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Novel nano-composite electrochromic material, device and preparation method thereof

An electrochromic material and nanocomposite technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of poor optical activity, slow color conversion, and poor cycle reversibility.

Inactive Publication Date: 2009-06-03
EAST CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above-mentioned materials with cathodic coloring properties such as WO 3 , V 2 o 5 , MnO 3 、TiO 2 Has deficiencies to overcome, such as WO 3 As an important inorganic electrochromic material, it has been widely studied, but it still cannot meet the requirements of practical applications due to its shortcomings such as poor optical activity, slow color conversion, and poor cycle reversibility.

Method used

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  • Novel nano-composite electrochromic material, device and preparation method thereof
  • Novel nano-composite electrochromic material, device and preparation method thereof
  • Novel nano-composite electrochromic material, device and preparation method thereof

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preparation example Construction

[0110] The preparation method of the device is described in detail below:

[0111] The electrochromic device is made by a method comprising the following steps:

[0112] (1) Covering the conductive electrode layer (b) and the electrochromic layer (c) sequentially on the transparent glass substrate layer (a); the electrochromic layer (c) is the nanocomposite electrochromic material of the present invention;

[0113] (2) Covering the conductive electrode layer (f) and the optional ion storage layer (e) sequentially on the transparent glass substrate layer (g);

[0114] (3) coating the ion-conducting layer (d) on the substrate obtained in step (1), then covering the substrate obtained in step (2), and then applying pressure to flatten and press;

[0115] (4) Finally, encapsulate and protect the conductive layer and the conductive glass layer with an insulating packaging material (h) to obtain the desired electrochromic device.

[0116] In a specific embodiment, the preparation ...

Embodiment 1

[0150] Nano Ag / WO 3 Composite electrochromic film ( nanocomposite electrochromic material )

[0151] Nano Ag / WO 3 Preparation of composite film: ITO conductive glass (5 × 1cm 2 ) with Al 2 o 3 The powder (0.05 μm) was ground and polished on suede, ultrasonicated in acetone, ethanol and water for 5 minutes, and dried in a vacuum oven.

[0152] The ITO conductive glass (5×1cm 2 ) is fixed on the bracket in the high-vacuum multi-electrode coating machine. Under the pre-vacuum degree, the residual gas in the bell jar is removed, and then it is pumped to a high vacuum degree, and then the current is passed through, and the Ag is directly heated by resistance heating. Evaporation can uniformly deposit a layer of orange nano-Ag film on the ITO conductive glass.

[0153] The nano-Ag film is orange-yellow when observed with the naked eye; measured by ultraviolet spectrophotometry, the nano-Ag film absorbs light with a wavelength of 460nm; measured by quartz film thickness me...

Embodiment 2

[0158] Glass / ITO / Nano Ag-WO 3 Electrochromic devices based on composite membrane / polymer electrolyte / ITO / glass

[0159] Lithium perchlorate was vacuum-dried at 150°C for 12 h to obtain anhydrous lithium perchlorate (LiClO 4 ), the anhydrous lithium perchlorate that takes 0.17g is dissolved in the acetonitrile (ACN) of 4g, then adds polymethyl methacrylate (PMMA) 0.4g, oil bath heating and vigorous stirring make PMMA dissolve completely, Add propylene carbonate (PC) 1.14g as plasticizer at last, stir to obtain colorless and transparent PMMA-LiClO 4 - PC polymer solid electrolyte.

[0160] With the nano Ag / WO prepared in embodiment 1 3 The ITO conductive glass of the composite film is used as the electrochromic layer, the conductive layer and the transparent glass substrate, and the colorless and transparent PMMA-LiClO 4 -PC polymer solid electrolyte is coated on the composite film, covered with another conductive layer and a transparent glass substrate, and then applied...

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Abstract

The invention provides a novel nano-composite electrochromic material, comprising a metal nano-material layer and an inorganic chromic material layer which covers the metal nano-material layer; wherein, the metal nano-material layer is a nano-Ag film layer; the inorganic chromic material layer is a WO3 layer, a TiO2 layer or the combination of the WO3 layer and the TiO2 layer. The invention also provides an electrochromic device and a preparation method for the nano-composite electrochromic material. The composite electrochromic material has excellent electrochromic performance.

Description

technical field [0001] The invention relates to the field of electrochromic materials and devices, in particular to a novel nanocomposite electrochromic material with excellent electrochromic performance, a device and a preparation method thereof. Background technique [0002] Electrochromic materials have the characteristic of reversible color change under the action of an external electric field or current. Because the material has the characteristics of continuously adjustable optical properties, low operating voltage, low power consumption, no radiation, wide viewing angle, open circuit memory, etc., it is widely used in information display devices, smart windows with adjustable transmittance and reflectivity, information storage without power consumption, etc. Color-changing sunglasses, glare-free reflectors, etc. have broad application prospects. [0003] Electrochromic materials should meet the following requirements, (1) have good electrochemical redox reversibility...

Claims

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Application Information

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IPC IPC(8): C09K9/00
Inventor 金利通庞月红黎小宇施国跃
Owner EAST CHINA NORMAL UNIVERSITY
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