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High and low temperature flexible fibrous supercapacitor and preparation method and application thereof

A supercapacitor, fiber-like technology, applied in the field of capacitors, can solve the problems of low energy density, explosion, liquid electrolyte leakage, etc., and achieve the effects of strong weaving ability, high performance and safety, and easy mass production

Inactive Publication Date: 2018-08-24
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still great challenges in extreme environments, including low energy density, large capacity fading, expensive electrolytes (ionic liquids), and leakage safety issues of liquid electrolytes.
[0003] Most of the currently researched fibrous supercapacitors are based on highly toxic and flammable organic electrolytes (acetonitrile, which has high volatility and low ignition point) or high-viscosity expensive ionic liquid electrolytes or concentrated acids (H 2 SO 4 ,H 3 PO 4 ) and alkaline (NaOH) solvents which have great safety hazards
In particular, flexible wearable electronic devices are directly pasted on people's skin. In practical applications, such electronic devices will inevitably be bent or twisted. Once leakage occurs, these potential safety problems will be more serious.
However, so far, most of the current research on fiber-shaped capacitors is still at room temperature, especially in the severe winter (below -20°C) to the hot equatorial region (above 40°C). Can't work and can't meet people's needs
The performance of capacitors will deteriorate in extreme environments, such as capacitance decay, increased internal resistance, increased cycle life, and explosion due to increased internal heat, which will severely limit its practical applications
[0004] To the best of our knowledge, high-energy-density fibrous wearable flexible aqueous capacitors in extreme environments from below −30 °C to above 50 °C have not been reported so far.

Method used

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  • High and low temperature flexible fibrous supercapacitor and preparation method and application thereof
  • High and low temperature flexible fibrous supercapacitor and preparation method and application thereof
  • High and low temperature flexible fibrous supercapacitor and preparation method and application thereof

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Effect test

Embodiment 1

[0033] as attached Figure 12 As shown, two conductive polymer composite fibers 1 with a core-shell structure are arranged in parallel at a distance of 1 mm, and the two ends are fixed on the PET film 2 with conductive tape and conductive silver glue 3, and the surface is coated with lithium chloride-PVA gel electrolysis. Solution 4, that is, the high and low temperature flexible fibrous supercapacitor integrated device is prepared.

Embodiment 2

[0035] Two conductive polymer composite fibers with a core-shell structure are arranged in parallel at a distance of 1mm, and the two ends are fixed on the PET film with conductive tape and conductive silver glue, and the surface is coated with potassium sulfate-PVA gel electrolyte to obtain a high-low temperature flexible fiber. All-in-one device of fibrous supercapacitor.

Embodiment 3

[0037] Two conductive polymer composite fibers with a core-shell structure are arranged in parallel at a distance of 1mm, and the two ends are fixed on the PET film with conductive tape and conductive silver glue, and the surface is coated with sodium sulfate-PVA gel electrolyte to obtain a high-low temperature flexible fiber. All-in-one device of fibrous supercapacitor.

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Abstract

The invention provides a preparation method of a high and low temperature flexible fibrous supercapacitor, two conductive polymer composite fiber electrodes are parallelly arranged at a certain interval, two ends are fixed on a PET film by use of a conductive adhesive tape and conductive silver adhesive, surfaces are coated with aqueous gel electrolytes, and thus a high and low temperature flexible fibrous supercapacitor integrated device is prepared. The invention also provides a high and low temperature flexible fibrous supercapacitor and application thereof. The high and low temperature flexible fibrous supercapacitor still maintains high energy density in a wide-temperature range environment from 60 to 100 DEG C, and has ultrahigh safety performance, and the performance is not affectedwhen the supercapacitor is bent at an arbitrary angle.

Description

technical field [0001] The invention relates to a capacitor, in particular to a preparation method of a water system high and low temperature capacitor and its application in extreme environments. Background technique [0002] Wearable electronics and e-textiles are rapidly developing and have promising application prospects in portable electronic devices. Fibrous supercapacitors have the characteristics of small size, high flexibility, and easy design into various structures, so they are recognized as the most potential energy storage electronic materials. Compared with traditional two-dimensional supercapacitors and batteries, the lower specific energy of one-dimensional fibrous supercapacitors limits its applications. Although there has been great progress in improving the energy density of fiber-shaped capacitors, such as designing high specific capacitance, high conductivity carbon materials, embedding some pseudocapacitive metal oxides, by assembling into asymmetric c...

Claims

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Application Information

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IPC IPC(8): H01G11/84H01G11/86H01G11/24H01G11/48H01G11/30H01G11/46
CPCH01G11/24H01G11/30H01G11/46H01G11/48H01G11/84H01G11/86Y02E60/13
Inventor 王斌程建丽王转培
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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