Super capacitor capable of realizing in-plane series connection and integration of high-voltage structure and preparation method of super capacitor

Abstract

The invention provides a super capacitor capable of realizing in-plane series integration of a high-voltage structure and a preparation method thereof, and the method comprises the steps: employing an insulated continuous fiber fabric as a substrate, employing a suction filtration printing technology, and constructing a patterned electrode composed of a high-conductive active layer on the surface of the fabric in situ. Furthermore, rigid insulating resin walls penetrating through the thickness of the fabric are constructed between the energy storage units, so that physical cutoff of ion transmission channels between the adjacent units is realized; in cooperation with integrated packaging of an electronic interconnection path crossing an insulating wall and a bicontinuous phase structure electrolyte, high-voltage series integration of a plurality of energy storage units is realized in a single pair of electrode composite material laminated boards. The structural energy storage module not only retains the excellent bearing capacity of the composite material, but also breaks through the limitation of low voltage of a traditional device monomer, realizes the direct driving of the electronic device by the structural member, and has the characteristics of low cost, high design freedom and easiness in large-scale manufacturing.

Description

Technical Field

[0001] This invention relates to the field of capacitor manufacturing technology, specifically to a high-voltage supercapacitor with an in-plane series integrated structure and its manufacturing method. Background Technology

[0002] With the increasing demand for long-range and lightweight advanced transportation equipment (such as new energy vehicles, drones, and aerospace vehicles), the traditional "structure and energy separation" design model (i.e., independent battery packs increase the parasitic weight of the system) has reached its bottleneck. Structural power composites, capable of simultaneously bearing mechanical loads and storing electrical energy, are a core technology for achieving extreme lightweighting of next-generation equipment. Among them, glass fiber reinforced resin matrix composites possess inherent insulation, low cost, and excellent mechanical properties. Compared to conductive carbon fiber substrates, they exhibit unique advantages as an insulating substrate in constructing multifunctional integrated energy storage units, and are gradually becoming a research hotspot in the field of structural energy storage.

[0003] However, unlike traditional electrode materials with abundant active sites on their surfaces, constructing efficient conductive energy storage networks on the surface of inert insulating fibers presents significant challenges. On the one hand, loading high-specific-surface-area active materials such as carbon nanotubes using traditional mixed adhesives is prone to active layer detachment or agglomeration during subsequent molding or resin flow due to weak interfacial bonding, severely increasing the device's internal resistance and causing mechanical delamination. On the other hand, current structural energy storage devices are mostly limited to "single-unit" research, with low output voltages (typically only 0~2.5V), making them unable to directly drive electronic devices. Using traditional external wiring for series connection not only compromises the structural integrity but also increases system complexity and weight. If a carbon fiber substrate is used for internal integration, the conductivity of carbon fibers necessitates physical cutting of the fibers for insulation, which would cause a catastrophic decline in mechanical properties, deviating from the original purpose of structural energy storage.

[0004] Therefore, in the face of the application requirements of structure-function integration, how to solve the problem of interface stability load of active materials in a single-layer composite material that maintains mechanical continuity, and achieve modular series integration of high voltage, is a key problem that urgently needs to be solved. The field still needs to propose more advanced and efficient high-voltage structure supercapacitors based on vacuum printing that can be integrated in plane series and their preparation methods.

[0005] Patent application CN115172071A discloses a self-integrated flexible supercapacitor based on fabric and its fabrication method. The supercapacitor comprises a fabric-based gel polymer composite material and nano-carbon material electrodes screen-printed on both sides of the composite material, with the electrodes arranged alternately at corresponding positions on both sides of the composite material. The fabrication method involves impregnating a fabric substrate with polyvinyl alcohol. In a potassium hydroxide gel electrolyte, excess electrolyte is pressed out of the fabric substrate by rollers and dried. This process is repeated several times to obtain a fabric-based gel polymer composite material. Nano-carbon material electrodes are screen-printed on both sides of the composite material, and after curing, polyvinyl alcohol is coated onto the corresponding areas of the electrodes. A self-integrated flexible supercapacitor was obtained using potassium hydroxide gel electrolyte. However, this patent cannot completely solve the existing technical problems, nor can it meet the needs of this invention. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a high-voltage supercapacitor with an in-plane series integrated structure and its fabrication method.

[0007] The method for fabricating a high-voltage supercapacitor with an in-plane series integration structure according to the present invention includes:

[0008] Step S1: Based on the electrical insulation properties of the continuous insulating fiber fabric, plan the circuit topology on the fabric surface to define multiple discrete energy storage unit regions and insulating isolation regions located between the unit regions; prepare an anti-permeability mask according to the plan and cover the insulating isolation regions and the edge of the fabric. Step S2: Vacuum filtration is performed on the insulating continuous fiber fabric as a filter membrane. A filtration printing process is performed on the energy storage unit area without a mask. A dispersion of carbon-containing material is added to the energy storage unit area and deposited by filtration. An active functional layer with a preset pattern is formed on the surface of the fabric to obtain a conductive fiber preform. Step S3: Infiltrate structural resin into the exposed fiber area corresponding to the insulation isolation area and pre-cur it to construct a rigid insulation wall that runs through the thickness direction of the fabric, thereby realizing the physical connection between adjacent energy storage unit areas and the complete blockage of ion transport channels. Step S4: Between adjacent energy storage unit areas, an electronic conduction path is constructed across the rigid insulating wall to electrically connect the negative electrode region of the previous energy storage unit with the positive electrode region of the next energy storage unit, forming an in-plane series integrated energy storage unit. Step S5: Place the integrated energy storage unit component processed in step S4 into a mold or vacuum bag, inject the structural electrolyte precursor, and perform in-situ curing and molding under controlled pressure.

[0009] Preferably, the insulating continuous fiber fabric in step S1 is a glass fiber, aramid fiber, basalt fiber, hemp fiber, or wood fiber fabric; the dispersion in step S2 is an organic dispersion in which a high specific surface area carbon material is dispersed in N-methylpyrrolidone, and the high specific surface area carbon material is a carbon nanotube, carbon nanofiber, or graphene.

[0010] Preferably, in step S2, the loading of the active functional layer is gradient-controlled by the filtration volume, ranging from 1 to 10 mg / cm².

[0011] Preferably, in step S3, the width of the rigid insulating wall is designed to be greater than the gap between two adjacent energy storage unit areas, and there is partial overlap between the edge of the insulating isolation area and the active functional layer, forming a seepage-proof buffer zone.

[0012] Preferably, in step S4, the electronic conduction path is implemented using conductive silver paste, metal tabs, or a deposited metal layer; the electronic conduction path is located on the surface or between layers of the rigid insulating wall and is encapsulated and protected by a subsequently cured structural resin.

[0013] Preferably, the structural electrolyte precursor in step S5 is a dual continuous phase system, comprising a thermosetting resin phase that provides mechanical strength and an ionic liquid / lithium salt phase that provides ion transport capability; during the curing process, the rigid insulating wall pre-cured in step S3 is used as a fluid boundary to restrict the liquid electrolyte to wetting and curing only within its own independent energy storage unit area.

[0014] Preferably, the energy storage unit area is configured as a symmetrical supercapacitor unit or an asymmetrical lithium-ion capacitor unit; when configured as an asymmetrical lithium-ion capacitor unit, carbon nanotubes are printed by vacuum filtration in the positive electrode area, and pre-embedded lithium carbon material or lithium titanate material is printed by vacuum filtration in the negative electrode area.

[0015] The in-plane series-integrated high-voltage structure supercapacitor provided by the present invention includes: an insulating fiber fabric substrate, a carbon material active coating, a rigid insulating wall, a structural electrolyte, an electronic pathway wire, a positive electrode, and a negative electrode; Multiple discrete carbon material active coatings are disposed on the insulating fiber fabric substrate, and the carbon material active coatings constitute the energy storage unit area; The rigid insulating wall is made of structural resin and extends through the insulating fiber fabric substrate. The rigid insulating wall is located in the insulating isolation area between the energy storage unit areas, physically separating adjacent energy storage unit areas. The structural electrolyte is filled and solidified in each of the energy storage unit areas, and the structural electrolyte wets and coats the active coating of the carbon material. The electronic pathway conductor crosses the rigid insulating wall and is electrically connected to the current collection area of ​​the adjacent energy storage unit area; The positive and negative electrodes are connected to the end of the active coating of the carbon material in the outermost energy storage unit area.

[0016] Preferably, the capacitor is a single-layer or multi-layer composite plate structure; the capacitor contains multiple independent energy storage units that are physically connected through the insulating fiber fabric substrate and ion-isolated by the rigid insulating wall; the multiple independent energy storage units are internally connected in series through the electronic pathway wires.

[0017] Preferably, the capacitor is a laminate-shaped load-bearing component, and the electronic pathway wires are encapsulated inside the laminate by cured structural resin; the positive and negative electrodes are led out from the edge of the laminate as tabs.

[0018] Compared with the prior art, the present invention has the following beneficial effects: (1) This invention makes full use of the intrinsic insulation properties and mechanical continuity of insulating fiber fabrics. By constructing an in-situ rigid insulating barrier dam, it realizes the in-plane series integration of multiple energy storage units inside a single pair of electrode composite materials without physically cutting the fiber substrate. This not only breaks through the application bottleneck of low voltage (usually <2.5V) of traditional structure battery cells and realizes direct output of high voltage (5V or higher), but also preserves the tensile and shear strength of composite materials as load-bearing components to the maximum extent. (2) The filtration printing process adopted in this invention makes full use of the strong van der Waals forces and π-π conjugation of high specific surface area carbon materials (such as carbon nanotubes and graphene) in the organic dispersion system, realizing the in-situ self-assembly and dense stacking of active materials on the surface of insulating fiber fabric. While giving the insulating fabric excellent conductivity and energy storage properties, this method constructs a continuous and dense electron transport network, effectively leveraging the high specific surface area advantage of carbon nanomaterials, and significantly improving the utilization rate of active materials and electrochemical performance of structural energy storage devices. (3) This invention relies on mask-assisted “sampling printing” and “partitioned glue injection” technology to introduce the “patterning” and “modularization” thinking in semiconductor manufacturing into the molding of energy storage and load-bearing integrated composite materials. It has extremely high designability and manufacturing flexibility. This method does not require expensive and complex equipment. The circuit topology can be customized (such as arbitrary series and parallel combinations) through simple mask and flow channel design. It is a low-cost, high-efficiency and easy-to-scale general method for preparing high-performance structure-function integrated components. Attached Figure Description

[0019] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the high-voltage supercapacitor structure that can be integrated in-plane via series based on vacuum printing according to the present invention. Figure 2The present invention provides the charge and discharge curves of a supercapacitor with an in-plane series-integrated high-voltage structure based on vacuum filtration printing. Detailed Implementation

[0020] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0021] Example 1 A schematic diagram of the high-voltage supercapacitor structure that can be integrated in-plane via series based on vacuum printing is shown below. Figure 1 As shown, it includes: a drip nozzle 1 for dispersing a carbon-containing material dispersion, an insulating fiber fabric 2, an active coating of carbon material 3, a mask 4, a structural resin 5, a structural electrolyte 6, an electronic pathway wire 7, a positive electrode 8, and a negative electrode 9.

[0022] The positional and connection relationships of the components are as follows: Component construction phase: The anti-permeability mask 4 tightly covers the surface of the insulating fiber fabric 2, and its covered area defines the insulation isolation area and the edge encapsulation area, while the uncovered area defines the energy storage unit area. The drip nozzle 1 of the carbon material dispersion is located above the fabric and is used to directionally drip the dispersion onto the area not covered by the mask; under the action of vacuum-assisted filtration, the dispersion penetrates into the interior and surface of the fabric, forming a carbon material active coating 3 with a specific pattern (such as square, interdigitated, or S-shaped).

[0023] Component encapsulation and connection stage: Insulating fiber fabric 2 serves as the overall mechanical base, supporting all functional components. Structural resin 5 permeates and cures in the central isolation area and the two side edge areas of the fabric. The structural resin in the center forms a rigid insulating wall that runs through the thickness of the fabric, physically dividing the fabric into multiple independent energy storage chambers on the left and right sides.

[0024] The structural electrolyte 6 fills the multiple independent energy storage chambers, completely impregnating and encapsulating the carbon material active coating 3 to form an ion-conducting environment. The electronic pathway wire 7 crosses the central structural resin 5 (insulating wall), physically connecting the current collectors of the left and right energy storage units, thus establishing an in-plane series circuit. The negative electrode 9 and positive electrode 8 are respectively connected to the leftmost and rightmost ends of the carbon material active coating, serving as the external power output ports for the entire module.

[0025] Overall working principle: This supercapacitor operates through an "in-plane series integration" mechanism. The insulating fiber fabric 2 provides continuous mechanical support, ensuring that the components do not break under stress. The structural resin 5 provides structural rigidity and plays a crucial "ion barrier" role, preventing ion short circuits caused by seepage of the structural electrolyte 6 between energy storage units.

[0026] During charging and discharging, current flows in from the positive electrode 8, passes through the right-side energy storage unit, is transmitted to the left-side energy storage unit via the electron path wire 7, and finally flows out from the negative electrode 9 (or vice versa). Because the structural resin 5 blocks the ion pathway, electrons must be forced to flow through multiple units via the electron path wire 7, thus multiplying the voltage (for example, if the voltage of a single cell is 2.5V, the output voltage through this series structure can reach over 5V, and the number of energy storage cells is not limited to two). The carbon material active coating 3 utilizes its high specific surface area to adsorb electrolyte ions, achieving double-layer energy storage.

[0027] The preparation method includes the following steps: Step S1: Based on the electrical insulation characteristics of the continuous insulating fiber fabric, and according to the target voltage and current output requirements, plan the circuit topology on the fabric surface, defining several discrete "energy storage unit areas" and "insulation isolation areas" located between the unit areas; prepare an anti-permeability mask according to the plan, and cover the insulation isolation areas and the edge of the fabric. Step S2: The insulating fiber fabric is placed in the vacuum filtration flask as a filter membrane for vacuum filtration. The energy storage unit area without the mask is subjected to a step-by-step filtration printing process. The carbon material dispersion is dripped into the nozzle and deposited by vacuum filtration to form an active functional layer. After removing the mask, a conductive fiber preform with a specific discrete pattern on a single layer of fabric is obtained. Step S3: For the insulation isolation area planned in Step S1, pure structural resin is infiltrated into the exposed fiber area and pre-cured to construct a rigid insulation wall that runs through the thickness of the fabric, so as to realize the physical connection between adjacent energy storage unit areas but completely block the ion transport channel. Step S4: Between adjacent energy storage unit areas, an electronic conduction path is constructed across the rigid insulating wall to electrically connect the negative electrode region of the previous energy storage unit with the positive electrode region of the next energy storage unit, forming an in-plane series integrated energy storage unit. Step S5: Place the integrated energy storage unit component obtained in step S4 into a mold or vacuum bag, inject the structural electrolyte precursor, and perform in-situ curing and molding under controlled pressure. A structural supercapacitor component that can output high voltage with a single pair of electrodes.

[0028] The insulating fiber fabric in step S1 includes, but is not limited to, glass fiber, aramid fiber, basalt fiber, hemp fiber, and wood fiber.

[0029] The filtration printing process in step S2 aims to endow the insulating fiber fabric with energy storage and conductivity; the dispersion is an organic dispersion in which high specific surface area carbon materials are dispersed in N-methylpyrrolidone, and a dense conductive network is formed on the insulating fiber fabric by self-assembly using van der Waals forces and π-π conjugation between carbon materials. The high specific surface area carbon materials include, but are not limited to, carbon nanotubes, carbon nanofibers and graphene.

[0030] The rigid insulating wall in step S3 has a designed width greater than the gap between two adjacent energy storage unit areas, and partially overlaps with the active functional layer at the edge of the insulating isolation area to form an anti-seepage buffer zone, so as to prevent ion short circuits caused by cross-regional seepage of the structural electrolyte during the pressurization process in step S5.

[0031] The structural electrolyte precursor in step S5 is a dual continuous phase system, including a thermosetting resin phase that provides mechanical strength and an ionic liquid / lithium salt phase that provides ion transport capability. During the curing process, the rigid insulating wall pre-cured in step S3 is used as a fluid boundary to restrict the liquid electrolyte to wetting and curing only in its own independent energy storage unit area.

[0032] This method supports the co-layer hybrid integration of different types of energy storage devices; the energy storage unit area can be configured as a symmetrical supercapacitor unit, in which carbon nanotubes are filtered in both the positive and negative electrode regions; or it can be configured as an asymmetrical lithium-ion capacitor unit, in which carbon nanotubes are filtered in the positive electrode region and pre-embedded lithium carbon material or lithium titanate material is filtered in the negative electrode region, and the hybrid circuit connection is achieved through step S4.

[0033] In step S2, the loading of the active functional layer is gradient-controlled by the filtration volume, within a range of 1 mg / cm³. 2 Up to 10 mg / cm 2 .

[0034] The electronic conduction path in step S4 is achieved using conductive silver paste, metal tabs, or deposited metal layers; the electronic conduction path is located on the surface or between layers of the rigid insulating wall and is encapsulated and protected by cured structural resin.

[0035] The capacitor is a single-layer or multi-layer composite plate structure, which contains several independent energy storage units that are physically connected by an insulating fiber substrate but ion-isolated by a rigid insulating wall. The energy storage units are connected in series inside the composite material through embedded circuits, and can output a multiplied high voltage at the composite material tabs without external wiring.

[0036] This capacitor is used as a load-bearing component in the structure of drone fuselage, automobile exterior panels or wind turbine blades, and at the same time as a distributed power source to directly drive electronic loads integrated on the surface of the structure.

[0037] Example 2 This embodiment provides a high-voltage structured supercapacitor based on vacuum filtration printing that can be integrated in-plane series, comprising: a drop nozzle containing a carbon nanotube dispersion, a glass fiber fabric, an anti-permeability mask, a structural epoxy resin, a structural electrolyte (LiTFSI electrolyte + bisphenol A ethoxylate diacrylate), and copper foil wires.

[0038] The preparation method includes the following steps: Step T1: Set up 4 (2×2 array) square energy storage unit areas of 2.5*2.5cm on a glass fiber plain weave fabric with a diameter of 10cm, with each energy storage unit spaced 2cm apart; prepare an anti-permeability mask according to the plan and cover the insulating isolation area and the edge of the fabric; Step T2: The insulating glass fiber fabric is placed in the vacuum filtration flask as a filter membrane for vacuum filtration. The energy storage unit area without a mask is subjected to a step-by-step filtration printing process. The 2 mg / ml carbon nanotube dispersion is dripped into the nozzle and filtered and deposited to form an active functional layer. Step T3: For the insulation isolation area planned in Step T1, pure structural resin is infiltrated into the exposed fiber area and pre-cured to construct a rigid insulation wall that runs through the thickness of the fabric, so as to realize the physical connection between adjacent energy storage unit areas but completely block the ion transport channel. Step T4: Between adjacent energy storage unit areas, an electronic conduction path is constructed by using copper foil wires to cross the rigid insulating wall, electrically connecting the negative electrode area of ​​the previous energy storage unit with the positive electrode area of ​​the next energy storage unit to form an in-plane series integrated energy storage unit assembly. Step T5: The integrated energy storage unit component obtained in step T4 is placed in a vacuum bag in the stacking order of integrated energy storage unit component-insulating glass fiber fabric-integrated energy storage unit component, and a structural electrolyte precursor is injected. The component is then cured in situ at 90°C under atmospheric pressure of 0.1 MPa to form a structural supercapacitor component that can output high voltage with a single pair of electrodes.

[0039] The obtained capacitor has a tensile modulus of 32.7 GPa, a tensile strength of 401.6 MPa, and an energy density of 33 Wh / m³. 2 This 2×2 array module successfully achieved stable series connection of four units, with a maximum voltage of 10V. It can be customized to meet different voltage requirements (such as 12V, 24V) and different geometric shapes, and is scalable. Figure 2 The above shows the charge and discharge curves of the in-plane series integrated high-voltage supercapacitor based on vacuum printing according to the present invention.

[0040] Those skilled in the art will understand that, in addition to implementing the system, apparatus, and their modules provided by this invention in purely computer-readable program code, the same program can be implemented in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system, apparatus, and their modules provided by this invention can be considered a hardware component, and the modules included therein for implementing various programs can also be considered structures within the hardware component; alternatively, modules for implementing various functions can be considered both software programs implementing the method and structures within the hardware component.

[0041] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A method for fabricating a high-voltage supercapacitor structure that can be integrated in-plane series, characterized in that, include: Step S1: Based on the electrical insulation properties of the continuous insulating fiber fabric, plan the circuit topology on the fabric surface to define multiple discrete energy storage unit regions and insulating isolation regions located between the unit regions; prepare an anti-permeability mask according to the plan and cover the insulating isolation regions and the edge of the fabric. Step S2: Vacuum filtration is performed on the insulating continuous fiber fabric as a filter membrane. A filtration printing process is performed on the energy storage unit area without a mask. A dispersion of carbon-containing material is added to the energy storage unit area and deposited by filtration. An active functional layer with a preset pattern is formed on the surface of the fabric to obtain a conductive fiber preform. Step S3: Infiltrate structural resin into the exposed fiber area corresponding to the insulation isolation area and pre-cur it to construct a rigid insulation wall that runs through the thickness direction of the fabric, thereby realizing the physical connection between adjacent energy storage unit areas and the complete blockage of ion transport channels. Step S4: Between adjacent energy storage unit areas, an electronic conduction path is constructed across the rigid insulating wall to electrically connect the negative electrode region of the previous energy storage unit with the positive electrode region of the next energy storage unit, forming an in-plane series integrated energy storage unit. Step S5: Place the integrated energy storage unit component processed in step S4 into a mold or vacuum bag, inject the structural electrolyte precursor, and perform in-situ curing and molding under controlled pressure.

2. The method for fabricating a high-voltage supercapacitor with an in-plane series integration structure according to claim 1, characterized in that, The insulating continuous fiber fabric in step S1 is a glass fiber, aramid fiber, basalt fiber, hemp fiber, or wood fiber fabric; the dispersion in step S2 is an organic dispersion in which a high specific surface area carbon material is dispersed in N-methylpyrrolidone, and the high specific surface area carbon material is a carbon nanotube, carbon nanofiber, or graphene.

3. The method for fabricating a high-voltage supercapacitor with an in-plane series integration structure according to claim 1, characterized in that, In step S2, the loading of the active functional layer is gradient-controlled by the filtration volume, ranging from 1 to 10 mg / cm².

4. The method for fabricating a high-voltage supercapacitor with an in-plane series integration structure according to claim 1, characterized in that, In step S3, the width of the rigid insulating wall is designed to be greater than the gap between two adjacent energy storage unit areas, and it partially overlaps with the active functional layer at the edge of the insulating isolation area, forming a seepage-proof buffer zone.

5. The method for fabricating a high-voltage supercapacitor with an in-plane series integration structure according to claim 1, characterized in that, In step S4, the electronic conduction path is implemented using conductive silver paste, metal tabs, or a deposited metal layer; the electronic conduction path is located on the surface or between the layers of the rigid insulating wall and is encapsulated and protected by the subsequently cured structural resin.

6. The method for fabricating a high-voltage supercapacitor with an in-plane series integration structure according to claim 1, characterized in that, The structural electrolyte precursor in step S5 is a dual continuous phase system, including a thermosetting resin phase that provides mechanical strength and an ionic liquid / lithium salt phase that provides ion transport capability. During the curing process, the rigid insulating wall pre-cured in step S3 is used as a fluid boundary to restrict the liquid electrolyte to wetting and curing only in its own independent energy storage unit area.

7. The method for fabricating a high-voltage supercapacitor with an in-plane series integration structure according to claim 1, characterized in that, The energy storage unit area is configured as a symmetrical supercapacitor unit or an asymmetrical lithium-ion capacitor unit; when configured as an asymmetrical lithium-ion capacitor unit, carbon nanotubes are printed by vacuum filtration in the positive electrode area, and pre-embedded lithium carbon material or lithium titanate material is printed by vacuum filtration in the negative electrode area.

8. A supercapacitor with an in-plane series-integrated high-voltage structure, prepared by the method for fabricating a supercapacitor with an in-plane series-integrated structure according to any one of claims 1 to 7, characterized in that, include: Insulating fiber fabric substrate, carbon material active coating, rigid insulating wall, structural electrolyte, electronic pathway wire, positive and negative electrodes; Multiple discrete carbon material active coatings are disposed on the insulating fiber fabric substrate, and the carbon material active coatings constitute the energy storage unit area; The rigid insulating wall is made of structural resin and extends through the insulating fiber fabric substrate. The rigid insulating wall is located in the insulating isolation area between the energy storage unit areas, physically separating adjacent energy storage unit areas. The structural electrolyte is filled and solidified in each of the energy storage unit areas, and the structural electrolyte wets and coats the active coating of the carbon material. The electronic pathway conductor crosses the rigid insulating wall and is electrically connected to the current collection area of ​​the adjacent energy storage unit area; The positive and negative electrodes are connected to the end of the active coating of the carbon material in the outermost energy storage unit area.

9. The in-plane series-integrated high-voltage supercapacitor according to claim 8, characterized in that, The capacitor is a single-layer or multi-layer composite plate structure; the capacitor contains multiple independent energy storage units that are physically connected through the insulating fiber fabric substrate and ion-isolated by the rigid insulating wall; the multiple independent energy storage units are internally connected in series through the electronic pathway wires.

10. The in-plane series-integrated high-voltage supercapacitor according to claim 8, characterized in that, The capacitor is a laminated load-bearing component, and the electronic pathway wires are encapsulated inside the laminate by cured structural resin; the positive and negative electrodes are led out from the edge of the laminate as tabs.

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