electrochromic device

Abstract

The present application discloses an electrochromic device. The electrochromic device includes: a first intermediate layer and a second intermediate layer; an electrochromic layer disposed between the first intermediate layer and the second intermediate layer, wherein the electrochromic layer includes: a first transparent conductive layer and a second transparent conductive layer, and at least one electrochromic material layer disposed between the first transparent conductive layer and the second transparent conductive layer; a first edge protection seal that seals all edges of the first intermediate layer; and a second edge protection seal that seals all edges of the second intermediate layer, wherein: the electrochromic layer is located between the first intermediate layer and the second intermediate layer, and the first edge protection seal and the second edge protection seal together seal all edges of the electrochromic layer.

Description

[0001] This application is a divisional application. The application number of the original application is 201911095986.4, the application date is November 11, 2019, and the name is “Electrochromic film with edge protection”. Technical Field

[0002] The present invention relates generally to electrochromic devices, and more particularly to electrochromic devices with edge protection and methods for making the same. Background Art

[0003] Electrochromism generally refers to the reversible change in the optical properties of a material when an electric potential is applied. In particular, electrochromic materials exhibit reversible color changes due to electrochemical redox reactions caused by the application of an electric field.

[0004] Electrochromic materials can be used in a variety of applications, including photovoltaic devices, field-effect transistors, organic light-emitting diodes, general printed electronics, anti-glare windows, display systems, etc.

[0005] Typically, electrochromic materials are sandwiched between rigid substrates to create devices. Flexible substrate-based electrochromic films offer advantages over traditional electrochromic glass in terms of weight, ease of transportation, and the ability to be applied to curved surfaces.

[0006] For applications involving smart window technology, electrochromic materials need to be integrated with glass substrates (e.g., glass windows) for use. The integration process typically requires that the electrochromic film be sandwiched between two glass plates with an interlayer (e.g., polyvinyl butyral (PVB) and SentryGlas, etc.). These packages are then pressurized and heated at a certain pressure and temperature. After the lamination process, the interlayer will be cured and the electrochromic film will be fixed between the glass plates. In order to change the chemical and physical properties, certain additives are present in the interlayer. These additives can penetrate into the multilayer electrochromic film and adversely affect the electrochromic film. As a result, the performance and life of the electrochromic film can be severely damaged.

[0007] Therefore, there is a need for an improved electrochromic film design that addresses the above and other problems. Summary of the Invention

[0008] This disclosure provides a method for preparing an electrochromic film with edge protection to prevent undesirable materials, oxygen, and moisture from penetrating the edges of the electrochromic film. The electrochromic film may include a first electrode, a second electrode, an electrochromic material deposited on at least the first electrode, a charge storage layer deposited on the second electrode, and a solid polymer electrolyte disposed between the electrochromic material and the charge storage layer.

[0009] Typically, the electrochromic film can be inserted between two interlayers and laminated between two glass panes. In some embodiments, the edges of the electrochromic film and the interlayer are covered with an edge protection material to protect the electrochromic film from unwanted materials from the interlayer and the surrounding environment. These unwanted materials include certain additives within the interlayer as well as oxygen and moisture from the surrounding environment, which can adversely affect the performance and lifespan of the electrochromic film.

[0010] According to one embodiment of the present disclosure, a method for preparing an electrochromic device includes disposing an edge protection material on a first substrate and a second substrate, disposing a first intermediate layer and a second intermediate layer within the edge protection material on the first substrate and the second substrate, respectively, wherein the edge protection material surrounds edges of the first intermediate layer and the second intermediate layer, and inserting an electrochromic film between the first intermediate layer and the second intermediate layer, wherein the edge protection material prevents chemicals in the first intermediate layer and the second intermediate layer from entering the electrochromic film. The method may also include pressing the first substrate and the second substrate toward each other and heating the first intermediate layer and the second intermediate layer to fix the electrochromic film between the first substrate and the second substrate.

[0011] According to another embodiment of the present disclosure, an electrochromic film includes a first electrode, a second electrode, an electrochromic material deposited on at least the first electrode, a charge storage layer deposited on the second electrode, and a solid polymer electrolyte disposed between the electrochromic material and the charge storage layer. In this embodiment, at least the edges of the electrochromic material are covered by an edge protection material.

[0012] According to another embodiment of the present disclosure, an electrochromic device includes a first glass plate, a first interlayer positioned on the first glass plate, a second glass plate, a second interlayer positioned on the second glass plate, and an electrochromic film positioned between the first and second interlayers. The electrochromic film may include a first electrode, a second electrode, an electrochromic material deposited on at least the first electrode, a charge storage layer deposited on the second electrode, and a solid polymer electrolyte positioned between the electrochromic material and the charge storage layer. At least an edge of the electrochromic material is covered by an edge protection material. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Preferred non-limiting embodiments of the present invention may be more readily understood by reference to the accompanying drawings, in which:

[0014] Figure 1 is a simplified schematic diagram of a laminate structure having an electrochromic film disposed therein according to an exemplary embodiment.

[0015] Figure 2 is a simplified schematic diagram of an electrochromic film according to an exemplary embodiment.

[0016] Figure 3is a perspective view of an electrochromic film according to an exemplary embodiment.

[0017] Figures 4A to 4C A method of preparing an electrochromic film with edge protection according to an exemplary embodiment is shown.

[0018] Figure 5 A flow chart illustrating a method of preparing an electrochromic device according to an exemplary embodiment.

[0019] Figure 6 An electrochromic film with edge protection according to an exemplary embodiment is shown.

[0020] Figure 7 A laminated electrochromic film with edge protection is shown according to one exemplary embodiment.

[0021] Figure 8 A non-laminated electrochromic film with edge protection according to another exemplary embodiment is shown.

[0022] Figure 9 Another laminated electrochromic film with edge protection according to another exemplary embodiment is shown.

[0023] Figure 10A A comparison of the performance and lifespan of a laminated electrochromic film with edge protection and a laminated electrochromic film without edge protection according to an embodiment is shown.

[0024] Figure 10B A comparison of the performance and lifespan of a non-laminated electrochromic film with edge protection and a non-laminated electrochromic film without edge protection according to an embodiment is shown. DETAILED DESCRIPTION

[0025] In the following description, some specific details are set forth to provide a full understanding of various embodiments of the present invention. However, those skilled in the art will appreciate that the present invention can be practiced without these details. In addition, although various embodiments of the present invention are disclosed herein, many adjustments and modifications can be made within the scope of the present invention according to the common knowledge of those skilled in the art. Such modifications include replacing any aspect of the present invention with known equivalents to obtain the same results in substantially the same manner.

[0026] Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," should be construed as having an open inclusive meaning, i.e., "including, but not limited to," unless the context requires otherwise. Throughout the specification, the recitation of numerical ranges is intended to serve as shorthand notation that each separate value within the range includes the values defining the range, and each separate value is incorporated into the specification as if individually recited herein. In addition, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.

[0027] Throughout this specification, references to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment, but may do so in some cases. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0028] Figure 1 A simplified schematic diagram of a laminate structure having an electrochromic film inserted therein is shown according to one exemplary embodiment. The various components of the laminate structure (eg, substrate layer, adhesive layer, and electrochromic film) are shown spaced apart for clarity only.

[0029] like Figure 1 As shown, the laminate structure 100 includes a first adhesive interlayer 102, which is interposed between the first surface 104 of the electrochromic film 106 and the first substrate 108. The laminate structure 100 also includes a second adhesive interlayer 110, which is interposed between the second surface 112 of the electrochromic film 106 and the second substrate 114. Figure 1 In the embodiment shown in FIG. 1 , the first surface 104 and the second surface 112 correspond to opposite surfaces of the electrochromic film 106 .

[0030] The first adhesive interlayer 102 and / or the second adhesive interlayer 110 may include a material (e.g., a thermosetting polymer material) configured to firmly bond (e.g., cross-link) the electrochromic film 106 to the first substrate 108 and the second substrate 114. Thus, the first adhesive interlayer 102 and / or the second adhesive interlayer 110 are configured to hold the laminated structure 100 together even when broken / fractured, and prevent the laminated structure 100 from breaking into large, sharp fragments.

[0031] Figure 2An exemplary, non-limiting schematic diagram of an electrochromic film 200 according to one embodiment is shown. It is worth noting that the present invention can be implemented in combination with other devices / features / components described herein, for example, those devices / features / components described with reference to other embodiments / aspects. Figure 2 The electrochromic film 200 can be used in various applications and / or arrangements that may or may not be mentioned in the illustrative embodiments / aspects described herein. For example, in some embodiments, the electrochromic film 200 may include a Figure 2 In addition, unless otherwise specified, as will be appreciated by those skilled in the art after reading this disclosure, one or more components of the electrochromic film 200 can be of conventional materials, designs, and / or manufactured using known techniques (e.g., sputtering, chemical vapor deposition (CVD), physical vapor deposition (PVD), plasma enhanced chemical vapor deposition (PECVD), spray coating, slot die coating, dip coating, spin coating, printing, etc.).

[0032] like Figure 2 As shown, the electrochromic film 200 includes a first transparent substrate 202 and a second transparent substrate 204 that are parallel to and spaced apart from each other. The first substrate 202 and the second substrate 204 can have the same or different sizes, and can be made of the same or different materials. Suitable materials for the first substrate 202 and / or the second substrate 204 can include, but are not limited to, glass, polymer materials, plastic materials, and / or other materials that are transparent in at least a portion of the visible region of the electromagnetic spectrum. In some embodiments, the first substrate 202 and the second substrate 204 can include glass.

[0033] like Figure 2 As shown, a first transparent conductive film 206 is deposited on the inner surface 208 of the first substrate 202 to serve as an electrode. A second transparent conductive film 210 is also deposited on the inner surface 212 of the second substrate 204 to serve as an electrode. The first conductive film 206 and the second conductive film 210 can have the same or different sizes, include the same or different materials, etc. The first conductive film 206 and the second conductive film 210 can also each independently have a single layer or multilayer structure. Suitable materials for the first conductive film 206 and the second conductive film 210 can include, but are not limited to, tin-doped indium oxide (ITO), fluorine-doped indium oxide, antimony-doped indium oxide, zinc-doped indium oxide, aluminum-doped zinc oxide, silver nanowires, metal mesh, and combinations thereof and / or other such transparent materials that exhibit sufficient electrical conductivity. In a preferred aspect, the first conductive film 206 and the second conductive film 210 can each include an electrode layer containing tin-doped indium oxide (ITO).

[0034] The electrochromic device 200 may further include a power supply (not shown) configured to supply a voltage between the first conductive film 206 and the second conductive film 210 .

[0035] like Figure 2 As further shown, an electrochromic material layer 214 is deposited on the inner surface 216 of the first conductive film 206. The electrochromic material layer 214 is configured to cause a reversible color change when reduced (gaining electrons) or oxidized (losing electrons) by an applied current. In some embodiments, the electrochromic material layer 214 can be configured to change from a transparent state to a colored state, or from one colored state to another colored state, when oxidized or reduced. In some embodiments, the electrochromic material layer 214 can be a polyelectrochromic material in which more than two redox states are possible, and thus can exhibit multiple colors.

[0036] In some embodiments, the electrochromic material layer 214 may include an organic electrochromic material, an inorganic electrochromic material, a mixture thereof, etc. The electrochromic material layer 214 may also be a reduced colored material (i.e., a material that becomes colored when it gains electrons) or an oxidized colored material (i.e., a material that becomes colored when it loses electrons).

[0037] In some embodiments, the electrochromic material layer 214 may include metal oxides such as MoO3, V2O5, Nb2O5, WO3, TiO2, Ir(OH)x, SrTiO3, ZrO2, La2O3, CaTiO3, sodium titanate, potassium niobate, and combinations thereof. In some embodiments, the electrochromic material layer 214 may include a conductive polymer such as poly-3,4-ethylenedioxythiophene (PEDOT), poly-2,2'-bithiophene, polypyrrole, polyaniline (PANI), polythiophene, polyisobenzothiophene, poly(o-aminophenol), polypyridine, polyindole, polycarbazole, polyquinone, octacyanophthalocyanine, and combinations thereof. In addition, in some embodiments, the electrochromic material layer 214 may include materials such as viologen, anthraquinone, phenothiazine, and combinations thereof. Additional examples of electrochromic materials, particularly those comprising multicolor electrochromic polymers, can be found in U.S. Patent Application No. 15 / 399,839, filed January 6, 2017, the entire contents of which are incorporated herein by reference.

[0038] like Figure 2 Also shown, a charge storage layer 218 is deposited on the inner surface 220 of the second conductive film 210. Suitable materials for the charge storage layer 218 may include, but are not limited to, vanadium oxide, binary oxides (e.g., CoO, IrO2, MnO, NiO, and PrO2). x ), ternary oxides (e.g., Ce x V y O z )wait.

[0039] In some embodiments, the charge storage layer 218 can be replaced with an optional second electrochromic material layer that can have the same or different dimensions as the first electrochromic material layer 214, include the same or different components, etc.

[0040] The electrochromic device 200 further includes an electrolyte layer 222 disposed between the electrochromic material layer 214 and the charge storage layer 218. In some embodiments, the electrolyte layer 222 may include a liquid electrolyte known in the art. In some embodiments, the electrolyte layer 222 may include a solid electrolyte, including but not limited to Ta2O5, MgF, Li3N, LiPO4, LiBO2-Li2SO4, and the like. In some embodiments, the electrolyte layer 222 may include a polymer-based electrolyte including an electrolyte salt (e.g., LiTFSI, LiPF6, LiBF4, LiClO4, LiCF3SO3, LiN(CF3SO2)2, LiSbFg, LiAsF6, LiN(CF3CF2SO2)2, (C2H5)4NBF4, (C2H5)3CH3NBF4, LiI, etc.), a polymer matrix (e.g., polyethylene oxide, polyvinylidene fluoride (PVDF), polymethyl methacrylate (PMMA), polyethylene oxide (PEO), polyacrylonitrile (PAN), polyvinylnitrile, etc.) and one or more optional plasticizers (e.g., glutaronitrile, succinonitrile, adiponitrile, fumaric acid nitrile, etc.). Additional examples of dielectric materials, particularly those comprising solid polymer electrolytes, can be found in U.S. Patent Application Nos. 15 / 399,852, filed January 6, 2017, and 15 / 487,325, filed April 13, 2017, both of which are incorporated herein by reference in their entireties.

[0041] Figure 3 is a perspective view of an electrochromic film 300 according to an exemplary embodiment. Figure 2 and Figure 3 The difference is that in Figure 3 The electrochromic film 300 is shown in a perspective view only, without Figure 2 The first transparent substrate 202 and the second transparent substrate 204. Figure 2 Similarly, the electrochromic film 300 includes a first transparent conductive film 306 and a second transparent conductive film 310. Between the first transparent conductive film 306 and the second transparent conductive film 310, the electrochromic film 300 further includes a dielectric layer 322, which is disposed between the electrochromic material layer 314 and the charge storage layer 318. In some embodiments, the polymer dielectric layer 322 is a solid polymer electrolyte, and the solid polymer electrolyte includes the above-mentioned Figure 2The electrolyte salt and polymer matrix are described in the examples.

[0042] Figures 4A to 4C A method 400 of making a laminate electrochromic device with edge protection is shown according to one exemplary embodiment. Figure 4A A process for manufacturing a glass sheet with edge protection for lamination with an electrochromic film is shown. Figure 4A In the process, a glass plate 402 is first prepared. Then, four edge seals 405 made of edge protection material are arranged on each of the four edges and on the top of the glass plate 402. The edge protection material can be selected from polyvinylsiloxane (PVS), SentryGlas, thermoplastic polyurethane (TPU), ethylene vinyl acetate (EVA), etc. Next, an intermediate layer 403 is arranged on the center of the glass plate 402, within the area defined by the four edge seals 405, to form a first intermediate layer substrate portion 410. The intermediate layer 403 can be made of polyvinyl butyral (PVB), PVB with additional UV protection, etc. As described above, the intermediate layer may contain undesirable chemicals that may adversely affect the performance and life of the electrochromic film. Typically, these chemicals can often penetrate into the electrochromic film through the bonding of the film via the dielectric layer. Through edge protection, the edges of the intermediate layer 403 are sealed, and chemicals will not be able to enter the electrochromic film. Another intermediate layer substrate can be formed using the same process. As Figure 4B As shown, two intermediate substrate portions 410a, 410b are formed, each having an intermediate layer surrounded by edge protection material. The electrochromic film 401 is provided and laminated between the two intermediate substrate portions 410a, 410b. Figures 1 to 3 Manufacturing electrochromic film 401. Figure 4C , an electrochromic film 420 with edge protection is shown laminated between two glass sheets. The interlayer can be cured by pressing the glass sheets and heating the electrochromic device.

[0043] Figure 5 Show summary Figures 4A to 4C Flowchart 500 of the steps shown. In step 502, edge protection material is disposed on a first substrate and a second substrate. In step 504, a first intermediate layer and a second intermediate layer are disposed within the edge protection material on the first substrate and the second substrate, respectively, wherein the edge protection material surrounds the edges of the first intermediate layer and the second intermediate layer. In step 506, an electrochromic film is inserted between the first intermediate layer and the second intermediate layer. The edge protection material can prevent chemicals in the first intermediate layer and the second intermediate layer from entering the electrochromic film. Method 500 can also include an optional step 508 of pressing the first substrate and the second substrate toward each other and heating the first intermediate layer and the second intermediate layer to fix the electrochromic film between the first substrate and the second substrate.

[0044] Figure 6 FIG. 6 is a cross-sectional view 600 of two electrochromic films 606 and 610, wherein the junction and edges of the two electrochromic films are covered by edge protection material (e.g., epoxy layer 605). Figure 6 In the embodiment of the present invention, the electrochromic material layer 614, the dielectric layer 622, and the charge storage layer 618 are sandwiched between the two electrochromic films 606 and 610. After being cured using heat or ultraviolet light, the epoxy resin 605 can serve as an effective oxygen and moisture blocker. Using this method, the electrochromic film roll can be stored in the ambient environment for a longer period of time without sacrificing performance and life. The epoxy resin can also be replaced with other suitable materials. In some embodiments, the edges of at least one of the first electrode and the second electrode, the electrochromic material, the solid polymer dielectric, and the charge storage layer are covered by an edge protection material.

[0045] Figure 7 A laminated electrochromic device 700 with edge protection is shown according to an exemplary embodiment. The laminated electrochromic device 700 includes a first substrate 702 (e.g., a glass plate) at the bottom, a second substrate 704 (e.g., a glass plate) at the top, a first intermediate layer 703a located on the first substrate 702, a second intermediate layer 703b located below the second substrate 704, an electrochromic film 701, and edge protection materials 705 and 715 located between the first and second substrates 702 and 704 and surrounding the intermediate layers 703a and 703b and the electrochromic film. The edge protection materials 705 and 715 are compatible with the electrochromic film 701 and the substrates, but are resistant to the chemicals in the intermediate layers 703a and 703b. The electrochromic film 701 is pre-positioned so that its edges fit within the edge protection materials 705 and 715. Following a normal lamination process, such as autoclave, the edges of the electrochromic film 701 will be protected by edge protection materials 705 , 715 .

[0046] Figure 8 An electrochromic film 800 with edge protection is shown according to another exemplary embodiment. Figure 8 The electrochromic film in FIG. 800 includes two sides 801a and 801b, one serving as an anode and the other as a cathode. Upper side 801a is covered on the left side by an edge protection material, and lower side 801b is covered on the right side by an edge protection material. The edge-covered electrochromic film 800 can be rolled up and easily stored in an ambient environment for extended periods without sacrificing performance or lifespan.

[0047] Figure 9 Another electrochromic film 900 with edge protection according to another exemplary embodiment is shown. Figure 8 similar, Figure 9The electrochromic film in FIG. 1 includes two sides 901a and 901b, one side serving as an anode and the other serving as a cathode. The edges 901a and 901b of the electrochromic film are covered by edge protection materials (e.g., epoxy layers 905 and 915). After curing using heat or UV light, the epoxy resins 905 and 915 can act as effective oxygen and moisture blockers. The electrochromic film can then be laminated between two substrates (e.g., glass plates) using the lamination process described above. Figure 7 Similarly, the laminated electrochromic device 900 includes a first substrate 902 (e.g., a glass plate), a second substrate 904 (e.g., a glass plate), an intermediate layer 903 between the first substrate 902 and the second substrate 904, and an electrochromic film with edge protection laminated within the intermediate layer 903.

[0048] In some embodiments, the edge protection material, such as epoxy resin 805 / 815 / 905 / 915, can be conductive, enabling it to be used as an electrode in the above-described embodiments. By using a conductive material as the edge protection material, the electrochromic film manufacturing process can save a step in manufacturing the electrode. Alternatively, the conductive edge protection material can conduct current to the electrode layer and / or charge storage layer.

[0049] Figure 10A A comparison of the performance and lifespan of a laminated electrochromic film with edge protection and a laminated electrochromic film without edge protection according to an embodiment is shown. Curve 1002 is the original performance of the laminated electrochromic film, for example, the performance when not degraded. The curve shows the response of the normalized transparency of the laminated electrochromic film that has not degraded over time. Curve 1004 shows the response of the normalized transparency of the laminated electrochromic film without edge protection over time. Curve 1006 shows the response of the normalized transparency of the laminated electrochromic film with edge protection over time. By comparison Figure 10A Looking at curves 1002, 1004, and 1006, it can be seen that the device without edge protection (curve 1004) exhibits very poor stability. After 1 hour of accelerated degradation at 100°C, the device's switching response has already slowed down. In contrast, the device with edge protection (curve 1006) shows only limited signs of degradation after 1 month of accelerated degradation stress testing. Therefore, edge protection can better prevent degradation of the laminated electrochromic film.

[0050] Figure 10BA comparison of the performance and lifespan of a non-laminated electrochromic film with edge protection and a non-laminated electrochromic film without edge protection according to an embodiment is shown. Curve 1012 is the original performance of the non-laminated electrochromic film, for example, the performance when not degraded. This curve shows the response of the normalized transparency of the non-degraded non-laminated electrochromic film over time. Curve 1014 shows the response of the normalized transparency of the non-laminated electrochromic film with edge protection over time. Figure 10B As shown in FIG, after 1 week of accelerated degradation stress testing, the device with edge protection (curve 1014) still maintains a reasonably good switching speed, i.e., similar to the original curve 1012. Therefore, with edge protection, the non-laminated electrochromic film is able to prevent degradation, preserving a long process window for further lamination processes.

[0051] This specification describes a protective edge for an electrochromic film that is typically manufactured at low cost via a roll-to-roll process. Since in practical applications of electrochromic films, such as smart windows, the electrochromic film needs to be laminated between substrates (e.g., two glass panes), without using the above-described method, the choice of laminating interlayer materials is limited, and storage and transportation require more specialized environments and conditions. The above-described embodiments help promote the application of electrochromic films in the window industry.

[0052] The scope of the invention described and claimed herein is not limited by the specific preferred embodiments disclosed herein, as these embodiments are intended as illustrations of several aspects of the invention. Indeed, various modifications of the invention in addition to those shown and described herein will become apparent to those skilled in the art from the foregoing description. Such modifications are also intended to fall within the scope of the appended claims.

Claims

1. An electrochromic device comprising: a first substrate, a second substrate, an edge protection material, wherein the edge protection material is disposed on the first substrate and the second substrate; a first intermediate layer and a second intermediate layer, wherein the first intermediate layer and the second intermediate layer are disposed within edge protection material on the first substrate and the second substrate, respectively, wherein the edge protection material surrounds edges of the first intermediate layer and the second intermediate layer, and an electrochromic film, wherein the electrochromic film is interposed between the first intermediate layer and the second intermediate layer, wherein the edge protection material prevents chemicals in the first intermediate layer and the second intermediate layer from entering the electrochromic film, Four first edge seals made of edge protection material, wherein the four first edge seals are disposed on each of the four edges and on top of the first substrate, and the first intermediate layer is disposed on the center of the first substrate within an area defined by the four first edge seals, wherein the edge protection seals the edges of the first intermediate layer and prevent chemicals from entering the electrochromic film; Four second edge seals made of edge protection material, wherein the four second edge seals are arranged on each of the four edges and on top of the second substrate, and the second intermediate layer is arranged on the center of the second substrate and in the area defined by the four second edge seals. Through edge protection, the edges of the second intermediate layer are sealed and chemicals will not be able to enter the electrochromic film.

2. The device according to claim 1, wherein The first and second edge seals are resistant to chemicals from the first and second intermediate layers, and the edge protection material is conductive and serves as an electrode for the electrochromic film.

3. The device according to claim 1, wherein The edge protection material is epoxy resin.

4. The device according to claim 1, wherein The edge protection material is selected from polyvinylsiloxane PVS, thermoplastic polyurethane TPU or ethylene vinyl acetate EVA.

5. The device according to claim 1, wherein The electrochromic film includes a first transparent conductive film and a second transparent conductive film, wherein the electrochromic film further includes a dielectric layer between the first transparent conductive film and the second transparent conductive film, and the dielectric layer is arranged between the electrochromic material layer and the charge storage layer. The dielectric layer is a solid polymer electrolyte, and the solid polymer electrolyte includes an electrolyte salt and a polymer matrix.

6. The device according to claim 5, wherein The first transparent conductive film and the second transparent conductive film each include an electrode layer containing tin-doped indium oxide (ITO).

7. An electrochromic device comprising: a first glass plate; a first intermediate layer located on the first glass plate; a second glass plate; a second intermediate layer located on the second glass sheet, and an electrochromic film located between the first intermediate layer and the second intermediate layer, wherein the electrochromic film comprises: the first electrode, the second electrode, an electrochromic material deposited on at least the first electrode; a charge storage layer deposited on the second electrode; and a solid polymer electrolyte disposed between the electrochromic material and the charge storage layer, wherein at least the edge of the electrochromic material is covered by an edge protection material, Four first edge seals made of edge protection material, wherein the four first edge seals are provided on each of the four edges and on top of the first glass sheet, and the first interlayer is provided on the center of the first glass sheet within an area defined by the four first edge seals, wherein the edge protection seals the edges of the first interlayer and prevents chemicals from entering the electrochromic film; Four second edge seals made of an edge protection material, wherein the four second edge seals are provided on each of the four edges and on top of the second glass sheet, and the second interlayer is provided on the center of the second glass sheet within an area defined by the four second edge seals, wherein the edge protection seals the edges of the second interlayer and prevents chemicals from entering the electrochromic film; The first and second edge seals are electrically conductive and serve as electrodes of the electrochromic film.

8. The device according to claim 7, wherein The solid polymer electrolyte includes an electrolyte salt and a polymer matrix.

9. The device according to claim 7, wherein The electrochromic film includes a first transparent conductive film and a second transparent conductive film, and each of the first transparent conductive film and the second transparent conductive film includes an electrode layer containing tin-doped indium oxide (ITO).

10. The device according to claim 7, wherein The electrochromic film is in direct contact with the first intermediate layer and the second intermediate layer.

11. The device according to claim 7, wherein The first intermediate layer and the second intermediate layer directly press the electrochromic film.

12. The device according to claim 7, wherein The edge protection material is epoxy resin.

13. The device according to claim 7, wherein The edge protection material is selected from polyvinylsiloxane PVS, thermoplastic polyurethane TPU or ethylene vinyl acetate EVA.

14. The device according to claim 7, wherein The first intermediate layer and the second intermediate layer are made of polyvinyl butyral (PVB).

15. The device according to claim 7, wherein The first and second edge seals are resistant to chemicals from the first and second intermediate layers.

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