TW202416033A - Manufacturing method of electrochromic film - Google Patents

Abstract

The present disclosure provides a manufacturing method for an electrochromic thin film. The manufacturing method includes: forming a color-changing reduction layer on a first conductive film; receiving a second conductive film, the second conductive film includes a first electrode area and a first non-electrode area; forming a color-changing oxidation layer on the first non-electrode area of the second conductive film; continuously supplying the second conductive film provided with the color-changing reduction layer, such that an ion-conducting colloid is formed on the color-changing reduction layer; pressing the first conductive film with the color-changing reduction layer onto the continuously supplied ion-conducting colloid, such that the color-changing reduction layer is disposed between the first conductive film and the ion-conducting colloid; and curing the ion-conducting colloid to form a solid-state electrolyte layer.

Description

Method for manufacturing electrochromic film

The present disclosure relates to a method for manufacturing an electrochromic film.

Currently, most electrochromic components on the market use hard materials such as glass substrates as the base layer, which makes it impossible to store electrochromic components during the production process. They can only be implemented in an independent sheet-type structure. Independent sheet-type electrochromic components are not conducive to mass production and their production capacity is relatively limited. Sheet-type electrochromic components are easily limited in application due to the size, shape and curvature (curved surface) of the material and cannot be widely used. In addition, in order to adapt to the size of the object during application, waste is easily generated after cutting.

According to some embodiments of the present disclosure, the present disclosure provides a method for manufacturing an electrochromic film, which includes: forming a color-changing reduction layer on a first conductive film material; receiving a second conductive film material, the second conductive film material including a first electrode region and a first non-electrode region; forming a color-changing oxide layer on the first non-electrode region of the second conductive film material; continuously supplying the second conductive film material provided with the color-changing oxide layer so that an ion-conductive colloid is formed on the color-changing oxide layer; pressing the first conductive film material provided with the color-changing reduction layer onto the continuously supplied ion-conductive colloid so that the color-changing reduction layer is located between the first conductive film material and the ion-conductive colloid; and curing the ion-conductive colloid to form a solid electrolyte layer.

In some embodiments of the present disclosure, the method for manufacturing the electrochromic film further includes: before forming the color-changing oxide layer, forming a shielding layer on the first electrode region of the second conductive film material.

In some embodiments of the present disclosure, the method for manufacturing the electrochromic film further includes: after forming the color-changing oxide layer, removing the shielding layer.

In some embodiments of the present disclosure, the ion conductive colloid further includes forming the ion conductive colloid on the first electrode region of the second conductive film material.

In some embodiments of the present disclosure, the first conductive film includes a second electrode region and a second non-electrode region, and the color-changing reduction layer is formed on the second non-electrode region of the first conductive film.

In some embodiments of the present disclosure, the method for manufacturing the electrochromic film further includes: before forming the color-changing reduction layer, forming a shielding layer on the second electrode region of the first conductive film material.

In some embodiments of the present disclosure, the method for manufacturing the electrochromic film further includes: after forming the color-changing reduction layer, removing the shielding layer.

In some embodiments of the present disclosure, the method for manufacturing the electrochromic film further includes: performing a coating step to form an electrode in the first electrode region of the second conductive film material, wherein a gap is provided between the electrode and the solid electrolyte layer.

In some embodiments of the present disclosure, the method for manufacturing the electrochromic film further includes: forming an edge sealing structure in the gap, wherein the material of the edge sealing structure includes acrylic resin, epoxy resin or a combination thereof.

In some embodiments of the present disclosure, the edge sealing structure covers the top surface of the first electrode.

According to the above-mentioned implementation method of the present disclosure, since the present disclosure plans the electrode area and the non-electrode area on the conductive film material in advance, it can be ensured that the color-changing oxide layer is only formed in the non-electrode area. In this way, there is no need to additionally remove the excess color-changing oxide layer, which greatly improves the convenience of the process and ensures that the electrode is stably formed in the electrochromic film.

The following will disclose multiple implementations of the present disclosure. For the purpose of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present disclosure. In other words, in some implementations of the present disclosure, these practical details are not necessary and therefore should not be used to limit the present disclosure.

It should be understood that relative terms such as "below" or "bottom" and "above" or "top" may be used herein to describe the relationship of one element to another element, as shown in the drawings. It should be understood that relative terms are intended to include different orientations of the device in addition to the orientation shown in the figures. For example, if the device in an accompanying figure is flipped, the elements described as being on the "below" side of other elements will be oriented on the "above" side of other elements. Therefore, the exemplary term "below" can include both "below" and "above" orientations, depending on the specific orientation of the accompanying figure. Similarly, if the device in an accompanying figure is flipped, the elements described as being "below" or "below" other elements will be oriented as being "above" other elements. Therefore, the exemplary term "below" or "below" can include both above and below orientations.

The present disclosure provides a method for manufacturing an electrochromic film, which integrates the manufacturing process of the electrochromic film into a roll-to-roll process through a special process improvement. In this way, not only can the production efficiency and yield be improved, the emission of waste gas or waste liquid be avoided, and the convenience of storage and transportation be improved, but also a roll-shaped electrochromic film can be formed to replace the traditional plate (sheet)-shaped electrochromic element. In this way, the rolled electrochromic film can be directly cut into a suitable shape and size according to the design of the back end, so that the entire electrochromic film manufacturing method is not limited by the final shape, size and curvature of the electrochromic film when it is used. In addition, since the electrode area and the non-electrode area are planned in advance in the conductive film material, it can be ensured that the color-changing oxidation/reduction layer is only formed in the non-electrode area, so there is no need to remove the excess color-changing oxidation/reduction layer, which greatly improves the convenience of the process and ensures that the electrode is stably formed in the electrochromic film. In addition, the electrochromic film prepared by the manufacturing method disclosed in the present invention can save the configuration of the frame glue (frame), that is, there is no need to introduce additional frame glue to prevent the electrolyte in the electrochromic film from leaking out, thereby greatly improving the applicability and installation convenience of the electrochromic film, so that the electrochromic film can be applied to a variety of fields. The electrochromic film disclosed herein can be applied to building curtain glass, skylights, smart windows, interior partition walls, automobile rearview mirrors or exterior mirrors, automobile sunroofs, side windows and windshields (applied in automobiles, large land transportation vehicles, subways, trams, high-speed railways, airplanes, ships, etc.), personal wearable lenses (photochromic lenses, snow goggles, safety goggles), 3C virtual reality goggles, helmet lenses, and many other fields.

Please refer to Figure 1, which shows a flow chart of a method for manufacturing an electrochromic film according to some embodiments of the present disclosure. The method for manufacturing an electrochromic film includes steps S10 to S60, wherein steps S10 to S60 can be performed in sequence. In step S10, a color-changing reduction layer is formed on a first conductive film material. In step S20, a second conductive film material is received, the second conductive film material includes a first electrode region and a first non-electrode region (the first electrode region and the first non-electrode region are planned on the second conductive film material). In step S30, a color-changing oxide layer is formed on the first non-electrode region of the second conductive film material. In step S40, a second conductive film material provided with a color-changing oxide layer is continuously supplied, so that an ion-conducting colloid is formed on the color-changing oxide layer. In step S50, a first conductive film material provided with a color-changing reduction layer is pressed onto the continuously supplied ion-conducting colloid, so that the color-changing reduction layer is located between the first conductive film material and the ion-conducting colloid. In step S60, the ion-conducting colloid is cured to form a solid electrolyte layer. In the following description, each of the above steps will be described in detail through Figures 2 to 3H, wherein Figure 2 is a schematic diagram of the process of manufacturing the film-like stack 100 according to some embodiments of the present disclosure, Figures 3A to 3H are schematic diagrams of cross-sections of the manufacturing method of the electrochromic film 1000 according to some embodiments of the present disclosure at different steps, and Figures 4A to 4C are schematic diagrams of the manufacturing method of the electrochromic film 1000 according to some embodiments of the present disclosure.

First, please refer to FIG. 3A. In step S10, a color-changing reduction layer 120 is formed on the first conductive film 110. In some embodiments, the color-changing reduction layer 120 can be formed on the surface 111 of the first conductive film 110 that is continuously supplied through a roll-to-roll process. In some embodiments, the first conductive film 110 may include a substrate 115 and an indium tin oxide conductive film 117 disposed on the surface 116 of the substrate 115, wherein the material of the substrate 115 may include polyethylene terephthalate, and the thickness H1 of the substrate 115 may be between 38 microns and 188 microns, preferably between 75 microns and 125 microns, and more preferably between 100 microns and 125 microns, so that the first conductive film 110 has both a certain bearing capacity and good flexibility, thereby facilitating integration into the roll-to-roll process. In some embodiments, the surface resistance of the indium tin oxide conductive film 117 may be between 5Ω/□ and 50Ω/□, so that the electrochromic film 1000 has appropriate electrical specifications.

In some embodiments, the color-changing reduction layer 120 can be formed by evaporation or sputtering, so that the color-changing reduction layer 120 is disposed on the surface 118 of the indium tin oxide conductive film 117 facing away from the substrate 115. The color-changing reduction layer 120 formed by evaporation or sputtering can have good material density and material distribution uniformity, so it is not easy to fall off or crack, and stably provides ions when the electric field changes. It is to be noted that, compared with the use of spin coating, electroplating, wet coating and other processes, the use of evaporation or sputtering to form the color-changing reduction layer 120 has its advantages. Specifically, the use of spin coating, electroplating, wet coating and other processes easily leads to poor slurry adhesion, which makes the color-changing reduction layer 120 easy to fall off, resulting in the inability to change color or reducing the service life. In some embodiments, the material of the color-changing reduction layer 120 may include tungsten oxide. In some embodiments, the thickness H2 of the color-changing reduction layer 120 may be between 50 nm and 800 nm, preferably between 100 nm and 600 nm, and more preferably between 100 nm and 400 nm, so that the color-changing reduction layer 120 can stably provide ions (stably produce color changes) when the electric field changes, has good flexibility and is not too thick, thereby facilitating integration into the roll-to-roll process.

Next, please refer to FIG. 3B , in step S20, a second conductive film material 130 is received, and the second conductive film material 130 includes a first electrode region ES1 and a first non-electrode region NS1. In detail, the first electrode region ES1 is a region for setting an electrode (e.g., a positive or negative electrode) later, and the first non-electrode region NS1 is a region for setting a layer other than the electrode later. In some embodiments, after planning the first electrode region ES1 and the first non-electrode region NS1, a shielding layer 180 may be formed on the first electrode region ES1 to completely cover the first electrode region ES1. In detail, the shielding layer 180 may be a peelable adhesive formed by screen printing, spraying or transfer, and the peelable adhesive material may include UV-curable low-viscosity silicone, polyurethane resin or a combination thereof, so as to facilitate easy removal thereof later. Specifically, please refer to Figures 4A to 4C, which show top views of the first electrode region ES1 and the first non-electrode region NS1 of the rolled second conductive film material 130 according to some embodiments of the present disclosure. The embodiment of Figure 4A shows that the first electrode region ES1 of the second conductive film material 130 has a rectangular shape. The embodiment of Figure 4B shows that the first electrode region ES1 of the second conductive film material 130 has an "L" shape. The embodiment of FIG. 4C shows that the first electrode region ES1 of the second conductive film material 130 has a "U" shape. In addition, in the embodiments of FIG. 4A to FIG. 4C, the first electrode region ES1 is completely covered by the shielding layer 180. In short, the first electrode region ES1 of the second conductive film material 130 can have various possible configurations and shapes, and is not limited to the embodiments disclosed herein.

Next, please continue to refer to FIG. 3B. In step S30, a color-changing oxide layer 140 is formed on the second conductive film material 130. In some embodiments, the color-changing oxide layer 140 can be formed on the surface 131 of the continuously supplied second conductive film material 130 through a roll-to-roll process. Since the first electrode region ES1 of the second conductive film material 130 has been covered by the shielding layer 180, the color-changing oxide layer 140 can be formed on the first non-electrode region NS1 of the second conductive film material 130 and on the shielding layer 180 corresponding to the first electrode region ES1, that is, the color-changing oxide layer 140 directly contacts the first non-electrode region NS1 of the second conductive film material 130 and the shielding layer 180. In some embodiments, the second conductive film material 130 may include a substrate 135 and an indium tin oxide conductive film 137 disposed on a surface 136 of the substrate 135, wherein the material of the substrate 135 may include polyethylene terephthalate, and the thickness H3 of the substrate 135 may be between 38 microns and 188 microns, preferably between 75 microns and 125 microns, and more preferably between 100 microns and 125 microns, so that the second conductive film material 130 has a certain bearing capacity and good flexibility, and is thus easy to integrate into a roll-to-roll process. In some embodiments, the surface resistance of the indium tin oxide conductive film 137 may be between 5Ω/□ and 50Ω/□, so that the electrochromic film 1000 has suitable electrical specifications. It is worth noting that by using the same material, thickness and specification to form the first conductive film material 110 and the second conductive film material 130, the electrochromic film 1000 can have better performance in terms of structural stability and electrical stability.

In some embodiments, the color-changing oxide layer 140 can be formed by evaporation or sputtering, so that the color-changing oxide layer 140 is disposed on the surface 138 of the indium tin oxide conductive film 137 facing away from the substrate 135. The color-changing oxide layer 140 formed by evaporation or sputtering can have good material density and uniform material distribution, and is not easy to fall off or crack, and can stably provide ions when the electric field changes. It should be noted that compared with using spin coating, electroplating, wet coating and other processes, using evaporation or sputtering to form the color-changing oxide layer 140 has its advantages. Specifically, using spin coating, electroplating, wet coating and other processes can easily lead to poor slurry adhesion, which can easily cause the color-changing reduction layer 120 to fall off, resulting in failure to change color or reduced service life. In some embodiments, the material of the color-changing oxide layer 140 may include nickel oxide. In some embodiments, the thickness H4 of the color-changing oxide layer 140 may be between 100 nanometers and 800 nanometers, preferably between 200 nanometers and 700 nanometers, and more preferably between 400 nanometers and 600 nanometers, so that the color-changing oxide layer 140 can stably accept ions (stably produce color changes) when the electric field changes, and has good flexibility and is not too thick, thereby facilitating integration into a roll-to-roll process. In some embodiments, since the color-changing reduction layer 120 and the color-changing oxide layer 140 have different reaction speeds, the thickness H4 of the color-changing oxide layer 140 can be adjusted to be at least 100 nanometers greater than the thickness H2 of the color-changing reduction layer 120, so that the color-changing oxide layer 140 and the color-changing reduction layer 120 can be matched to produce better electrochromic performance.

In some embodiments, the shielding layer 180 can be removed after the color-changing oxide layer 140 is formed (see FIG. 3C ). When removing the shielding layer 180, the color-changing oxide layer 140 disposed on the shielding layer 180 can be removed at the same time, so that the second conductive film material 130 originally located under the shielding layer 180 is exposed. In other words, after removing the shielding layer 180, the second conductive film material 130 and the color-changing oxide layer 140 disposed on the first non-electrode region NS1 of the second conductive film material 130 can be formed. In some embodiments, the shielding layer 180 can be removed by tearing off. Since a material with low affinity (adhesion, adhesion) with the indium tin oxide conductive film 137 is selected as the material of the shielding layer 180, the shielding layer 180 can be easily torn off without destroying or damaging the indium tin oxide conductive film 137. In some embodiments, after removing the shielding layer 180, a solution such as 75% ethanol or acetone can be used to clean the surface 131 of the second conductive film material 130 originally located under the shielding layer 180.

Subsequently, please refer to FIG. 2 and FIG. 3D simultaneously. In step S40, the second conductive film material 130 provided with the color-changing oxide layer 140 is continuously supplied so that the ion conductive colloid G is formed on the color-changing oxide layer 140. In more detail, the second conductive film material 130 provided with the color-changing oxide layer 140 can be transported in a roll-to-roll process by the rotation of the first transport wheel R1 (see FIG. 2), so that the second conductive film material 130 provided with the color-changing oxide layer 140 can be continuously and uninterruptedly supplied. At the same time, the ion conductive gel G is continuously provided to the first conveying wheel R1, so that the surface 141 of the color-changing oxide layer 140 facing away from the second conductive film material 130 can receive the ion conductive gel G provided by the sprayer M. In some embodiments, the ion conductive gel G is further formed on the first electrode region ES1 of the second conductive film material 130, that is, the ion conductive gel G not only contacts the color-changing oxide layer 140, but also contacts the first electrode region ES1 of the second conductive film material 130, and forms a climbing region SL between the color-changing oxide layer 140 and the first electrode region ES1 of the second conductive film material 130. However, in other embodiments, the ion conductive gel G can be formed only on the surface 141 of the color-changing oxide layer 140 through the design of a roll-to-roll process.

In some embodiments, the coating speed of the sprayer M may be between 1 m/min and 20 m/min, that is, the ion conductive colloid G may be coated on the surface 141 of the continuously supplied color-changing oxide layer 140 at a speed of 1 m/min to 20 m/min, so that the ion conductive colloid G may be arranged on the surface 141 of the color-changing oxide layer 140 in an appropriate amount and at an appropriate density. Specifically, if the coating speed of the spraying machine M is greater than 20 m/min, the content of the ion conductive colloid G carried per unit area on the surface 141 of the color-changing oxide layer 140 may be too low, that is, the distribution of the ion conductive colloid G on the surface 141 of the color-changing oxide layer 140 is too sparse, and the color-changing oxide layer 140 cannot be closely bonded to the subsequent color-changing oxide layer. The original layer 120 and the color-changing oxide layer 140; if the coating speed of the spray coating machine M is less than 1 meter/minute, the surface 141 of the color-changing oxide layer 140 may carry too much ion conductive gel G per unit area, which not only easily causes glue overflow during the subsequent pressing period, but also easily causes unnecessary waste of materials. In a preferred embodiment, the coating speed of the spray coating machine M can be between 2 meters/minute and 6 meters/minute, thereby achieving a better bonding effect.

On the other hand, controlling the coating speed of the spray coating machine M within the above range can also help control the thickness H5 of the ion conductive gel G formed on the surface 141 of the color-changing oxide layer 140, so that the thickness H5 of the ion conductive gel G can be controlled between 10 microns and 100 microns. This can not only improve the stability of the film material (for example, the second conductive film material 130 configured with the ion conductive gel G and the color-changing oxide layer 140) during transportation, but also avoid the overflow of the glue during the subsequent pressing period, and ensure that the solid electrolyte layer 150 formed by the ion conductive gel G after subsequent curing has good ionic conductivity. Specifically, if the thickness H5 of the ion conductive gel G is less than 10 microns, a break may be formed during subsequent pressing, resulting in a discontinuous distribution of the formed solid electrolyte layer 150, and thus failing to provide good ion conductivity; and if the thickness H5 of the ion conductive gel G is greater than 100 microns, subsequent pressing may be difficult, and the thicker the thickness H5 of the ion conductive gel G, the slower the electron conduction efficiency, resulting in a slower color change speed, and not conducive to forming the "thin film" electrochromic film 1000 emphasized in the present disclosure. In a preferred embodiment, the thickness H5 of the ion conductive gel G can be further controlled to be between 20 microns and 50 microns, thereby better achieving the above effect. In some embodiments, the thickness H5 of the ion conductive gel G formed on the surface 141 of the color-changing oxide layer 140 is the thickness H5 of the solid electrolyte layer 150 after curing.

It is worth noting that the present disclosure further uses a specially improved ion conductive gel G to integrate the coating of the ion conductive gel G into the roll-to-roll process, and the ion conductive gel G can be finally cured into a solid electrolyte layer 150, so that the final electrochromic film 1000 can omit the configuration of the frame glue (this part will be described in more detail below), so that the electrochromic film 1000 can be configured according to objects of different shapes and curvatures, greatly improving the applicability and installation convenience of the electrochromic film 1000, so that the electrochromic film 1000 can be applied to a variety of fields.

In detail, the preparation method of the ion conductive gel G may include the following steps. First, lithium perchlorate (LiClO ₄ ) is added to polycarbonate (PC) and stirred for 8 to 12 hours to uniformly disperse and mix, thereby forming an electrolyte mixture. Then, the electrolyte mixture is added to the UV curable glue and stirred for 8 to 12 hours with a homogenizer to uniformly disperse and mix, and then a photoinitiator is added and stirred for 0.5 to 2 hours to form the ion conductive gel G. In some embodiments, the content of the electrolyte mixture may be between 30 parts by weight and 40 parts by weight, the content of the UV-curable adhesive may be between 60 parts by weight and 70 parts by weight, and the content of lithium perchlorate may be between 1 wt% and 15 wt% based on the total weight of the electrolyte mixture. In detail, if the content of the electrolyte mixture is greater than 40 parts by weight (or the content of the UV-curable adhesive is less than 60 parts by weight), and the content of lithium perchlorate is greater than 15 wt%, it may cause the lithium salt (lithium perchlorate) in the ion-conducting gel G to be too much, making it difficult to disperse evenly and easily aggregate into lumps (clumps, precipitation), and the content of the UV-curable adhesive may be too little, causing the local block in the ion-conducting gel G to fail to fully cure, resulting in glue overflow (or If the content of the electrolyte mixture is less than 30 parts by weight (or the content of the UV-curable adhesive is greater than 70 parts by weight), and the content of lithium perchlorate is less than 1wt%, the lithium salt (lithium perchlorate) in the ion conductive gel G may be too little to provide sufficient ion conductivity, and the UV-curable adhesive may not be able to fully cure quickly in the dynamic roll-to-roll process due to the excessive content, and there is also the risk of glue overflow (or glue leakage). In a preferred embodiment, the content of lithium perchlorate is between 4wt% and 10wt% based on the total weight of the electrolyte mixture to better achieve the above effect.

In some embodiments, the UV-curable adhesive may include an acrylic resin (or an acrylic pressure-sensitive resin). For example, the acrylic (pressure-sensitive) resin may be polymethyl methacrylate, polyurethane acrylate, or epoxy acrylate. The above-mentioned acrylic resin UV-curable adhesive can be rapidly cured within a specific UV wavelength range, thereby facilitating the integration of the curing process into a roll-to-roll process, and avoiding damage to other layers in the electrochromic film 1000 (e.g., the color-changing reduction layer 120 and the color-changing oxidation layer 140) due to excessive energy provided for curing or excessive curing time, which will be described below. As previously described, the ion-conducting gel G may include an appropriate amount of a photoinitiator so that the ion-conducting gel G reacts rapidly and cures after being irradiated with UV light. Specifically, the optional photoinitiator disclosed in the present invention includes acylphosphine oxide materials (models: Irgacure® TPO, Irgacure® 819), and the content of the photoinitiator can be between 0.5wt% and 2.5wt% based on the total weight of the electrolyte mixture to achieve the best curing effect and avoid the photoinitiator residue from further decomposing other components in the cured solid electrolyte layer 150 and causing degradation of other components, thereby avoiding the rapid loss of ionic conductivity of the solid electrolyte layer 150 over time. Specifically, if the content of the photoinitiator is less than 0.5 wt %, the ion conductive gel G may not be completely cured; and if the content of the photoinitiator is greater than 2.5 wt %, the photoinitiator may remain in the solid electrolyte layer 150 due to incomplete consumption.

On the other hand, the viscosity of the ion conductive gel G is important for whether the solid electrolyte layer 150 can be stably disposed in the electrochromic film 1000 through a roll-to-roll process, and is also important for whether the electrolyte in the solid electrolyte layer 150 can be uniformly dispersed to achieve good ionic conductivity. Specifically, the viscosity of the ion conductive gel G can affect its fluidity, viscosity and the dispersion of the ion salt therein. If the viscosity of the ion conductive gel G is too high, the fluidity of the ion conductive gel G may be too low and the viscosity may be too high. The ion conductive gel G may easily accumulate at the nozzle of the spray coating machine M and may not easily spread on the supporting surface (e.g., the surface 141 of the color-changing oxide layer 140). The ion conductive gel G may not be evenly dispersed before the pressing step in the dynamic roll-to-roll process, resulting in the final solid electrolyte layer 1 being too thin. 50 cannot have a uniform thickness, thereby affecting the ionic conductivity of the solid electrolyte layer 150, and easily causing the lithium salt in the ion conductive colloid G to be unevenly dispersed, easily agglomerated or deposited; and if the viscosity of the ion conductive colloid G is too low, it may cause the fluidity of the ion conductive colloid G to be too high and the viscosity to be too low, which is not conducive to stably configuring it on the supporting surface (for example, the surface 141 of the color-changing oxide layer 140) in the dynamic roll-to-roll process, and it is not suitable as a colloid with a certain degree of adhesion. Based on the above, the present disclosure can control the viscosity of the ion conductive gel G within the range of 200 cps to 10000 cps within the processing temperature range of the roll-to-roll process (between 15° C. and 70° C.), so as to facilitate the overall coating of the ion conductive gel G in the roll-to-roll process. In a preferred embodiment, the viscosity of the ion conductive gel G can be further controlled within the processing range of 25° C. to 40° C., thereby better achieving the above effects and more stably maintaining the overall quality of the rolled electrochromic film 1000. It is to be noted that the viscosity of the ion conductive gel G is measured using a Brookfield viscometer (model: DV-E). In some embodiments, a thermostatic bath (not shown) may be used to contain the ion conductive gel G to be coated to ensure that the ion conductive gel G maintains a suitable viscosity during coating. In other words, the temperature of the thermostatic bath may be controlled between 15°C and 70°C, preferably between 25°C and 40°C.

In some embodiments, in step S40, the ion conductive colloid G can also be selectively formed on the surface 121 of the continuously supplied color-changing reduction layer 120 opposite to the first conductive film material 110 (see FIG. 3A ). In other words, the ion conductive colloid G can be selectively formed on the surface 121 of the continuously supplied color-changing reduction layer 120 or on the surface 141 of the continuously supplied color-changing oxidation layer 140 according to actual process conditions.

Next, please refer to FIG. 2 and FIG. 3E at the same time. In step S50, the first conductive film material 110 provided with the color-changing reduction layer 120 is pressed onto the ion-conducting colloid G which is continuously supplied and arranged on the surface 141 of the color-changing oxide layer 140, so that the color-changing reduction layer 120 is located between the first conductive film material 110 and the ion-conducting colloid G. Specifically, the first conductive film material 110 provided with the color-changing reduction layer 120 can be transported in the roll-to-roll process by the rotation of the second conveying wheel R2, so that the first conductive film material 110 provided with the color-changing reduction layer 120 is transported between the first pressing wheel P1 and the second pressing wheel P2, and at the same time, the second conductive film material 130 provided with the ion conductive gel G and the color-changing oxide layer 140 can be transported by the rotation of the first conveying wheel R1. The first pressing wheel P1 and the second pressing wheel P2 are configured to press the first conductive film material 110 provided with the color-changing reduction layer 120 onto the continuously supplied ion-conductive gel G, and the first pressing wheel P1 and the second pressing wheel P2 have opposite rotation directions (for example, the first pressing wheel P1 rotates clockwise, and the second pressing wheel P2 rotates counterclockwise).

In some embodiments, the distance d between the first pressing wheel P1 and the second pressing wheel P2 may be between 100 μm and 500 μm, that is, the distance d may be 85% to 105% of the overall thickness of the electrochromic film 1000 (or film-like laminate 100) expected to be obtained in the present disclosure, thereby providing good pressing strength. Specifically, if the distance d between the first pressing wheel P1 and the second pressing wheel P2 is less than 100 microns (i.e., less than 85% of the overall thickness of the electrochromic film 1000 or the film-like laminate 100), it may cause seepage, thereby affecting the configuration state of the ion-conducting gel G; and if the distance d between the first pressing wheel P1 and the second pressing wheel P2 is greater than 500 microns (i.e., greater than 105% of the overall thickness of the electrochromic film 1000 or the film-like laminate 100), it may cause the layers to fail to be tightly bonded, thereby affecting the structural stability of the electrochromic film 1000. In some embodiments, the speed ratio of the first pressing wheel P1 and the second pressing wheel P2 may be between 1.5:1.0 and 1.0:1.5 (e.g., 1:1), thereby controlling the tension of each layer so that the electrochromic film 1000 formed finally has good flatness. In some embodiments, the wheel temperature of the first pressing wheel P1 and the second pressing wheel P2 may be between 15°C and 70°C, and preferably between 25°C and 40°C, to ensure that the ion conductive gel G still has good leveling during the conveying process. In some embodiments, the first pressing wheel P1 and the second pressing wheel P2 may be driven by different and independently operated motors.

In some embodiments, since the ion conductive gel G has a climbing region SL between the color-changing oxide layer 140 and the first electrode region ES1 of the second conductive film material 130, there may be a gap Q between the color-changing reduction layer 120 and the ion conductive gel G located on the first electrode region ES1 of the second conductive film material 130 (see FIG. 3E for easy understanding), and the gap Q may serve as a buffer area for overflowing gel, that is, excess ion conductive gel G may flow into the gap Q, thereby facilitating the convenience of the roll-to-roll process.

Then, in step S60, the ion conductive gel G is cured to form a solid electrolyte layer 150. Specifically, after each layer (the first conductive film material 110, the color-changing reduction layer 120, the ion conductive gel G, the color-changing oxide layer 140, and the second conductive film material 130) is pressed by the first pressing wheel P1 and the second pressing wheel P2, each layer can pass through an ultraviolet light source U so that each layer is irradiated with ultraviolet light during the transport of the roll-to-roll process. In other words, ultraviolet light can be used to irradiate the ion conductive gel G sandwiched between the color-changing reduction layer 120 and the color-changing oxidation layer 140, so that the ion conductive gel G is cured to form a solid electrolyte layer 150, and the color-changing reduction layer 120 and the color-changing oxidation layer 140 are tightly and firmly bonded. As mentioned above, the present disclosure uses an acrylic resin that can be quickly cured within a specific ultraviolet light wavelength range as the ultraviolet light curing glue, and the specific ultraviolet light wavelength range can avoid damaging other layers in the electrochromic film 1000. Specifically, the wavelength of the ultraviolet light can be between 365 nanometers and 395 nanometers. Since this wavelength range is narrow, it can provide relatively concentrated energy, so that the ion conductive gel G can be thoroughly cured even if it needs to pass through the ultraviolet light source U quickly (for example, passing through the ultraviolet light source U at a conveying speed of 1 meter/minute to 20 meters/minute) during the roll-to-roll process. In some embodiments, the length of the ultraviolet light irradiation range (the length parallel to the conveying direction) can be between 1 meter and 3 meters, and the width (the width perpendicular to the conveying direction, the width) can be between 300 mm and 1600 mm, so as to ensure that all the ion conductive gel G is indeed irradiated by the ultraviolet light and cured to form a solid electrolyte layer 150.

After at least performing the above steps S10 to S60, the film-like laminate 100 may be rolled up to form a film-like laminate 100. In some embodiments, the rolled film-like laminate 100 may be further cut to form an electrochromic film 1000 of a desired size and shape according to actual application requirements. The cut film-like laminate 100 includes a first conductive film material 110, a color-changing reduction layer 120, a solid electrolyte layer 150, a color-changing oxide layer 140, and a second conductive film material 130. The color-changing oxide layer 140 is disposed on the second conductive film material 130, the solid electrolyte layer 150 is disposed on the color-changing oxide layer 140, the color-changing reduction layer 120 is disposed on the solid electrolyte layer 150, and the first conductive film material 110 is disposed on the color-changing reduction layer 120. In some embodiments, when the overflow of the glue is not obvious, there is still a gap Q between the color-changing reduction layer 120 and the ion-conductive gel G located on the first electrode region ES1 of the second conductive film material 130. In the film-like stack 100, the color-changing reduction layer 120 is configured to produce an oxidation-reduction reaction with the color-changing oxide layer 140 when the electrochromic film 1000 undergoes an electric field change. When ions in the color-changing reduction layer 120 move to the color-changing oxide layer 140, the color-changing reduction layer 120 changes color, and the color-changing oxide layer 140 undergoes an oxidation reaction due to accepting the ions in the color-changing reduction layer 120, and also produces a color change. For example, the color-changing oxide layer 140 contains tungsten oxide, and when the electric field of the electrochromic film 1000 is not changed, the color-changing oxide layer 140 is transparent. When the electric field of the electrochromic film 1000 is changed, the color-changing oxide layer 140 turns blue, so that the light transmittance of the electrochromic film 1000 changes.

It is worth noting that the film-like stack 100 disclosed herein and the electrochromic film 1000 formed subsequently do not need to be additionally provided with a frame glue (frame) on the outer side wall thereof to prevent the ion-conducting material in the solid electrolyte layer 150 from flowing out, and through the design of the above-mentioned roll-to-roll process, the color-changing reduction layer 120 and the color-changing oxidation layer 140 can be tightly bonded to each other, so there is no need to additionally provide a frame glue (frame) on the outer side wall of the film-like stack 100 and the electrochromic film 1000 formed subsequently to prevent the color-changing reduction layer 120 and the color-changing oxidation layer 140 from peeling off. In other words, the electrochromic film 1000 finally formed by the present disclosure does not have a frame glue disposed on at least one side of the first conductive film material 110, the color-changing reduction layer 120, the solid electrolyte layer 150, the color-changing oxide layer 140 and the second conductive film material 130 and in contact with at least that side, so the outer side wall of the electrochromic film 1000 is exposed to the external environment. In more detail, the frame material used in traditional electrochromic elements may generally include acrylic resin, epoxy resin or a combination thereof (e.g., frame material used in One Drop Filling (ODF) process, Seal frame (manufacturer: Sekisui Chemical, Mitsui Chemicals, Kyoritsu Kyoritsu and Nippon Kayaku), etc., while the electrochromic film 1000 disclosed herein does not have a frame including the above materials.

In some embodiments, the film-like laminate 100 may further include a hardening layer 160. The hardening layer 160 can protect the layers from being scratched or worn, thereby extending the service life of the electrochromic film 1000. In some embodiments, the material of the hardening layer 160 includes a resin mixture to ensure that the film-like laminate 100 is flexible and thin. In some embodiments, the stacking of the hardening layer 160 can also be integrated into the roll-to-roll process, thereby facilitating the improvement of process convenience and productivity.

Then, please refer to FIG. 3F to perform the cutting step. It should be understood that the structure of FIG. 3F is the structure of FIG. 3E that is inverted and cut. The cutting step includes removing the hardening layer 160, the first conductive film material 110, the color-changing reduction layer 120, and the solid electrolyte layer 150 of the second side S2 of the film-like stack 100, so that the first electrode region ES1 of the second conductive film material 130 of the second side S2 is exposed. In detail, the cutting step is performed corresponding to the range of the first electrode region ES1. In some embodiments, the cutting step can be performed by using cutting equipment (means) such as a _CO2 laser machine, a stamping molding machine, a dimming film electrode knife, etc. In some embodiments, the film-like stack 100 may be cut into a suitable size before being cut (before the cutting step), for example, the cutting step may be integrated into the roll-to-roll process, and the film-like stack 100 may be transported in the roll-to-roll process by the rotation of the transport wheel, so that the film-like stack 100 is continuously supplied to the cutter for cutting, thereby increasing the speed of the cutting step. After the first conductive film material 110, the color-changing reduction layer 120, the solid electrolyte layer 150, and the hardening layer 160 contacting the first conductive film material 110 corresponding to the first electrode region ES1 are removed, the first electrode region ES1 of the second conductive film material 130 may be exposed. In some embodiments, the cutting step cannot completely remove the solid electrolyte layer 150 corresponding to the first electrode region ES1. For example, the cutting step may only reduce the thickness H5 of the solid electrolyte layer 150, or remove the portion of the solid electrolyte layer 150 corresponding to the first electrode region ES1, and only expose a portion of the first electrode region ES1 of the second conductive film material 130. In this case, acetone or 75% ethanol can be used to completely remove the solid electrolyte layer 150, so that the first electrode region ES1 of the second conductive film material 130 is completely exposed. In other words, in the present disclosure, the solid electrolyte layer 150 formed by the ion conductive gel G can be simply removed by acetone or 75% ethanol, thereby improving the simplicity of the cleaning step.

It is worth mentioning that, since in the aforementioned step S20, the shielding layer 180 has been used to prevent the color-changing oxide layer 140 from being formed on the first electrode region ES1 of the second conductive film material 130, there is no need to additionally remove the color-changing oxide layer 140 in the cutting step, which not only greatly improves the convenience of the process, but also reduces the color-changing oxide layer 140 remaining in the first electrode region ES1, thereby reducing the possibility of electrical failure.

Please continue to refer to FIG. 3F. The cutting step further includes removing the second conductive film material 130, the color-changing oxide layer 140, the solid electrolyte layer 150 and the hardening layer 160 contacting the second conductive film material 130 on the first side S1 of the film-like stack 100, thereby exposing the color-changing reduction layer 120 on the first side S1. In detail, before the cutting step, the area where the electrode is to be set (electrode area A) can be reserved first, and the hardening layer 160, the second conductive film material 130, the color-changing oxide layer 140 and the solid electrolyte layer 150 located in the electrode area A are removed through the cutting step. The specific removal method is as described in the previous paragraph, and will not be repeated here. After the hardening layer 160, the second conductive film material 130, the color-changing oxide layer 140 and the solid electrolyte layer 150 in the electrode region A located at the first side S1 are removed, the color-changing reduction layer 120 located in the electrode region A can be exposed. Similarly, if the cutting step cannot completely remove the solid electrolyte layer 150 located in the electrode region A, acetone or 75% ethanol can be used to completely remove the solid electrolyte layer 150 so that the color-changing reduction layer 120 located in the electrode region A is completely exposed.

Next, please refer to FIG. 3G, and a cleaning step is performed, including using a solution to clean the exposed color-changing reduction layer 120. In detail, when the material of the color-changing reduction layer 120 includes tungsten oxide, the solution used may include sodium hydroxide, hydrogen peroxide and water. In more detail, sodium hydroxide can react with tungsten oxide to cause tungsten oxide to fall off the surface 118 of the indium tin oxide conductive film 117 of the first conductive film material 110, while hydrogen peroxide can maintain a stable etching (cleaning) rate, and water can appropriately adjust the concentration of sodium oxide and hydrogen peroxide, and help to take away the residues after the reaction is completed. In some embodiments, in the solution, the content of sodium hydroxide is between 15 parts by weight and 40 parts by weight (preferably between 25 parts by weight and 35 parts by weight), and the content of hydrogen peroxide is between 2 parts by weight and 10 parts by weight (preferably between 4 parts by weight and 8 parts by weight) to achieve excellent cleaning effect. In detail, if the content (ratio) of sodium hydroxide is too high and the content (ratio) of hydrogen peroxide is too low, sodium hydroxide may remain on the surface 118 of the indium tin oxide conductive film 117, resulting in an increase in the cleaning time, and the etching rate may be reduced due to the complete consumption of hydrogen peroxide during the reaction period; if the content of sodium hydroxide is too low and the content of hydrogen peroxide is too high, the tungsten oxide may not react completely and cannot be completely removed, and the sodium hydroxide may be continuously consumed during the reaction period, resulting in excess hydrogen peroxide, which in turn causes the acid-base value (pH value) of the solution to be affected (decreased), affecting the cleaning effect. In other words, through the synergistic effect of sodium hydroxide, hydrogen peroxide and water, the material of the color-changing reduction layer 120 can be completely removed in a short time, so that the first conductive film material 110 located under the removed color-changing reduction layer 120 is exposed.

In some embodiments, before or during the use of the solution for cleaning, the pH value of the solution may be adjusted (maintained) to between 8.0 and 10.0, so that sodium hydroxide, hydrogen peroxide, and water can stably cooperate with each other during etching to maintain the reactivity and reaction rate of the solution. In some embodiments, after the use of the solution for cleaning, the surface 111 of the first conductive film 110 may be cleaned with 75% ethanol to ensure that all residues are completely removed from the surface 111 of the first conductive film 110. In some embodiments, the cleaning step may be performed by wiping, for example, using the solution to wipe back and forth multiple times (e.g., 5 to 20 times) on the surface 121 of the color-changing reduction layer 120 located in the electrode region A to achieve an excellent cleaning effect. It can be seen that the solution used in the present disclosure can quickly and easily remove the color-changing reduction layer 120. The present disclosure can confirm that the resistance of the first conductive film 110 is less than 500Ω by using a four-point probe to confirm that the color-changing reduction layer 120 located in the electrode region A is completely removed.

It is worth noting that in the present disclosure, before forming the color-changing reduction layer 120 on the first conductive film 110, the second electrode region and the second non-electrode region may be planned on the first conductive film 110. Similarly, the second electrode region is a region for subsequently setting an electrode (e.g., a positive electrode or a negative electrode), and the first non-electrode region is a region for subsequently setting a layer other than the electrode. In some embodiments, after planning the second electrode region and the second non-electrode region, a shielding layer may be formed on the second electrode region to completely cover the second electrode region. In detail, the shielding layer may be a peelable adhesive formed by screen printing, spraying or transfer, and the peelable adhesive material may include UV-curable low-viscosity silicone, polyurethane resin or a combination thereof, so as to facilitate easy removal thereof later. Specifically, the configuration of the second electrode region ES2 and the second non-electrode region NS2 may refer to the configuration of the first electrode region ES1 and the first non-electrode region NS1 shown in Figures 4A to 4C, which will not be described in detail here, but is not limited to this. In this embodiment, since the second electrode region ES2 of the first conductive film material 110 is covered by the shielding layer, the color-changing reduction layer 120 can be formed on the second non-electrode region NS2 of the first conductive film material 110 and on the shielding layer. On the other hand, after the color-changing reduction layer 120 is formed, the shielding layer can be removed, and in some embodiments, the color-changing reduction layer 120 disposed on the shielding layer can be removed together, so that the first conductive film material 110 originally located under the shielding layer can be exposed. The remaining details are the same as the aforementioned steps S20 and S30, and will not be repeated here.

If the second electrode region ES2 and the second non-electrode region NS2 are planned in advance on the first conductive film material 110, and the color-changing reduction layer 120 is prevented from being formed on the second electrode region ES2 of the first conductive film material 110, then in the cutting step, for the first side S1 of the film-like stack 100, the color-changing reduction layer 120 can be omitted from being removed, that is, after the hardening layer 160, the second conductive film material 130 and the solid electrolyte layer 150 of the first side S1 are removed, the second electrode region ES2 of the first conductive film material 110 can be exposed. In this way, there is no need to additionally remove the color-changing reduction layer 120, which not only greatly improves the convenience of the process, but also reduces the color-changing reduction layer 120 remaining in the second electrode region ES2, thereby reducing the possibility of electrical failure. In addition, the ion conductive gel G can also form a climbing region (such as the climbing region SL shown in FIG. 3D ) between the color-changing reduction layer 120 and the second electrode region ES2 of the first conductive film material 110, so there can also be a gap (such as the gap Q shown in FIG. 3E ) between the color-changing oxide layer 140 and the ion conductive gel G located on the second electrode region ES2 of the first conductive film material 110 as a buffer region for overflowing gel. For more details, please refer to the description of the first electrode region ES1 and the first non-electrode region NS1 in the previous text, which will not be repeated here.

It is to be noted that in a preferred embodiment, the first electrode region ES1 may be pre-planned on the second conductive film material 130, but the second electrode region ES2 may not be pre-planned on the first conductive film material 110; or the second electrode region ES2 may be pre-planned on the first conductive film material 110, but the first electrode region ES1 may not be pre-planned on the second conductive film material 130. In this way, the pre-alignment between the first electrode region ES1 and the second electrode region ES2 may be omitted, further improving the process convenience. In a more preferred implementation, the first electrode region ES1 may be pre-planned on the second conductive film material 130, rather than the second electrode region ES2 on the first conductive film material 110. This not only improves process convenience, but also omits the step of cleaning the discoloration oxide layer 140, which is more difficult to remove than the discoloration reduction layer 120, thereby avoiding electrical problems caused by incomplete cleaning.

Then, referring to FIG. 3H , a coating step is performed, which may include forming a first electrode E1 on the surface 111 (second electrode region ES2) of the exposed first conductive film material 110, and forming a second electrode E2 on the surface 131 (first electrode region ES1) of the exposed second conductive film material 130. Specifically, the first electrode E1 and the second electrode E2 may be the positive electrode and the negative electrode of the electrochromic film 1000, respectively, and the first electrode E1 and the second electrode E2 may be, for example, conductive silver gel, flexible printed circuit (FPC) or conductive copper foil. The first electrode E1 formed by coating may be adjacent to the color-changing reduction layer 120, and have a gap SP between the color-changing reduction layer 120; the second electrode E2 formed by coating may be adjacent to the color-changing oxide layer 140, and have a gap SP between the color-changing oxide layer 140. In some embodiments, the thickness H6 of the first electrode E1 may be increased by coating multiple times, so that the first electrode E1 is further adjacent to the side walls of the solid electrolyte layer 150 and the color-changing oxide layer 140, and the thickness H7 of the second electrode E2 may be increased by coating multiple times, so that the second electrode E2 is further adjacent to the side walls of the solid electrolyte layer 150 and the color-changing reduction layer 120. This ensures that the first electrode E1 and the second electrode E2 have high material density, thereby reducing the probability of electrical failure. In some embodiments, the top surface E1T of the first electrode E1 can be lower than the surface 131 of the second conductive film material 130, and the top surface E2T of the second electrode E2 can be lower than the surface 111 of the first conductive film material 110 to ensure that there is no electrical connection between the first electrode E1 and the second electrode E2.

Next, please continue to refer to FIG. 3H , the manufacturing method of the electrochromic film 1000 may further include forming an edge sealing structure 170 in the gap SP. In more detail, the edge sealing structure 170 corresponding to the first electrode region ES1 can fill the gap SP and extend to the side walls of the color-changing reduction layer 120, the solid electrolyte layer 150, the color-changing oxide layer 140, the second conductive film material 130 and the hardening layer 160 to reduce the probability of environmental factors such as moisture and dust invading the electrochromic film 1000; similarly, the edge sealing structure 170 corresponding to the second electrode region ES2 can fill the gap SP and extend to the side walls of the color-changing oxide layer 140, the solid electrolyte layer 150, the color-changing reduction layer 120, the first conductive film material 110 and the hardening layer 160 to reduce the probability of environmental factors such as moisture and dust invading the electrochromic film 1000. In some embodiments, the edge sealing structure 170 may further extend to, cover and contact the top surface E1T of the first electrode E1 and the top surface E2T of the second electrode E2, and not protrude from the outer side walls of the first electrode E1 and the second electrode E2, so as to enhance the structural stability of the edge sealing structure 170. In some embodiments, the edge sealing structure 170 may have a curved side wall C to withstand bending stress. In some embodiments, the material of the edge sealing structure 170 may include acrylic resin, epoxy resin or a combination thereof to have good barrier properties. In some embodiments, the edge sealing structure 170 can be formed by coating, and the slurry used can be irradiated with ultraviolet light with a wavelength of 365nm to 395nm, and the required time is 30 seconds to 60 seconds to cure, so that other layers in the electrochromic film 1000 will not be damaged, and the process is convenient. It is hoped that the edge sealing structure 170 disclosed in the present invention is not to prevent the electrolyte from flowing out. More specifically, since the electrolyte used in the present invention is a solid electrolyte, even if the edge sealing structure 170 is not provided, there will be no leakage or outflow of the electrolyte.

According to the above-mentioned implementation method of the present disclosure, the present disclosure not only improves the traditional plate-shaped electrochromic element with a hard material such as a glass substrate as a base layer to form an electrochromic film, but also integrates the manufacturing process of the electrochromic film into a roll-to-roll process through specific process improvements. In this way, a rolled and film-shaped electrochromic film can be obtained instead of the traditional plate-shaped (sheet) electrochromic element with a hard material such as a glass substrate as a base layer. Therefore, the electrochromic film can be directly cut into a suitable shape and size according to the design of the back end, so that the entire electrochromic film manufacturing method will not be limited by the final shape, size and curvature of the electrochromic film when it is used. On the other hand, the formation of electrochromic film through roll-to-roll process can not only improve production efficiency and yield, avoid exhaust gas or waste liquid discharge, and improve storage and transportation convenience, but also can be produced in a smaller production base compared to the traditional glass process, greatly improving the convenience of the process and not limiting the production capacity. In addition, since the electrode area and non-electrode area are planned in advance in the conductive film material, it can be ensured that the color-changing oxidation/reduction layer is only formed in the non-electrode area, so there is no need to remove the excess color-changing oxidation/reduction layer, which greatly improves the convenience of the process and ensures that the electrode is stably formed in the electrochromic film. In addition, the electrochromic film prepared by the manufacturing method disclosed herein can omit the configuration of a frame glue (frame), that is, there is no need to introduce additional frame glue to prevent the electrolyte in the electrochromic film from leaking out, thereby greatly improving the applicability and installation convenience of the electrochromic film, so that the electrochromic film can be applied to a variety of fields.

Although the present disclosure has been disclosed in the above implementation form, it is not intended to limit the present disclosure. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be determined by the scope of the attached patent application.

1000: electrochromic film 100: film-like laminate 110: first conductive film 111: surface 115: substrate 116: surface 117: indium tin oxide conductive film 118: surface 120: color-changing reduction layer 121: surface 130: second conductive film 131: surface 135: substrate 136: surface 137: indium tin oxide conductive film 138: surface 140: color-changing oxide layer 141: surface 150: solid electrolyte layer 160: hardening layer 170: edge sealing structure 180: shielding layer G: ion conductive colloid M: spray coating machine P1: First pressing wheel P2: Second pressing wheel R1: First conveyor wheel R2: Second conveyor wheel H1, H2, H3, H4, H5, H6, H7: Thickness d: Spacing SL: Climbing area Q: Gap S1: First side S2: Second side ES1: First electrode area ES2: Second electrode area NS1: First non-electrode area NS2: Second non-electrode area A: Electrode area E1: First electrode E2: Second electrode E1T, E2T: Top surface SP: Gap U: UV light source C: Curved side wall S10~S60: Steps

In order to make the above and other purposes, features, advantages and embodiments of the present disclosure more clearly understandable, the attached drawings are described as follows: FIG. 1 is a flow chart of a method for manufacturing an electrochromic film according to some embodiments of the present disclosure; FIG. 2 is a schematic diagram of a film-like stacking process according to some embodiments of the present disclosure; FIG. 3A to FIG. 3H are schematic cross-sectional views of different steps of a method for manufacturing an electrochromic film according to some embodiments of the present disclosure; and FIG. 4A to FIG. 4C are schematic top views of the planning of a first electrode region (second electrode region) and a first non-electrode region (second non-electrode region) of a rolled second conductive film material (first conductive film material) according to some embodiments of the present disclosure.

Domestic storage information (please note in the order of storage institution, date, and number) None Foreign storage information (please note in the order of storage country, institution, date, and number) None

S10~S60: Steps

Claims (10)

A method for manufacturing an electrochromic film, comprising: forming a color-changing reduction layer on a first conductive film material; receiving a second conductive film material, the second conductive film material comprising a first electrode region and a first non-electrode region; forming a color-changing oxide layer on the first non-electrode region of the second conductive film material; continuously supplying the second conductive film material provided with the color-changing oxide layer, and forming an ion-conducting colloid on the color-changing oxide layer; pressing the first conductive film material provided with the color-changing reduction layer onto the continuously supplied ion-conducting colloid, so that the color-changing reduction layer is located between the first conductive film material and the ion-conducting colloid; and The ion-conducting colloid is cured to form a solid electrolyte layer. The method for manufacturing the electrochromic film as described in claim 1 further comprises: Before forming the color-changing oxide layer, forming a shielding layer on the first electrode region of the second conductive film material. The method for manufacturing the electrochromic film as described in claim 2 further comprises: After forming the color-changing oxide layer, removing the shielding layer. The method for manufacturing the electrochromic film as described in claim 1 further comprises: Forming the ion conductive colloid on the first electrode region of the second conductive film material. In the method for manufacturing an electrochromic film as described in claim 1, the first conductive film material includes a second electrode region and a second non-electrode region, and the color-changing reduction layer is formed on the second non-electrode region of the first conductive film material. The method for manufacturing the electrochromic film as described in claim 5 further comprises: Before forming the color-changing reduction layer, forming a shielding layer on the second electrode region of the first conductive film material. The method for manufacturing the electrochromic film as described in claim 6 further comprises: After forming the color-changing reduction layer, removing the shielding layer. The method for manufacturing the electrochromic film as described in claim 1 further comprises: Performing a coating step to form an electrode in the first electrode region of the second conductive film material, wherein there is a gap between the electrode and the solid electrolyte layer. The method for manufacturing the electrochromic film as described in claim 8 further comprises: Forming a sealing structure in the gap, wherein the material of the sealing structure comprises acrylic resin, epoxy resin or a combination thereof. A method for manufacturing an electrochromic film as described in claim 8, wherein the edge sealing structure covers a top surface of the electrode.

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