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A kind of flexible supercapacitor that can be cut freely and its preparation method

A supercapacitor, flexible technology, applied in the field of flexible supercapacitors and its preparation, can solve the problems of low ion conductivity, limit the power density of energy storage devices, etc., achieve the effect of improving conductivity, preventing loss and decomposition, and improving performance

Active Publication Date: 2022-05-03
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ionic conductivity of typical solid electrolytes is low and much slower than that of their liquid counterparts, which greatly limits the power density of corresponding energy storage devices.

Method used

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  • A kind of flexible supercapacitor that can be cut freely and its preparation method
  • A kind of flexible supercapacitor that can be cut freely and its preparation method
  • A kind of flexible supercapacitor that can be cut freely and its preparation method

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preparation example Construction

[0053] In another embodiment, a method for preparing the arbitrarily tailorable flexible supercapacitor includes the following steps:

[0054] (1) forming a first electrode and a second electrode on the first flexible substrate and the second flexible substrate respectively;

[0055] (2) Scrape coating the electrolyte with self-encapsulation function on at least one of the first electrode and the second electrode;

[0056] (3) Bonding the two electrodes in step (2) face to face, and standing under predetermined conditions, the electrolyte solution forms an electrolyte layer to obtain the flexible supercapacitor.

[0057] Further, the method of forming the electrode on the substrate in step (1) includes but is not limited to: making the electrode material into a slurry, forming an electrode with a predetermined thickness on the substrate by suspension coating or doctor blade coating, or directly writing the electrode by laser direct writing. An electrode with a predetermined t...

Embodiment 1

[0060] A flexible supercapacitor that can be tailored arbitrarily is prepared by the following steps:

[0061] (1) Preparation of electrodes:

[0062] The small commercial laser engraving machine used in this embodiment is a diode laser, and any power within 0-3W can be obtained by adjusting the parameters, and it can be considered accurate within a certain error range. The polyimide film is purchased from DuPont The company, the specific model is Kapton, the color is light yellow, and the specific thickness is 0.0125-0.025mm, which can be considered accurate within a certain error range.

[0063] Use laser processing technology to induce porous graphene film: cut the 0.025mm thick polyimide film into a square with a size of 10cm*10cm, reserve a square processable area with an area of ​​9cm*9cm, and then use a fixing device (such as Adhesive tape) to fix the film on a flat substrate, wherein the flat substrate includes but not limited to: float glass, acrylic board, etc. The...

Embodiment 2

[0070] A flexible supercapacitor that can be tailored arbitrarily is prepared by the following steps:

[0071] (1) preparation of electrode: with the step (1) of embodiment 1

[0072] (2) Preparation of electrolyte:

[0073] Electrolyte preparation process with self-encapsulation function: Na 2 SO 4 Dissolve in water to form a 0.4mol / L solution, and then add 50% water-based alkyd resin to the solution by mass ratio (in the electrolyte, the mass fraction of water-based alkyd resin is 50%), wherein the water-based alkyd resin Purchased from Jining Tainuo Chemical Co., Ltd., that is, X in formula (I) is derived from phthalic acid, R 5 is an acrylate group, R 4 Derived from soybean oil. According to the DDS-11A of the Shanghai Lei Magnetic Desktop Digital Display Conductivity Meter Conductivity Meter Laboratory, the conductivity of the electrolyte in this embodiment is 4.3mS cm -1 . Stir for 24 hours with a magnet, and after mixing evenly, let it stand for defoaming to obta...

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Abstract

The invention discloses a flexible supercapacitor that can be cut at will and a preparation method thereof. The flexible supercapacitor includes a first flexible substrate, a first electrode formed on the first flexible substrate, a second flexible substrate, and a flexible supercapacitor formed on the first flexible substrate. The second electrode on the second flexible substrate, and the electrolyte layer between the first electrode and the second electrode, the electrolyte layer includes a periphery formed by solidifying an electrolyte solution with a self-encapsulation function and The electrolyte in a liquid state within the periphery. The flexible supercapacitor of the present invention can greatly improve the electrical conductivity of the supercapacitor, and can realize self-encapsulation after cutting, so as to achieve the effect of arbitrary cutting.

Description

technical field [0001] The invention belongs to the technical field of flexible energy storage devices, in particular to a flexible supercapacitor that can be cut arbitrarily and a preparation method thereof. Background technique [0002] With the further development of science and technology, portable electronic devices are leading the trend of commercial electronic products mainly because of their novel features of flexibility, light weight and small size. Energy storage units such as batteries and supercapacitors are key components of wearable electronic devices. Supercapacitors are a new type of high-efficiency energy storage device between batteries and traditional capacitors. The advantages of ultra-long service life and safety have attracted the attention of researchers. From an ergonomic point of view, these energy storage units for portable supercapacitors should be able to be made into arbitrary shapes, unlike traditional coins, cylinders, or squares, to meet high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/58H01G11/80H01G11/86H01G11/22
CPCH01G11/58H01G11/80H01G11/22H01G11/86Y02E60/13
Inventor 杨诚任汐胡盛逾
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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