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Problems solved by technology
[0004] At present, magnetron sputtering is mostly used to prepare large-area tungsten oxide electrochromic films, but there are many problems: (1) high cost and high energy consumption
A continuous magnetron sputtering instrument costs tens of millions and consumes a lot of power
(2) The tungsten oxide film prepared by magnetron sputtering is too dense, which is not conducive to the intercalation and extraction of lithium ions during the discoloration process, and there are problems such as long response time and poor energy utilization.
Method used
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Embodiment 1
[0029] a. Dissolve 5g of tungstic acid in 60mL of 30% hydrogen peroxide, heat in an oil bath to 95oC, stir until a clear solution is obtained, add 1.44g of molybdenum oxide, 70mL of ethylene glycol and 70mL of deionized water into the resulting clear solution, Raise the temperature of the oil bath to 120°C, condense and reflux for 10 hours to obtain nano-tungsten oxide sol, then centrifuge at 10,000rpm for 20min, pour off the supernatant, and wash the precipitate with ionized water and ethanol respectively;
[0030] b. Dissolve ethyl cellulose in ethanol at room temperature, the mass ratio of ethyl cellulose to ethanol is 1:10, stir to obtain a clear and transparent sol, take 15g of the obtained sol and add 12g terpineol and 3g molybdenum doping The tungsten oxide nano-sol was prepared by rotary evaporation of the organic solvent at 90°C to obtain the molybdenum-doped tungsten oxide nano-slurry;
[0031] c. Sonicate the ITO or FTO conductive glass with detergent, deionized wat...
Embodiment 2
[0036] a. Dissolve 5g of tungstic acid in 60mL of 30% hydrogen peroxide, heat the oil bath to 95°C, and stir until a clear solution is obtained. Add 1.44g of molybdenum oxide, 70mL of ethylene glycol and 70mL of deionized water to the obtained clear solution, raise the temperature of the oil bath to 110°C, and reflux for 12 hours to obtain tungsten oxide nanosol. Then, centrifuge at a speed of 10000rpm / min for 20min, pour off the supernatant; finally use ionized water and ethanol to wash the precipitate respectively;
[0037] b. Dissolve ethyl cellulose in ethanol at room temperature, the mass ratio of ethyl cellulose to ethanol is 1:5, and stir to obtain a clear and transparent sol. Next, 9 g of terpineol and 3 g of molybdenum-doped tungsten oxide nano-sol were added to 18 g of clarified ethylcellulose sol, and the organic solvent was rotary evaporated at 90° C. to prepare molybdenum-doped tungsten oxide nano-slurry;
[0038]c. Sonicate the ITO or FTO conductive glass with d...
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Abstract
The invention discloses a preparation method of a low-energy-consumption screen-printed molybdenum-doped tungsten oxide nano-structure electrochromic film. According to the technical scheme, the method is characterized by comprising the following steps of: dissolving tungstic acid in hydrogen peroxide, performing oil bath heating and stirring until a clear solution is obtained, adding molybdenum oxide, ethylene glycol and deionized water into the clear solution, heating an oil bath pot, conducting reflux condensation to obtain a molybdenum-doped tungsten oxide nano sol, and conducting centrifugation and washing for standby use; dissolving ethyl cellulose in ethanol at room temperature, performing stirring to obtain a clear and transparent sol, adding terpilenol and the molybdenum-doped tungsten oxide nano sol prepared in the previous step into the sol, and carrying out rotary evaporation of an organic solvent to obtain a molybdenum-doped tungsten oxide nano slurry; and uniformly attaching the molybdenum-doped tungsten oxide nano slurry to an ITO or FTO conductive glass substrate by adopting a silk-screen printing or blade coating method, conducting calcining by using a muffle furnace, and performing natural cooling to obtain the low-energy-consumption screen-printed molybdenum-doped tungsten oxide nano-structure electrochromic film.
Description
[0001] This application is a divisional application. The original application name is: A method for preparing a screen-printed molybdenum-doped tungsten oxide nanostructure electrochromic film. The application number is: 2017102708795, and the application date is: 20170424. 【Technical field】 [0002] The invention belongs to the field of electrochromism, and in particular relates to a method for preparing an electrochromic film with a low-energy screen printing molybdenum-doped tungsten oxide nanostructure. 【Background technique】 [0003] When a voltage is applied to the material, the phenomenon of reversible color change exhibited by the material is called electrochromism. Electrochromic materials include organic materials and inorganic materials. Inorganic materials have attracted much attention due to their good cycle stability. Oxidation Tungsten is a representative substance in inorganic materials. [0004] At present, magnetron sputtering is mostly used to prepare larg...
Claims
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