation: use a flat screen printing machine to print the finger electrodes. The flat screen...

Embodiment 1

[0036] Step 1) raw material preparation: the weighed CsI, PbI 2 Put 0.1g and 0.1g into 10ml N, N dimethylformamide and acetone solvent respectively, after magnetic stirring is completely dissolved, take 3-8ml solution into another beaker, add 0.4g PVDF, magnetic stirring at 50°C After the solution was completely transparent, 0.3ml of oleic acid and 0.03ml of oleylamine were added, and after magnetic stirring for half an hour, a uniform and transparent perovskite precursor solution was obtained.

[0037] Step 2) Electrode preparation: Use a screen printing machine to fix the prefabricated screen printing screen on the screen printing machine, adjust the position between the scraper frame and the screen, and place the substrate PET at a suitable position on the transmission table , put the low-temperature silver paste on the screen to print the finger electrode, after printing, put it in an oven at 80-120°C for 0.5-1h to dry.

[0038] Step 3) Electrospinning composite fiber: us...

Embodiment 2

[0041] Step 1) raw material preparation: the weighed CsI, PbI 2 Put 0.2g and 0.2g into 10ml N, N dimethylformamide and 6ml acetone solvent respectively, after magnetic stirring is completely dissolved, take 3ml solution into another beaker, add 1.5g PVDF, and magnetically stir at 50°C until After the solution was completely transparent, 0.3ml of oleic acid and 0.03ml of oleylamine were added, and after magnetic stirring for half an hour, a uniform and transparent perovskite precursor solution was obtained.

[0042] Step 2) Electrode preparation: Use a screen printing machine to fix the prefabricated screen printing screen on the screen printing machine, adjust the position between the scraper frame and the screen, and place the substrate PET at a suitable position on the transmission table , Print low-temperature silver paste on the screen. Then put it in an oven at 80°C for 30 minutes to dry.

[0043] Step 3) Electrospinning composite fibers:

[0044] Use a 14G single-hole...

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Abstract

The invention provides a method for preparing a flexible piezoelectric nanogenerator based on a perovskite polymer composite material. The steps include: first preparing a perovskite precursor spinning solution, and then using a screen printing process to form a low-temperature silver paste Prepare silver finger electrodes on PET substrates as raw materials, and then use the electrospinning machine to use the finger electrodes pasted on the high-speed drum as the receiving plate, set different parameters for high-pressure spinning to obtain composite fibers, and finally based on the composite fibers Assembly of flexible piezoelectric nanogenerators. The invention provides a method for preparing a flexible piezoelectric nanogenerator based on a perovskite polymer composite material, and the prepared flexible piezoelectric nanogenerator has good stability.

Description

technical field [0001] The invention relates to the technical field of piezoelectric nanogenerators, in particular to a method for preparing a flexible piezoelectric nanogenerator based on a perovskite polymer composite material. Background technique [0002] Piezoelectric nanogenerator is a conversion device that utilizes the piezoelectric effect to realize mechanical energy-electric energy. It can convert various forms of mechanical energy in the environment into electrical energy through piezoelectric material modification and device conversion efficiency improvement to drive small commercial electronics. Devices and wireless transmission equipment, etc., have the advantages of simple structure, small size and little influence from the external environment, and are favored by many energy harvesting technology researchers. However, the widely studied piezoelectric semiconductor materials and piezoelectric ceramic materials require high temperature in the synthesis process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00H02N2/00
CPCD01D5/003D01D5/0069D01D5/0092D01D5/0084H02N2/22
Inventor 侯新梅杨涛王恩会周林林郑子祥陈慧颖
Owner UNIV OF SCI & TECH BEIJING
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