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Integrated self-charging micro supercapacitor device and preparation thereof

A supercapacitor and self-charging technology, applied in the field of energy storage devices, can solve problems such as affecting the conductivity of the device, unable to drive other electrical devices, easy to corrode, etc., to reduce internal resistance and heat loss, and ensure integrity and connectivity. , the preparation method is easy to operate

Active Publication Date: 2020-11-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the micro-supercapacitor devices with wireless charging capabilities are spliced, that is, the wireless charging coil and the micro-supercapacitor are connected through additional conductive materials such as wires. In the middle, a large resistance will be generated, which will affect the conductivity of the device and increase heat loss
In addition, wireless charging coils are mainly made of metals, which are easily corroded under harsh chemical conditions, and the integration and fabrication of charging coils and MSCs are very complicated and costly, thus hindering the further use of integrated systems
[0004] At present, the area capacitance and energy density of existing micro supercapacitors are small, and most of them are limited to lighting small LED lights and cannot drive other electrical devices. Therefore, micro supercapacitors with high capacity and high energy density are urgently needed to solve this problem. question

Method used

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  • Integrated self-charging micro supercapacitor device and preparation thereof
  • Integrated self-charging micro supercapacitor device and preparation thereof
  • Integrated self-charging micro supercapacitor device and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Mix 0.8 g of activated carbon, 0.1 g of PVDF, 0.1 g of Ketjen black, and 4 mL of NMP, and grind the mixture in a mortar for 20 min to obtain a uniform viscous slurry; then, coat the slurry on a surface with a size of 3.7 cm × 4cm × 50μm on one side of the graphite paper, and then put the graphite paper coated with the slurry in a vacuum oven at 60°C for 12 hours to obtain an active coating on one side of the graphite paper, and the active coating is on The loading capacity on graphite paper is 3.194±0.2mg / cm 2 ;

[0047] (2) Use a laser with a power of 20W to etch the graphite paper coated with an active coating on the surface, etch the integrated outer coil, electrode and inner coil on the graphite paper, and three parallel electrodes are located on the outer coil. Between the coil and the inner coil, and the fingers in each electrode are alternately connected with the outer coil and the inner coil, such as figure 1 shown;

[0048] The outer coil is a rectangula...

Embodiment 2

[0054] (1) Mix 0.8 g of activated carbon, 0.1 g of PVDF, 0.1 g of Ketjen black, and 4 mL of NMP, and grind the mixture in a mortar for 20 min to obtain a uniform viscous slurry; then, coat the slurry on a surface with a size of 3.7 cm × 4cm × 50μm on both sides of graphite paper, and then put the graphite paper coated with slurry in a vacuum oven at 60 ° C for 12 hours to obtain active coatings on both sides of the graphite paper, and the active coating is on The total loading on graphite paper is 23.72 mg / cm 2 ;

[0055] (2) Use a laser with a power of 20W to etch the graphite paper coated with an active coating on the surface, etch the integrated outer coil, electrode and inner coil on the graphite paper, and three parallel electrodes are located on the outer coil. Between the coil and the inner coil, and the fingers in each electrode are alternately connected with the outer coil and the inner coil;

[0056] The outer coil is a rectangular coil arranged in a helical shape....

Embodiment 3

[0061] (1) Mix 0.8 g of activated carbon, 0.1 g of PVDF, 0.1 g of Ketjen black, and 4 mL of NMP, and grind the mixture in a mortar for 20 min to obtain a uniform viscous slurry; then, coat the slurry on a surface with a size of 3.7 cm × 4cm × 50μm on both sides of graphite paper, and then put the graphite paper coated with slurry in a vacuum oven at 60 ° C for 12 hours to obtain active coatings on both sides of the graphite paper, and the active coating is on The total loading on graphite paper is 23.72 mg / cm 2 ;

[0062] (2) Use a laser with a power of 20W to etch the graphite paper coated with an active coating on the surface, etch the integrated outer coil, electrode and inner coil on the graphite paper, and three parallel electrodes are located on the outer coil. Between the coil and the inner coil, and the fingers in each electrode are alternately connected with the outer coil and the inner coil, such as figure 2 shown;

[0063] The outer coil is a rectangular coil ar...

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Abstract

The invention relates to an integrated self-charging miniature supercapacitor device and preparation thereof, and belongs to the technical field of energy storage devices. The device comprises an electrode, an electrolytic solution, a packaging material, an outer coil, an inner coil and a rectifier diode, wherein the outer coil, the inner coil and the electrode are of an integrated structure prepared through laser etching. According to the invention, the preparation process is simple, operability is high, and through the integrated design of the wireless charging coil and the miniature supercapacitor, the integrality and connectivity of the device are guaranteed, and internal resistance and heat loss of the device are reduced; graphite paper with the surface coated with an active coating is selected as an electrode, and the high capacitance, high energy density and excellent high-current charging and discharging performance of the device are achieved through the adaptability of activated carbon and conductive carbon black in the active coating to the graphite paper and an electrolyte; and the device has high bendability and toughness and has a good application prospect.

Description

technical field [0001] The invention relates to an integrated self-charging micro supercapacitor device and its preparation, belonging to the technical field of energy storage devices. Background technique [0002] As the size of portable electronic devices tends to be miniaturized, low-power integrated circuits are increasingly powered by tiny electronic devices. Among these miniature energy-supply devices, micro-supercapacitors (MSCs) have attracted widespread attention due to their advantages such as small size, high power density, long cycle life, and fast charge-discharge rate. [0003] The traditional MSC charging method is through wires connected to bulky power cords and strict contact points, which is extremely inconvenient and the wires are prone to tangle. Furthermore, for connection purposes, the power transmission elements in the line charging system are necessarily exposed to the air, causing extensive corrosion and damage to the power system. In contrast, wir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/00H01G11/26H01G11/84
CPCH01G11/00H01G11/26H01G11/84Y02E60/13
Inventor 曲良体高畅赵扬
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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