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Oxygen-deficient tungsten oxide/polypyrrole core-shell nanowire array electrochromic film and preparation method thereof

A tungsten oxide nanowire, pyrrole core-shell nanotechnology, applied in chemical instruments and methods, color-changing fluorescent materials, coatings, etc., can solve problems such as limiting practical applications, achieve large-scale industrial production, and enhance long-term cycle stability. the effect of increased velocities and rates of ion diffusion

Active Publication Date: 2019-12-20
合肥庐阳科技创新集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, tungsten oxide can only change a single color from transparent to dark blue, which largely limits its practical applications

Method used

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  • Oxygen-deficient tungsten oxide/polypyrrole core-shell nanowire array electrochromic film and preparation method thereof
  • Oxygen-deficient tungsten oxide/polypyrrole core-shell nanowire array electrochromic film and preparation method thereof
  • Oxygen-deficient tungsten oxide/polypyrrole core-shell nanowire array electrochromic film and preparation method thereof

Examples

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preparation example Construction

[0035] The present invention also provides a method for preparing an oxygen-deficient tungsten oxide / polypyrrole core-shell nanowire array electrochromic film described in the above technical solution, comprising the following steps:

[0036] The FTO conductive glass is placed in acetone, ethanol and water in sequence and then ultrasonically cleaned and dried to obtain a pretreated FTO conductive glass;

[0037] Mixing citric acid powder, methanol and cyclohexanol and then adding tungsten hexachloride powder to obtain a precursor solution;

[0038] The pretreated FTO conductive glass is soaked in the precursor solution and then subjected to hydrothermal reaction, and then the FTO conductive glass is taken out, washed with alcohol, washed with water and freeze-dried in sequence to obtain an oxygen-deficient tungsten oxide nanometer containing a large number of oxygen vacancies. FTO conductive glass with line array film;

[0039] The FTO conductive glass of the oxygen-deficient...

Embodiment 1

[0055] A preparation method of a tungsten oxide / polypyrrole core-shell nanowire array electrochromic material, the specific steps are as follows:

[0056] (1) The FTO conductive glass was placed in acetone, ethanol, and deionized water in sequence for ultrasonic cleaning for 15 minutes, and then dried under an infrared lamp.

[0057] (2) Preparation of precursor solution: Add 0.6g of citric acid powder to 50mL of methanol and 10mL of cyclohexanol and stir until completely dissolved, then pour 0.16g of tungsten hexachloride powder into the above solution and stir until Yellow and transparent, made into a precursor solution;

[0058] (3) Add the precursor solution prepared in step (2) into the autoclave, soak and fix the FTO conductive glass vertically in the precursor solution, and heat the autoclave to 180°C (heating rate 8°C / min) , kept for 9h; after the hydrothermal reaction, the FTO conductive glass was taken out, the surface was washed several times with alcohol and deion...

Embodiment 2

[0074] Same as Example 1, the only difference is that the freeze-drying temperature in the freeze-drying oven is -80°C, and the scanning electron photo of the electrochromic material obtained is similar to Example 1, at 0.6V, 0V, -0.2V, -0.5V , -0.8V under light gray, reddish-brown, blue-gray, yellow-green and blue-green, respectively.

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Abstract

The invention provides an oxygen-deficient tungsten oxide / polypyrrole core-shell nanowire array electrochromic film and application, an all-solid-state lithium metal battery and a preparation method of the electrochromic film, and belongs to the field of battery materials. A lithium-conducting channel of the oxygen-deficient tungsten oxide / polypyrrole core-shell nanowire array electrochromic filmprovided in the invention shifts from a single LAGP ceramic lithium-conducting channel to a two-way lithium-conducting channel by polymer and LAGP simultaneously, thereby improving the diffusion rateof lithium ions, reducing side reactions between an electrolyte and a lithium metal, stabilizing an interface reaction between the lithium metal and the electrolyte, preventing a dendritic crystal from growing and being connected with positive and negative electrodes to cause a short circuit, preventing a lithium dendrite crystal from piercing a separator and further causing a short circuit, improving the capacity retention efficiency of a battery, and prolonging the cycle life of the battery; the battery can maintain stable performance at different temperatures; and at the same time, the thickness of the oxygen-deficient tungsten oxide / polypyrrole core-shell nanowire array electrochromic film can be adjusted as needed.

Description

technical field [0001] The invention relates to the technical field of electrochromic films, in particular to an oxygen-deficient tungsten oxide / polypyrrole core-shell nanowire array electrochromic film and an oxygen-deficient tungsten oxide / polypyrrole core-shell nanowire array electrochromic film and its Preparation. Background technique [0002] Electrochromism means that when a small voltage is applied, a material will undergo a reversible and stable color change, mainly a reversible and permanent change in light transmittance and (or) reflectivity. The applications of electrochromic devices mainly include: smart windows, automotive anti-glare mirrors, microelectronics, energy-saving billboards, stealth fighters and other military products, etc. Electrochromic devices have become a hot material in the field of scientific research in recent years due to their low energy consumption, improvement of living comfort, and great application prospects in the fields of stealth m...

Claims

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Application Information

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IPC IPC(8): C03C17/34C09K9/00
CPCC03C17/009C03C17/34C03C2217/425C03C2217/94C03C2218/111C03C2218/115C09K9/00
Inventor 张勇冯涛史英迪汤凯秦永强舒霞崔接武王岩吴玉程
Owner 合肥庐阳科技创新集团有限公司
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