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Modified PVA electrolyte membrane for flexible super capacitor, and preparation method and application thereof

A technology for supercapacitors and electrolyte films, which is applied in the manufacture of hybrid capacitor electrolytes and hybrid/electric double layer capacitors. It can solve problems that limit practical applications, low swelling, and affect the electrochemical performance of assembled capacitors, and achieve easy large-scale industrialization. The effect of low production and product cost and convenient operation

Inactive Publication Date: 2017-09-19
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physically crosslinked PVA gel electrolyte exhibits fluidity at high temperatures due to the destruction of the physical crosslink points, which limits its practical application; while the chemically crosslinked PVA gel electrolyte has a low swelling degree in inorganic acids, Affects the electrochemical performance of its assembled capacitors

Method used

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  • Modified PVA electrolyte membrane for flexible super capacitor, and preparation method and application thereof
  • Modified PVA electrolyte membrane for flexible super capacitor, and preparation method and application thereof
  • Modified PVA electrolyte membrane for flexible super capacitor, and preparation method and application thereof

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preparation example Construction

[0049] In the aforementioned preparation method, the way of removing water can be either natural air drying or drying.

[0050] The foregoing electrode material may be a flexible substrate covering the electrode sheet of graphene material, but it is not limited to graphene, and may also be other electrode materials.

[0051] In a typical embodiment of the present invention, a process for preparing a modified PVA gel electrolyte flexible supercapacitor based on the "one-pot" method may include: adding PVA to the aqueous solution, heating and stirring until it is dissolved, and then adding the modified filler (Silica, modified silica, montmorillonite, modified montmorillonite, etc.), continue to stir until the mixture is evenly mixed and then cool down, add the inorganic salt solution (sodium chloride, sodium hydroxide, potassium chloride, hydrogen Potassium oxide, etc.) is completely dissolved, and the modified PVA gel electrolyte is obtained after it is cooled to room temperature; ...

Embodiment 1

[0053] Example 1: Weigh 6g of PVA and pour it into a flask containing 54mL of deionized water, stir on a magnetic stirrer with heating function, set the initial reaction temperature to 88°C, and stir in circulating condensed water After 2h, it was completely dissolved, and a PVA aqueous solution with a mass fraction of 10% was obtained. After the reaction temperature dropped to 60°C, 1.5 parts of montmorillonite dispersed in 10 mL of deionized water was poured into the reaction flask, and stirring was continued for 5 hours until the mixture was uniform. Maintaining the reaction temperature, slowly drip 3 g of potassium hydroxide electrolyte dissolved in 10 mL of deionized water into the reaction flask, continue to stir for 2 hours, turn off heating, and naturally cool to room temperature to obtain a modified PVA gel electrolyte.

[0054] After the modified PVA gel electrolyte is spin-coated on a glass sheet and dried, the modified electrolyte solid film can be obtained for testin...

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Abstract

The invention discloses a modified PVA electrolyte membrane for a flexible super capacitor, and a preparation method and application thereof. The manufacturing method comprises: polyving akohol, inorganic salt and a modified filler are mixed uniformly in a solvent and reaction is carried out for no more than 50h at a temperature of 0 to 100 DEG C; a modified PVA gel electrolyte is processed to form a membrane; and then drying is carried out to form the modified PVA electrolyte membrane. According to the invention, the preparation process is simple; the operation becomes convenient; the product cost is low; the energy consumption is low; controllability is high; and large-scale industrial production of the membrane can be realized easily. Meanwhile, the modified PVA electrolyte membrane has high conductivity and good thermal stable performance. The flexible super capacitor based on the modified PVA electrolyte membrane has the improved specific capacitance value and cycling stability.

Description

Technical field [0001] The invention specifically relates to a modified PVA electrolyte film for flexible supercapacitors, its preparation method and application. Background technique [0002] In recent years, with the rapid development of flexible electronic equipment, the demand for high-performance flexible energy storage power supply devices has received increasing attention. Among them, a new type of green energy storage device-flexible supercapacitor has received widespread attention, but the current system is restricted by the shortcomings of flexible electrode materials such as low specific capacity, low electrolyte conductivity, poor thermal stability, and complex material synthesis processes. Actual demand. [0003] In flexible supercapacitors, solid electrolyte is one of the key components. Generally, the performance of the electrolyte has the following requirements: high conductivity, low corrosivity, high decomposition voltage, high use temperature; preferably non-to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/84H01G11/56
CPCY02E60/13H01G11/84H01G11/56
Inventor 李铁张珽徐雁丁海燕
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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