Conductivity enhancing liquid for paper substrate of supercapacitor, paper substrate and preparation method

A supercapacitor and conductive enhancement technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems of poor electrode conductivity, poor flexibility of metal substrate electrodes, and shedding of active electrode materials. performance, is conducive to rapid film formation, and the effect of fast drying

Active Publication Date: 2022-04-12
SHENZHEN JIANGHAO ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flexibility of the metal substrate electrode is poor. When manufacturing a wound supercapacitor, the active electrode material is easy to fall off from the metal substrate, resulting in poor conductivity of the electrode.

Method used

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  • Conductivity enhancing liquid for paper substrate of supercapacitor, paper substrate and preparation method
  • Conductivity enhancing liquid for paper substrate of supercapacitor, paper substrate and preparation method
  • Conductivity enhancing liquid for paper substrate of supercapacitor, paper substrate and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] By weight percentage, take 81% poly-3,4-ethylenedioxythiophene-polystyrenesulfonic acid (PEDOT-PSS) aqueous dispersion liquid as conductive polymer, take 5% ethanol as cosolvent, take 3% Polyethylene glycol-400 was used as a wetting agent, 7% of mannitol was used as a flow aid, and 4% of dimethyl sulfate was used as a conductive promoter. Add each component into the stirring container, adjust the stirring frequency to 50Hz, the rotating speed is 650rpm, stir for 15 minutes, then adjust the stirring frequency to 40Hz, rotating speed 3500rpm, continue stirring for 15 minutes to obtain a mixed solution, and then mix the mixed solution at a frequency of 40KHz Ultrasonic vibration was performed for 1.5 hours to obtain a conductivity-enhancing solution, and the viscosity of the conductivity-enhancing solution was detected to be 14.5 mPa·s.

[0052] Add the conductive enhancing liquid to the liquid storage tank of the vertical spraying machine, and use the rolling roller to re...

Embodiment 2

[0054] The difference from Example 1 is that the proportioning ratio by weight of the conductive enhancing liquid is: 82% poly 3,4-ethylenedioxythiophene-polystyrene sulfonic acid (PEDOT-PSS) aqueous dispersion liquid is used as the conductive polymer, which is taken as 3% ethylene glycol is used as a cosolvent, 3% polyethylene glycol-600 is used as a wetting agent, 8% sorbitol is used as a flow aid, and 4% ethylene carbonate is used as a conductive promoter. The viscosity of the conductivity enhancing liquid is 22.5 mPa·s. When spraying, the discharge speed is 0.7m / min, and the drying temperature is 115°C.

Embodiment 3

[0056] The difference from Example 1 is that the proportioning ratio by weight of the conductive enhancing liquid is: 83% poly-3,4-ethylenedioxythiophene-polystyrenesulfonic acid (PEDOT-PSS) aqueous dispersion as the conductive polymer, which is taken as 2.5% isopropanol as co-solvent, 2.5% polyethylene glycol-600 as wetting agent, 9% sorbitol as flow aid, 3% vinyl sulfite as conduction promoter, The viscosity of the conductivity enhancing liquid is 22.2 mPa·s. When spraying, the discharge speed is 0.9m / min, and the drying temperature is 120°C.

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Abstract

The invention relates to the field of paper-based supercapacitors, and particularly discloses a conductive enhancing liquid for a paper substrate of a supercapacitor, the paper substrate and a preparation method. The conductive enhancing liquid comprises the following components in percentage by weight: 81-90% of a conductive polymer, 2-5% of a cosolvent, 1-3% of a wetting agent, 5-9% of a flow promoter and 2-4% of a conductive accelerant, the cosolvent is monohydric alcohol and/or polyhydric alcohol, the wetting agent is polyethylene glycol, the flow promoter is sugar alcohol, and the conductive accelerant is sulfate and/or carbonic ester; the surface of the paper substrate is coated with the conductive enhancing liquid. The conductive enhancing liquid is excellent in conductivity and can form a conductive film on the paper substrate, so that the conductivity of the paper substrate is greatly improved, and the paper substrate is simple in preparation process and low in production cost.

Description

technical field [0001] The present application relates to the field of paper-based supercapacitors, more specifically, it relates to a conductive enhancing liquid for supercapacitor paper substrates, a paper substrate and a preparation method. Background technique [0002] A supercapacitor is an energy storage device between a battery and a conventional capacitor for storing electrical energy. It is a new type of component that stores energy through an interfacial double layer formed between an electrode and an electrolyte. [0003] The electrodes of supercapacitors are mostly made of metal substrates, which are made by covering or attaching active electrode materials on the metal substrates. However, the flexibility of metal substrate electrodes is poor. When fabricating wound supercapacitors, the active electrode material is easy to fall off from the metal substrate, resulting in poor conductivity of the electrodes. Based on this, paper has been used as the electrode subs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/86
Inventor 尹超徐荣尹志华
Owner SHENZHEN JIANGHAO ELECTRON
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