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Quasi-solid electrolyte for flexible electrochromic film and preparation method of quasi-solid electrolyte

A quasi-solid-state, chromic technology, applied in the field of materials, can solve the problems such as the preparation method of flexible electrochromic thin film needs to be studied, the color changing voltage is high, and the color changing range of the color changing thin film device is narrow.

Active Publication Date: 2020-10-09
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some progress has been made, there are still defects such as low ionic conductivity, high discoloration voltage after assembling electrochromic thin film devices, and narrow discoloration range of electrochromic thin film devices.
[0004] Therefore, quasi-solid-state electrolytes suitable for flexible electrochromic films and their preparation methods are still to be studied.

Method used

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  • Quasi-solid electrolyte for flexible electrochromic film and preparation method of quasi-solid electrolyte
  • Quasi-solid electrolyte for flexible electrochromic film and preparation method of quasi-solid electrolyte
  • Quasi-solid electrolyte for flexible electrochromic film and preparation method of quasi-solid electrolyte

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Experimental program
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Effect test

Embodiment 1

[0061] 1. Raw materials

[0062] Quasi-solid electrolyte includes: PVB resin, dispersant, inorganic lithium salt, nano-inorganic particles and additives;

[0063] The molecular weight of PVB resin is 70,000, and the dosage is 32.5% by weight in the quasi-solid electrolyte;

[0064] The inorganic lithium salt is lithium bis(pentafluoroethylsulfonyl)imide, and the dosage is 26.4% by weight in the quasi-solid electrolyte;

[0065] The dispersant is tetraethylene glycol dimethyl ether, and the consumption is 38.4% by weight in the quasi-solid electrolyte;

[0066] The nano-inorganic particles are hydrophobic silicon dioxide with a particle size of 7nm, calculated by weight and mass percentage in the quasi-solid electrolyte, 2.0%;

[0067] The auxiliary agent includes cyclohexylcarbodiimide, which is used in quasi-solid electrolyte by weight and mass percentage, and the dosage is 0.5%, and the antioxidant is tert-butyl p-hydroxyanisole, which is used in quasi-solid electrolyte by...

Embodiment 2

[0082] 1. Raw materials

[0083] The initial quasi-solid electrolyte includes: PVB resin, dispersant, inorganic lithium salt, nano-inorganic particles and additives;

[0084] The molecular weight of the PVB resin is 190,000, and the dosage is 37.4% by weight in the quasi-solid electrolyte;

[0085] The inorganic lithium salt is a mixture of lithium bis(pentafluoroethylsulfonyl)imide and lithium bis(fluorosulfonyl)imide with a mass ratio of 2:1, and the dosage is 13.1% by weight in the quasi-solid electrolyte;

[0086] The dispersant is ethylene glycol dimethyl ether, and the consumption is 48% by weight in the quasi-solid electrolyte;

[0087] The nano-inorganic particles are hydrophobic titanium dioxide with a particle size of 20nm, and the dosage is 0.5% by weight in the quasi-solid electrolyte;

[0088] The auxiliary agent includes a water-removing agent of hexamethyldisilazane, which is used in an amount of 0.8% by weight in the quasi-solid electrolyte; the defoamer is p...

Embodiment 3

[0096] 1. Raw materials

[0097] Quasi-solid electrolyte includes: PVB resin, dispersant, inorganic lithium salt, nano-inorganic particles and additives;

[0098] The molecular weight of the PVB resin is 120,000, and the dosage is 24% by weight in the quasi-solid electrolyte;

[0099] The inorganic lithium salt is lithium bis(trifluoromethanesulfonyl)imide, and the dosage is 37.2% by weight in the quasi-solid electrolyte;

[0100] The dispersant is tetraethylene glycol dimethyl ether, and the consumption is 36.2% by weight in the quasi-solid electrolyte;

[0101]The nano-inorganic particles are hydrophobic nano-silicon dioxide, with a particle size of 14nm, calculated by weight and mass percentage in the initial quasi-solid electrolyte, 1.4%;

[0102] Auxiliary agents include 1, (3-dimethylaminopropyl)-3-ethylcarbodiimide as a water-removing agent, in the initial quasi-solid-state electrolyte by weight and mass percentage, the amount is 1%, and the antioxidant is Dibutyl hy...

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Abstract

The invention provides a quasi-solid electrolyte for a flexible electrochromic film, a preparation method of the quasi-solid electrolyte, a flexible electrochromic film and a preparation method of theflexible electrochromic film. The quasi-solid electrolyte for the flexible electrochromic film comprises PVB resin, a dispersing agent, inorganic lithium salt, nano inorganic particles and an auxiliary agent, and the molecular weight of the PVB resin is 60000-200000. The quasi-solid electrolyte disclosed by the invention is good in ionic conductivity, light transmittance, film-forming property and cohesiveness, and the assembled flexible electrochromic film has a relatively large discoloration range at a low voltage and is excellent in overall performance.

Description

technical field [0001] The present invention relates to the field of materials. Specifically, the present invention relates to a quasi-solid-state electrolyte for flexible electrochromic films and a preparation method thereof. Background technique [0002] Electrochromism refers to the reversible change of color and transparency caused by the redox reaction of the material through the electrochemical process under the action of an external electric field or current. This change is due to the optical properties of the material in the ultraviolet, visible or near-infrared region (transmittance, reflectivity or absorptivity) caused by a stable and reversible change under the action of an applied electric field. The basic structure of an electrochromic device is composed of a multilayer structure such as a transparent substrate, a transparent conductive layer, an electrochromic layer, and an ion conductor layer. The role of the ion conductor layer is mainly to store ions in the...

Claims

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Application Information

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IPC IPC(8): G02F1/1506G02F1/1516G02F1/1523G02F1/153C08L29/14C08K3/36C08K5/06C08J5/18
CPCG02F1/1506G02F1/1516G02F1/1523G02F1/153C08J5/18C08J2329/14C08K3/36C08K5/06Y02E60/10
Inventor 邢爱臧美秀刘伟峰侯丽新王亚丽程媛刘贤豪
Owner CHINA LUCKY FILM CORP
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