Bistable electrochromic energy storage glass and method of making same
By designing electrode units and storage supply units in electrochromic glass and utilizing the circulation of electrolyte between the positive and negative electrodes, the problem of the lack of bistable performance in electrochromic glass is solved. This achieves electrochromic separation and color control of the electrolyte, reduces costs, and is applicable to fields such as smart color-changing windows.
Patent Information
- Application Number
- CN202411084399.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2044-08-08
AI Technical Summary
Existing electrochromic glass suffers from poor compatibility between dimming and energy storage performance, and lacks bistable properties, which limits its widespread use in the building sector.
Design a bistable electrochromic energy storage glass, including an electrode unit, an electrolyte, and a storage supply unit. The electrolyte is circulated between the positive and negative electrode storage units by a power unit to achieve electrochromic separation of the electrolyte, avoid self-erasing phenomenon, improve bistable performance, and achieve color regulation through the redox process of functional molecules.
It achieves the separation of electrolyte under different electrochromic states, improves bistable performance, reduces costs, and has the potential to become an energy-saving material, enabling color control and energy-saving effects in smart glass.
Smart Images
Figure CN118838096B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electrochromic technology, and more specifically, to a bistable electrochromic energy storage glass and its preparation method. Background Technology
[0002] Currently, the continuous growth of the world's population has greatly increased global energy demand, making more efficient energy use crucial. Windows are among the least energy-efficient components, and various technologies have been continuously explored and optimized to achieve a balance between energy storage and energy-saving properties in smart glass.
[0003] In recent years, electrochromic technology with energy storage capabilities has also attempted to achieve compatibility between dimming and energy storage performance. However, the compatibility between dimming and energy storage performance of electrochromic glass is poor, and the high price of ITO-based electrochromic glass also limits its widespread use in the building sector. Water flow windows, with their multi-layered structure, can actively regulate the optical and thermal properties of fluids to achieve intelligent control of sunlight. They exhibit excellent performance and application value in building-integrated cooling / heating radiators or solar collectors, but efficiently achieving energy storage and dimming remains a challenge. Therefore, existing technologies struggle to achieve efficient compatibility between energy storage and energy-saving temperature control in glass materials.
[0004] In addition, electrochromic liquid devices are expected to play a significant role in energy saving, dimming and heating control of large-area smart windows due to their simple manufacturing and convenient operation, but a major challenge they face is the lack of bistable performance. Summary of the Invention
[0005] The problem addressed by this invention is how to solve the lack of bistable performance in electrochromic liquid devices.
[0006] To address the above problems, this invention provides a bistable electrochromic energy storage glass and its preparation method.
[0007] In a first aspect, the present invention provides a bistable electrochromic energy storage glass, comprising an electrode unit, an electrolyte, a power unit, and a storage supply unit. The electrode unit includes a positive electrode unit and a negative electrode unit. The electrolyte is electrochromic. The storage supply unit includes a positive electrode storage unit and a negative electrode storage unit. The positive electrode storage unit is connected to the positive electrode unit, and the negative electrode storage unit is connected to the negative electrode unit. The power unit delivers electrolyte to circulate within the positive electrode storage unit and the negative electrode storage unit, respectively.
[0008] Optionally, the electrode unit is a metal electrode, a non-metal electrode, or a carbon-based electrode.
[0009] Optionally, the electrolyte comprises functional molecules, auxiliary electrolyte and solvent, the functional molecules are in oxidized form under the action of the positive electrode unit in the positive electrode storage unit, and the functional molecules are in reduced form under the action of the negative electrode unit in the negative electrode storage unit, and the oxidized functional molecules and the reduced functional molecules have different colors.
[0010] Optionally, the solubility of the functional molecules in the solvent is 0.5-2.7 L / mol.
[0011] Optionally, the molar ratio of the functional molecules to the auxiliary electrolyte is (1-4):(1-5).
[0012] Optionally, the functional molecules comprise at least one of rhodamine, viologen, aniline, and triarylmethane and derivatives thereof, and the structure of the functional molecules is as follows:
[0013]
[0014] In the formula, X comprises O or N; R1-R8 comprises any one of H, C1-C24 alkyl, C1-C24 substituted alkyl, hydroxyl, ester, C1-C24 alkoxy, alkylamino, amino, C6-C24 aryl, and C7-C24 group containing both aromatic ring or alkane.
[0015] Optionally, the auxiliary electrolyte comprises one or more of sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, tetrabutylammonium hexafluorophosphate, and other organic and inorganic electrolytes.
[0016] Optionally, the solvent comprises one or more of acetonitrile, tetrahydrofuran, dimethyl sulfoxide, and water.
[0017] Optionally, the positive electrode storage unit and the negative electrode storage unit each comprise two glass structures, and the two glass structures are attached to each other to form a liquid storage cavity.
[0018] In a second aspect, the application provides a preparation method of the bistable electrochromic energy storage glass as described above, comprising the following steps:
[0019] S1: connecting the electrode unit to the storage supply unit through a conduit, and connecting the power unit to the conduit;
[0020] S2: selecting an electrolyte, and injecting the electrolyte into the storage supply unit;
[0021] S3: the power unit circulates the electrolyte between the positive electrode storage unit and the negative electrode storage unit.
[0022] The bistable electrochromic energy storage glass and the preparation method thereof have the following beneficial effects: the power unit delivers electrolyte to circulate in the positive electrode storage unit and the negative electrode storage unit, the electrolyte circulates in the positive electrode storage unit after passing through the positive electrode unit, the electrolyte circulates in the negative electrode storage unit after passing through the negative electrode unit, the electrolyte can be electrochromic after passing through the electrode unit, the electrolyte can be separated in the positive electrode storage unit and the negative electrode storage unit in the case of electron gain and loss, the electrolyte is separated in the positive electrode storage unit and the negative electrode storage unit, the self-erasing phenomenon caused by the mutual contact of the positive electrode and the negative electrode is avoided, the bistable performance of the bistable electrochromic energy storage glass is improved, the process of the bistable electrochromic energy storage glass from nothing to something is realized, the color regulation of the smart glass is realized by the electrochromic electrolyte, the electrolyte only needs a short voltage stimulation when the color / state is switched, and no power consumption is needed when the color / state is maintained, and only power supply is needed in the process of optical signal switching, so the bistable electrochromic energy storage glass has the potential as an energy-saving material, and the cost is reduced by abandoning ITO electrochromic. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 The structure diagram of the bistable electrochromic energy storage glass of the embodiment is shown in the figure.
[0024] Figure 2 The flowchart of the preparation method of the bistable electrochromic energy storage glass of the embodiment is shown in the figure.
[0025] Figure 3 The relationship curve between the electrical performance and different transmittances of the embodiment is shown in the figure.
[0026] Figure 4 The image comparison diagram of the optical energy glass under different charging capacity percentages of the embodiment is shown in the figure.
[0027] Figure 5 The color change diagram of the bistable electrochromic energy storage glass in the charging and discharging process of the embodiment 1 is shown in the figure.
[0028] Explanation of reference signs:
[0029] 1, storage supply unit; 11, positive electrode storage unit; 111, positive electrode liquid inlet end; 112, positive electrode liquid outlet end; 12, negative electrode storage unit; 121, negative electrode liquid inlet end; 122, negative electrode liquid outlet end; 2, conduit; 3, liquid flow direction; 4, power unit; 5, electrode unit; 51, positive electrode unit; 52, negative electrode unit. DETAILED DESCRIPTION
[0030] In order to make the above objectives, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail below with reference to the drawings. Although some embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms, and should not be interpreted as being limited to the embodiments set forth herein, but rather, these embodiments are provided in order to more thoroughly and completely understand the present application. It should be understood that the drawings and embodiments of the present application are for exemplary purposes only, and are not intended to limit the scope of protection of the present application.
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application;
[0032] As used herein, the term "includes" and its variants are open-ended, meaning "includes but is not limited to"; the term "based on" means "based, at least in part, on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments." Related terminology can be found in the description below. It is to be noted that the terms "first", "second", and the like, do not denote any order, quantity, combination, or importance, but rather are used to nomenclature different objects and / or actions. Also, the terms "first", "second", etc., are used only for the purpose of description, and are not intended to indicate or imply relative importance or an order of magnitude. Thus, a feature with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "a plurality" is two or more, unless otherwise specified.
[0033] To solve the problems in the above related technologies, the embodiment provides a kind of bistable electrochromic energy storage glass and preparation method thereof, which can be applied to intelligent color-changing window and other fields.
[0034] As Figure 1 As shown in the figure, the bistable electrochromic energy storage glass provided by the embodiment of the present application includes an electrode unit 5, an electrolyte, a power unit 4 and a storage supply unit 1. The electrode unit 5 includes a positive electrode unit 51 and a negative electrode unit 52. The electrolyte can be electrochromic. The storage supply unit 1 includes a positive electrode storage unit 11 and a negative electrode storage unit 12. The positive electrode storage unit 11 is connected to the positive electrode unit 51, and the negative electrode storage unit 12 is connected to the negative electrode unit 52. The power unit 4 circulates the electrolyte between the positive electrode storage unit 11 and the negative electrode storage unit 12.
[0035] The electrode unit 5 can be selected from an electric pile, the power unit 4 can be selected from a pump group, and the storage supply unit 1 can be selected from a liquid storage tank.
[0036] Specifically, the positive electrode storage unit 11 has a positive electrode liquid inlet end 111 and a positive electrode liquid outlet end 112, and the positive electrode liquid inlet end 111 and the positive electrode liquid outlet end 112 of the positive electrode storage unit 11 are connected to the positive electrode unit 51 through the conduit 2 respectively, and the power unit 4 is arranged between the positive electrode unit 51 and the positive electrode storage unit 11, and the power unit 4 transports the electrolyte passing through the positive electrode unit 51 into the positive electrode storage unit 11 from the positive electrode liquid inlet end 111 and flows out of the positive electrode storage unit 11 from the positive electrode liquid outlet end 112, and returns to the positive electrode unit 51. The negative electrode storage unit 12 has a negative electrode liquid inlet end 121 and a negative electrode liquid outlet end 122, and the negative electrode liquid inlet end 121 and the negative electrode liquid outlet end 122 of the negative electrode storage unit 12 are connected to the negative electrode unit 52 through the conduit 2 respectively, and the power unit 4 is arranged between the negative electrode unit 52 and the negative electrode storage unit 12, and the power unit 4 transports the electrolyte passing through the negative electrode unit 52 into the negative electrode storage unit 12 from the negative electrode liquid inlet end 121 and flows out of the negative electrode storage unit 12 from the negative electrode liquid outlet end 122, and returns to the negative electrode unit 52. The electrolyte circulates in the positive electrode storage unit 11 after passing through the positive electrode unit 51, and the electrolyte circulates in the negative electrode storage unit 12 after passing through the negative electrode unit 52, and the electrolyte can be electrochromic after passing through the electrode unit 5, realizing that the electrolyte can be separated in the positive electrode storage unit 11 and the negative electrode storage unit 12 under the condition of gaining and losing electrons.
[0037] In this embodiment, the power unit 4 transports the electrolyte to circulate in the positive electrode storage unit 11 and the negative electrode storage unit 12 along the liquid flow direction 3 respectively, and the electrolyte can be electrochromic, and the characteristics that the electrolyte is separated in the positive electrode storage unit 11 and the negative electrode storage unit 12 avoid the self-erasing phenomenon caused by the mutual contact of the positive electrode and the negative electrode, improve the bistable performance of the bistable electrochromic energy storage glass, realize the process of the bistable electrochromic energy storage glass from nothing to something, and realize the color regulation of the smart glass by means of the electrochromic electrolyte; the electrolyte only needs a short voltage stimulation when switching color / state, and does not need to consume electricity when maintaining color / state, and only needs to supply electric energy in the process of switching optical signal, so it has the potential as an energy-saving material; and the ITO electrochromic is abandoned, and the cost is reduced.
[0038] Optionally, the electrode unit 5 is a metal electrode, a non-metal electrode or a carbon-based electrode.
[0039] Specifically, the electrode unit 5 is copper, platinum, silver, etc., silicon carbide, diamond, ceramic, graphite or graphene, etc.
[0040] Optionally, the electrolyte comprises functional molecules, auxiliary electrolytes and solvents, the functional molecules are in oxidized form under the action of the positive electrode unit 51 in the positive electrode storage unit 11, and the functional molecules are in reduced form under the action of the negative electrode unit 52 in the negative electrode storage unit 12, and the oxidized functional molecules and the reduced functional molecules have different colors.
[0041] In the optional embodiment, the functional molecules are converted between the oxidized functional molecules and the reduced functional molecules through the redox process of the electrode, and the electrical energy is converted into chemical energy and stored in the storage tank, the oxidized functional molecules and the reduced functional molecules have different colors, the functional molecules only need a short voltage stimulation when the color / state is switched, and no power consumption is needed when the color / state is maintained, and only the electrical energy supply is needed in the process of switching the optical signal.
[0042] Optionally, the solubility of the functional molecules in the solvent is 0.5-2.7 L / mol.
[0043] In the optional embodiment, the solubility of the functional molecules in the solvent is high, and the transmittance effect is good, as shown in Figure 3 and Figure 4 different transmittance effects. Figure 3 (a) respectively the relationship between the charge capacity percentage (CC) and the discharge capacity percentage (DC) and the transmittance (Cc%: Charge Capacity%, Dc%: Discharge Capacity%) (b) respectively the relationship between the charge capacity percentage and the discharge capacity percentage and the transmittance at different wavelengths. Figure 4 respectively the image contrast of the light energy glass at different charge capacity percentages.
[0044] Optionally, the molar ratio of the concentration of the functional molecules to the auxiliary electrolytes is (1-4):(1-5).
[0045] Optionally, the functional molecules comprise at least one of rhodamine, viologen, aniline, and triarylmethane and derivatives thereof, and the structure of the functional molecules is as follows:
[0046]
[0047] wherein, X comprises O or N; R1-R8 comprises any one of H, C1-C24 alkyl, C1-C24 substituted alkyl, hydroxyl, ester, C1-C24 alkoxy, alkylamino, amino, C6-C24 aryl, and C7-C24 group containing both aromatic ring or alkane.
[0048] In particular, the functional molecule can be site-modified, for example, the functional molecule can be site-modified to be M2 and M6 molecules, wherein the synthesis method of the M2 molecule is shown in the following formula (wherein M2-1 is an intermediate):
[0049]
[0050] The synthesis steps of the M2-1 molecule are as follows: 2,2'-dibromo diethyl ether 1.25 mL (10.00 mmol, 1.0 eq.) and a tetrahydrofuran solution of trimethylamine 5.00 mL (10.00 mmol, 1.0 eq.) are added to a 25 mL round-bottom flask, the bottle opening is tied with a balloon, stirring, the solution is clear, and as the reaction proceeds, white solids appear in the solution, and the reaction is completed at room temperature for about 10 hours.
[0051] The synthesis steps of the M2 molecule are as follows: M2-1 molecules 1.98 g (6.82 mmol, 3.0 eq.) and 4,4'-dipyridine 0.36 g (2.27 mmol, 1.0 eq.) are added to a 25 mL round-bottom flask containing N,N-dimethylformamide 15 mL, N2 is replaced three times, and the reaction is heated in an oil bath at 100°C, the solution changes from white turbidity to clear state, and a large amount of yellow solid is subsequently generated. Thin layer chromatography is used to detect the reaction process, and the reaction is completed for about 48 h. After the reaction is completed, the yellow solid is washed with DMF three times, then washed with CH3CN three times, and then dried. M2-Br yellow solid is obtained, with a yield of 91%.
[0052] M2-Br 1.50 g (6.82 mmol) is dissolved in 20.0 mL of deionized water, and then ion exchange is performed by anion exchange resin, and the obtained solution is subjected to solvent water removal by a rotary evaporator to obtain brown solid M2, with a yield of 92%.
[0053] The synthesis method of the M6 molecule is shown in the following formula (wherein M6-1 is an intermediate):
[0054]
[0055] The synthesis of M6-1 molecule was carried out by adding 4-OH-TEMPO 1.74 g (8.53 mmol, 1.0 eq.), tetrabutylammonium bromide (TBAB, 0.39 g, 1.2 mmol) and 2,2'-dibromo diethyl ether 2.15 mL (17.06 mmol, 1.0 eq.) into a mixture of toluene (4.5 mL) and 50% sodium hydroxide aqueous solution (15 mL) at room temperature with vigorous stirring, and the reaction progress was monitored by thin layer chromatography, which was completed in about 48 h. After the reaction was completed, ~ 150 mL of methyl tert-butyl ether was added to the mixture, and the resulting mixture was washed with deionized water (100 mL) for several times. The organic layer was collected, dried over anhydrous sodium sulfate, and then evaporated to obtain a viscous red liquid. Finally, the product was purified by silica gel column chromatography using (petroleum ether: ethyl acetate = 5:1) as the eluent to obtain the desired product M6-1 red solid with a yield of 43%. The synthesized M6-1 was reduced by phenylhydrazine and tested by 1H NMR.
[0056] The synthesis of M6 molecule was carried out by adding M6-1 molecule 4.10 g (14.0 mmol, 1.0 eq.) and trimethylamine ethanol solution 70.0 mL (140.0 mmol, 10.0 eq) into a round-bottom flask. The reaction was stirred at room temperature, and the reaction progress was monitored by thin layer chromatography, which was completed in about 48 h. After the reaction was completed, the reaction mixture was concentrated under reduced pressure. The obtained viscous liquid was dissolved in deionized water (50 mL) and washed repeatedly with methyl tert-butyl ether (100 mL). The water layer was dried under reduced pressure to obtain red solid of M6-Br.
[0057] M6-Br 1.55 g (6.82 mmol) was dissolved in 20.0 mL of deionized water, and then ion exchange was carried out by anion exchange resin. The obtained solution was subjected to solvent water removal by a rotary evaporator to obtain red solid M6 with a yield of 93%.
[0058] In this alternative embodiment, site modification can increase solubility, clean energy.
[0059] Alternatively, the auxiliary electrolyte includes one or more of sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, tetrabutylammonium hexafluorophosphate, and the like organic and inorganic electrolytes.
[0060] In this alternative embodiment, the auxiliary electrolyte can assist the charge transfer of the functional molecule.
[0061] Alternatively, the solvent includes one or more of acetonitrile, tetrahydrofuran, dimethyl sulfoxide, and water, and the like common laboratory solvents.
[0062] In this alternative embodiment, common laboratory solvents are selected to reduce costs.
[0063] Optionally, the storage supply unit 1 comprises a two-piece glass structure, which is sealed and surrounded by a frame to form a liquid storage cavity.
[0064] Specifically, a common glass sheet is used, a rectangular pattern is dispensed on the glass sheet by using a dispensing machine, and a 500 um fish line (used to separate the two glass sheets) is sandwiched on the glass sheet, and then the two glass sheets are attached to obtain the high-surface-area, low-thickness flow battery single-stage storage supply unit 1 with a liquid storage cavity in the middle.
[0065] In this optional embodiment, the common glass sheet can be used to prepare the flow battery single-stage storage supply unit 1, and the ITO electrochromic is abandoned, thereby reducing the cost.
[0066] As shown in Figure 2 The application provides a preparation method of the bistable electrochromic energy storage glass, comprising the following steps:
[0067] S1: connecting the electrode unit 5 to the storage supply unit 1 through the conduit 2, and connecting the power unit 4 to the conduit 2, specifically, the positive electrode storage unit 11 has a positive electrode liquid inlet end 111 and a positive electrode liquid outlet end 112, the positive electrode liquid inlet end 111 and the positive electrode liquid outlet end 112 of the positive electrode storage unit 11 are connected to the positive electrode unit 51 through the conduit 2, respectively, the negative electrode storage unit 12 has a negative electrode liquid inlet end 121 and a negative electrode liquid outlet end 122, the negative electrode liquid inlet end 121 and the negative electrode liquid outlet end 122 of the negative electrode storage unit 12 are connected to the negative electrode unit 52 through the conduit 2, respectively;
[0068] S2: selecting an electrolyte and injecting the electrolyte into the storage supply unit 1, specifically, the power unit 4 is arranged between the positive electrode unit 51 and the positive electrode storage unit 11, the power unit 4 transports the electrolyte passing through the positive electrode unit 51 and injects the electrolyte into the positive electrode storage unit 11 from the positive electrode liquid inlet end 111, the power unit 4 is arranged between the negative electrode unit 52 and the negative electrode storage unit 12, and the power unit 4 transports the electrolyte passing through the negative electrode unit 52 and injects the electrolyte into the negative electrode storage unit 12 from the negative electrode liquid inlet end 121;
[0069] S3: the power unit 4 transports the electrolyte to circulate between the positive electrode storage unit 11 and the negative electrode storage unit 12, specifically, the power unit 4 repeatedly transports the electrolyte passing through the positive electrode unit 51 into the positive electrode storage unit 11 from the positive electrode liquid inlet end 111 and out of the positive electrode storage unit 11 from the positive electrode liquid outlet end 112, and circulates the electrolyte, and the power unit 4 transports the electrolyte passing through the negative electrode unit 52 to inject the electrolyte into the negative electrode storage unit 12 from the negative electrode liquid inlet end 121, and circulates the electrolyte.
[0070] Specifically, taking ordinary glass pieces, a point glue machine is used to point out a rectangular pattern, and then two glasses are attached to obtain a high surface area, low thickness liquid flow battery single-stage storage supply unit 1 with a liquid storage cavity in the middle. Two-stage storage supply unit 1 is connected to electrode unit 5 (electric pile) through conduit 2, and is linked with a power unit 4 micro turbine pump, as shown in Figure 1 The electrolyte is injected into the liquid storage cavity formed by the two glass enclosures. The electrolyte is circulated in the entire system along the liquid flow direction 3 by the micro turbine pump, and a bistable electrochromic energy storage glass, i.e. a smart window prototype, is obtained.
[0071] In this embodiment,
[0072] The application will be further described below in conjunction with specific examples.
[0073] Example 1
[0074] The preparation method of the bistable electrochromic energy storage glass takes the preparation of a 3*2 smart window device as an example, which includes the following steps:
[0075] S-1, ordinary glass is divided into small pieces of 3cm*2cm, and then the divided glass is placed in a mixed liquid of hydrogen peroxide:ammonia water with a volume ratio of 1:3, and is treated by standing for 30min. Then the glass is cleaned with deionized water by ultrasonic cleaning for 3 times, each time for 15min. Finally, the glass is cleaned with isopropanol and dried with a dry nitrogen gas stream to obtain clean glass pieces;
[0076] S-2, taking one of the clean glass pieces, a point glue machine is used to point out a rectangular pattern, and a 500um fishing line (separating two glasses) is placed on it. Then the two glasses are attached, and are placed at 120℃ for 10min to obtain a high surface area, low thickness liquid flow battery single-stage storage supply unit 1 (electrochromic smart window optical modulation part). Another storage supply unit 1 is prepared according to this method. The two storage supply units 1 are set as positive storage unit 11 and negative storage unit 12 respectively. The cooperation of positive unit 51 and negative unit 52, i.e. the cooperation of oxidation and reduction, makes the two storage supply units 1 as a group of electrochromic energy storage glass, and the color change of the electrolyte in the positive storage unit 11 and the negative storage unit 12 is different. Two-stage storage supply unit 1 is connected to electrode unit 5 (electric pile) through conduit 2, and is linked with a micro pump.
[0077] S-3, adding functional molecule M2, auxiliary electrolyte NaCl and solvent water in the container, the solubility of functional molecule M2 is 1.18 mol / L (in the aqueous solution of NaCl), the solubility of auxiliary electrolyte NaCl is 2 mol / L, ultrasonic dissolution, to obtain electrochromic electrolyte solution, the above electrolyte is injected into the modified storage supply unit 1, the electrolyte is circulated in the whole system by the micro turbine pump, and a bistable electrochromic energy storage glass, i.e. a smart window prototype, is obtained.
[0078] S-4, referring to Figure 5 The bistable electrochromic energy storage glass is connected with a power supply, the required voltage of the power supply stimulation is less than 1.8 V, and the charging is full in time, from a to b is the charging process, i.e. the coloring process of the modified bistable electrochromic energy storage glass, and it can be seen from the figure that the color changes from colorless to blue-violet. Similarly, from c to d is the discharging process, i.e. the bleaching process of the modified bistable electrochromic energy storage glass, and it can be seen from the figure that the color changes from blue-violet to colorless. From a to d, the whole process, the modified bistable electrochromic energy storage glass can realize the effect of electrochromism, i.e. the reversible regulation of color in the storage supply unit 1 of the flow battery.
[0079] Although the present application is disclosed as above, the protection scope of the present application is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and these changes and modifications will fall within the protection scope of the present application.
Claims
1. A bistable electrochromic energy saving glass, characterized in that, The application relates to a power supply device, which comprises an electrode unit (5), an electrolyte, a power unit (4) and a storage supply unit (1), wherein the electrode unit (5) comprises a positive electrode unit (51) and a negative electrode unit (52), the electrolyte is electrochromic, the storage supply unit (1) comprises a positive electrode storage unit (11) and a negative electrode storage unit (12), the positive electrode storage unit (11) is connected to the positive electrode unit (51), the negative electrode storage unit (12) is connected to the negative electrode unit (52), and the power unit (4) circulates the electrolyte in the positive electrode storage unit (11) and the negative electrode storage unit (12) respectively. The electrolyte comprises a functional molecule, an auxiliary electrolyte and a solvent, the functional molecule is in an oxidized form in the positive electrode storage unit under the action of the positive electrode unit, the functional molecule is in a reduced form in the negative electrode storage unit under the action of the negative electrode unit, the oxidized functional molecule and the reduced functional molecule have different colors, the solvent is water, and the solubility of the functional molecule in the solvent is 1.18-2.7 L / mol. The functional molecule comprises at least one of a viologen and a derivative thereof, and the structure general formula of the functional molecule is as follows: wherein R is a terminal quaternary ammonium ether; R1-R7 include any one of H, C1-C24 alkyl, C1-C24 substituted alkyl, a hydroxyl group, an ester group, C1-C24 alkoxy, alkylamino, an amino group, C6-C24 aryl and C7-C24 group containing an aromatic ring or an alkane. The electrode unit (5) is a metal electrode, a non-metal electrode or a carbon-based electrode.
2. The bistable electrochromic energy saving glass according to claim 1, characterized in that, The molar ratio of the concentration of the functional molecule to the auxiliary electrolyte is (1-4):(1-5).
3. The bistable electrochromic energy saving glass according to claim 1, characterized in that, The auxiliary electrolyte comprises one or more of sodium chloride, potassium chloride, sodium sulfate, potassium sulfate and tetrabutylammonium hexafluorophosphate.
4. The bistable electrochromic energy saving glass according to claim 1, characterized in that, The positive electrode storage unit (11) and the negative electrode storage unit (12) each comprise two glass structures, and the two glass structures are abutted and sealed to form a liquid storage cavity.
5. The bistable electrochromic energy-saving glass according to claim 1, characterized in that, The application further discloses a power supply device preparation method, which comprises the following steps:
6. A method of making a bistable electrochromic energy saving glass according to any one of claims 1 to 5, characterized in that, S1: connecting the positive electrode unit (51) to the positive electrode storage unit (11) through a conduit (2), connecting the negative electrode unit (52) to the negative electrode storage unit (12) through a conduit, and connecting the power unit (4) to the conduit (2); S2: selecting the electrolyte and injecting the electrolyte into the storage supply unit (1); S3: circulating the electrolyte between the positive electrode storage unit (11) and the negative electrode storage unit (12) by the power unit (4).
Citation Information
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