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PDMS-based flexible energy storage composite film and preparation method thereof

A composite film and base flexible technology, which is applied in the field of PDMS-based flexible energy storage composite film and its preparation, can solve the problems of unreported applications and achieve high dielectric, high energy storage efficiency, and good flexibility

Active Publication Date: 2021-07-23
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, PDMS has received more and more attention in dielectric and piezoelectric aspects in recent years, but its application in energy storage has hardly been reported so far.

Method used

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  • PDMS-based flexible energy storage composite film and preparation method thereof
  • PDMS-based flexible energy storage composite film and preparation method thereof
  • PDMS-based flexible energy storage composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this example, the PDMS-based flexible energy storage composite film is a substrate in PDMS, and the barium titanate nanoparticles having a particle diameter of less than 100 nm are filled, and the mass ratio of barium titanate nanoparticles and the PDMS is 1: 9.

[0032] The preparation method of the above PDMS-based flexible energy storage composite film is as follows:

[0033] S1, 1.8 g of PDMS solution was suggested to 3.6 mL of n-hexane, stirred at room temperature for 30 min, and uniformly dispersed in the n-alkane at room temperature.

[0034] S2, 0.2 g of barium titanate nanoparticles, added to the solution obtained in step S1, stirred at room temperature for 2 h, ultrasonic 30min, resulting in a mixed uniform milky white solution;

[0035] S3, 0.18 g of curing agent was added to the milky white solution obtained in step S2, and stirring was continued at room temperature for 30 min;

[0036] S4, the mixed solution obtained by step S3 is placed in a vacuum oven, an...

Embodiment 2

[0039] The PDMS-based flexible energy storage composite film provided in this example is a substrate in PDMS, and the barium titanate nanoparticles having a particle diameter of less than 100 nm are filled; the mass ratio of barium titanate nanoparticles and the PDMS is 1: 4.

[0040] The method of preparing a PDMS-based flexible energy storage composite film is as follows:

[0041] S1, 1.6 g of PDMS solution was suggested, and stirred in 3.2 mL of petroleum ether, stirred at room temperature for 30 min, and uniformly dispersed in petroleum ether at room temperature.

[0042] S2, 0.4 g of barium titanate nanoparticles, adding to a solution obtained from step (1), stirring at room temperature for 4 h, ultrasonic 30min, resulting in a mixed uniform milky white solution;

[0043] S3, 0.16 g of curing agent was added to the milky white solution obtained in step S2, and stirring was continued at room temperature for 30 min;

[0044] S4, the mixed solution obtained by step S3 is placed ...

Embodiment 3

[0047] The PDMS-based flexible energy storage composite film provided in this example is a substrate as a base having a particle diameter of less than 100 nm as a filler; the mass ratio of the titanate nanoparticles and the PDMS is 1: 19.

[0048] The method of preparing a PDMS-based flexible energy storage composite film is substantially identical to the first embodiment in that the 1.9 g of PDMS solution is weighed in step S1, adding to 3.8 ml of n-heptane; in step S2, 0.1 G barium titanate nanoparticles; in step S3, 0.19 g of curing agent is added. The film thickness of the prepared PDMS-based flexible energy storage composite film was 10 μm.

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Abstract

The invention provides a PDMS-based flexible energy storage composite film and a preparation method thereof, which belong to the field of polymer energy storage. According to the flexible composite film, polydimethylsiloxane (PDMS) is taken as a matrix, and inorganic medium filler with high dielectric constant is uniformly dispersed into the PDMS matrix according to different proportions, so that the PDMS-based flexible energy storage composite film with ultrahigh energy storage efficiency is prepared. The preparation method is simple in process and low in raw material price, and the prepared composite film has high dielectric constant, low dielectric loss, high energy storage density and high energy storage efficiency. Particularly, the energy storage density of the composite film taking the barium titanate nanoparticles as the filler is as high as 7.1 J / cm<3>, and the energy storage efficiency can be as high as 99%; for the composite film taking the barium strontium titanate nanowire as the filler, the energy storage density is up to 11.7 J / cm<3>, and meanwhile, 99% of ultrahigh energy storage efficiency can be maintained.

Description

Technical field [0001] The present invention belongs to the field of polymer energy storage, involving a PDMS-based flexible energy storage composite film and a preparation method thereof. Background technique [0002] With the increasing attention of energy sustainable development, the dielectric storage material is increasingly concerned and studied because of its ultra-fast charging capacity and high power density. The high dielectric polymer base is developed rapidly, especially ferroelectric ceramic / polymer composite. This composite is combined with the high dielectric constant of ferroelectric ceramics and the easy-to-process toughness of the polymer, which has been widely used. Currently, more polymeric materials are polyethylene (PE), polyvinylidene fluoride (PVDF), polystyrene (PS), polytetrafluoroethylene (PTFE), and two-way tension polypropylene (BOPP). However, the energy storage efficiency of these materials is generally not too high, causing a large energy loss, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K3/24C08K7/08C08J5/18
CPCC08J5/18C08J2383/04C08K3/24C08K7/08C08K2201/011C08K2201/005C08K2201/004
Inventor 郭艳艳曾春香张冲张盟赵江
Owner NANJING UNIV OF POSTS & TELECOMM
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