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Packaging outer layer and preparation method thereof as well as micro supercapacitor

A supercapacitor, miniature technology, applied in the direction of hybrid/electric double layer capacitor manufacturing, hybrid box/housing/packaging, etc., can solve the thickness of the packaging layer (tens to hundreds of microns, thickness is only a few hundred nanometers to several 10 microns and other problems, to achieve the effect of low technical cost, easy large-scale production, and improved comprehensive performance

Inactive Publication Date: 2018-08-31
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thickness of the packaging layer obtained by the existing micro-supercapacitor packaging technology is too thick (tens to hundreds of microns), while the thickness of the working electrode of the micro-supercapacitor is only a few hundred nanometers to tens of microns, so the thickness of the packaging layer in the prior art needs to be orders of magnitude thinning

Method used

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  • Packaging outer layer and preparation method thereof as well as micro supercapacitor
  • Packaging outer layer and preparation method thereof as well as micro supercapacitor
  • Packaging outer layer and preparation method thereof as well as micro supercapacitor

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preparation example Construction

[0025] A method for preparing the outer layer of a micro-supercapacitor package provided by an embodiment of the present invention includes:

[0026] S1. Preparation of silane coupling agent solution.

[0027] The molecular structure formula of silane coupling agent is generally: Y-R-Si(OR) 3 (wherein Y-organofunctional group, SiOR-silyloxy group). Siloxyl groups are reactive towards inorganics and organofunctional groups are reactive or compatible with organics. When the silane coupling agent is interposed between the inorganic and organic interfaces, a bonding layer of organic matrix-silane coupling agent-inorganic matrix can be formed. Therefore, in this implementation, the silane coupling agent solution is used to prepare the outer packaging layer of the micro-supercapacitor, which can effectively reduce the thickness of the outer packaging layer of the micro-supercapacitor.

[0028] Further, the silane coupling agent solution is obtained by configuring glue A of the si...

Embodiment 1

[0055] A micro-supercapacitor provided in this embodiment includes: interdigitated electrodes, PVA / KOH electrolyte, Au film current collector, and an outer packaging layer.

[0056] The encapsulation outer layer is prepared as follows:

[0057] Select the commercial US-made Dow Corning Sylgard 184A glue and Dow Corning Sylgard 184B cross-linking agent, and prepare the silane coupling agent solution according to the mass ratio of 2:1. After stirring evenly, remove air bubbles in a vacuum container to obtain a transparent homogeneous Silane coupling agent solution. The silane coupling agent solution was uniformly dispersed on the entire outer surface of the micro-supercapacitor to obtain an outer packaging layer with a thickness of 5 μm, which was then dried naturally for 12 hours.

Embodiment 2

[0059] A micro-supercapacitor provided in this embodiment includes: a planar structure electrode, a PEO / LiTFSI electrolyte, an Al film current collector, and an outer packaging layer.

[0060] The encapsulation outer layer is prepared as follows:

[0061] Select commercial US-made Dow Corning Sylgard 184A glue and Dow Corning Sylgard 184B cross-linking agent, and prepare a silane coupling agent solution according to a mass ratio of 15:1. After stirring evenly, remove air bubbles in a vacuum container to obtain a transparent homogeneous Silane coupling agent solution. The silane coupling agent solution was evenly dispersed on the entire outer surface of the micro-supercapacitor to obtain an outer packaging layer with a thickness of 20 μm, which was dried naturally for 60 hours.

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Abstract

The invention relates to the field of supercapacitors, in particular to a packaging outer layer and a preparation method thereof as well as a micro supercapacitor. The method comprises the following steps of uniformly dispersing homogeneous silane coupling agent solution on the outer surface of the micro supercapacitor and carrying out drying treatment. According to the method, the micro supercapacitor is packaged through a casting technology based on a silane coupling agent, a casting or forming mold is not needed, and the method is low in technical cost, environment-friendly and easy for mass production. The thickness of the packaging outer layer prepared by the method is only 5-20 microns, and the mechanical flexibility of the packaging outer layer is good. After the micro supercapacitor adopts the packaging outer layer, the requirements for the mechanical flexibility, the wearing and the patch type of the micro supercapacitor can be met, and the volumetric capacitance, the volume energy density, the power density, the mass energy density and the power density of the whole device of the micro supercapacitor are greatly improved.

Description

technical field [0001] The invention relates to the field of supercapacitors, in particular to a packaging outer layer, a preparation method thereof, and a miniature supercapacitor. Background technique [0002] Supercapacitor refers to a new type of energy storage device between traditional capacitors and rechargeable batteries. It not only has the characteristics of fast charging and discharging of capacitors, but also has the energy storage characteristics of batteries. Among them, micro-supercapacitors are widely used due to their excellent comprehensive performance. The outer packaging requirements of micro-supercapacitors are getting higher and higher. [0003] In the prior art, the package outer layer of the cylindrical wound supercapacitor is usually an aluminum shell, which is packaged by a multi-point welding method. This multi-point welding aluminum shell technology or hot-pressed aluminum-plastic film packaging technology is based on supercapacitors with a sand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/80H01G11/84
CPCY02E60/13H01G11/80H01G11/84
Inventor 张海涛黄海超黄宇陈潜崔福琪邓维礼杨维清
Owner SOUTHWEST JIAOTONG UNIV
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