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A quasi-solid electrolyte film for electrochromism and its preparation and application

An electrolyte film, electrochromic technology, applied in applications, flat products, household appliances, etc., can solve the problems of easy leakage, poor chemical stability, difficult to encapsulate, etc., and achieve the effect of improving performance, low cost, and controllable thickness

Active Publication Date: 2018-12-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most commonly used electrochromic devices are liquid electrolytes, but liquid electrolytes still have many problems in practical use, such as: easy to leak, poor chemical stability and difficult to package

Method used

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  • A quasi-solid electrolyte film for electrochromism and its preparation and application
  • A quasi-solid electrolyte film for electrochromism and its preparation and application
  • A quasi-solid electrolyte film for electrochromism and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] At room temperature, weigh 10.96g of dried lithium perchlorate and place it in a 250mL beaker, add 100mL of N,N-dimethylformamide and stir until the lithium perchlorate is completely dissolved, and prepare 1mol / L lithium perchlorate N,N-dimethylformamide solution, weighed 0.97g polyvinylidene fluoride and 0.03g nano-silicon dioxide and added to 2ml of the above solution, stirred evenly, and then stood for half an hour to prepare a slurry, and then the slurry The material was taken out, coated and placed on a glass substrate under a hot press, the temperature was set at 120°C, and the time was 10 minutes to prepare a transparent quasi-solid electrolyte film and assemble it into an electrochromic device.

[0033] figure 1 The scanning electron micrograph of the prepared quasi-solid electrolyte film shows that the film has a porous structure and has a certain ability to store liquid electrolyte.

[0034] figure 2 It is the impedance test diagram of the electrolyte, and ...

Embodiment 2

[0038] At room temperature, weigh 10.96g of dried lithium perchlorate and place it in a 250mL beaker, add 100mL N,N-dimethylformamide and stir until lithium perchlorate is completely dissolved, and prepare 1mol / L lithium perchlorate N , N-dimethylformamide solution, weighed 0.89g of polyvinylidene fluoride and 0.11g of nano silicon dioxide and added to 2mL of the above solution, stirred evenly, and then stood for half an hour to prepare a slurry, and then the slurry Take out the coating and place it on the glass substrate under a hot press, set the temperature at 120°C, and press for 10 minutes to prepare a transparent quasi-solid electrolyte film, and assemble it into an electrochromic device.

[0039] Figure 6 It is the impedance test chart of the electrolyte membrane, and the result shows that the conductivity of the electrolyte membrane is 1.91*10 ‐3 S / cm.

[0040] In order to understand the electrochromic performance of the quasi-solid electrolyte film prepared in the ...

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Abstract

The invention relates to a quasi-solid electrolyte film applied to electrochromism as well as preparation and application thereof. A raw material mixed slurry comprises lithium perchlorate, a solvent, polyvinylidene fluoride and silicon dioxide. A preparation method of the quasi-solid electrolyte film comprises the following steps: carrying out vacuum drying on the lithium perchlorate to remove water, then preparing a lithium perchlorate solution, taking the polyvinylidene fluoride and the silicon dioxide to dissolve in the lithium perchlorate solution to prepare a slurry capable of being thermally pressed to form a film, taking a proper amount of the slurry, coating the slurry on a glass substrate, thermally pressing to form a film, cooling to room temperature to obtain the quasi-solid electrolyte film which is applied to electrochromic devices. The method is simple in preparation process and low in cost; the prepared quasi-solid electrolyte film is high in conductivity, can be applied to the electrochromic devices, is capable of effectively improving the electrochromism performance of the devices, can get rid of the limit that a polymer electrolyte film is difficult in large-area production, and can achieve the application prospect of industrialization of preparation of electrolyte films through a thermal pressing method.

Description

technical field [0001] The invention belongs to the field of electrochromic materials and their preparation and application, in particular to a quasi-solid-state electrolyte film for electrochromism and its preparation and application. Background technique [0002] Electrochromism refers to the reversible change of color and transparency of materials under the action of an applied electric field or electric current, which is due to the optical properties (transmittance, reflectance or absorptivity) of materials in the ultraviolet, visible or near infrared region It is caused by a stable and reversible change under the action of an external electric field. The basic structure of an electrochromic device is composed of a glass or transparent substrate, a transparent conductive layer, an electrochromic layer, an electrolyte layer and other multi-layer films. The electrolyte layer plays the role of transporting ions between the two electrodes. It is also one of the most importa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K3/24C08K3/36B29D7/01G02F1/15
CPCB29D7/01C08J5/18C08J2327/16C08K3/24C08K3/36C08L2203/16C08L2203/20G02F1/15C08L27/16
Inventor 王宏志刘学龙李海增辜为民李耀刚张青红
Owner DONGHUA UNIV
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