Polyurethane-based integrated stretchable supercapacitor and construction method thereof

A technology for supercapacitors and construction methods, which is applied in the field of polyurethane-based integrated stretchable supercapacitors and their construction, and can solve the problem of weak interface between electrodes and electrolytes, restrictions on large-scale applications of electrochemical performance, and unsatisfactory energy density, etc. problem, to achieve the effect of solving the interface bonding problem, excellent resistance to deformation, and excellent rate performance

Active Publication Date: 2022-03-01
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing integrated stretchable supercapacitors still have many problems such as low working voltage, poor tensile deformation performance, unsatisfactory energy density, weak interface between electrodes and electrolyte, and complicated assembly process, which seriously restrict their electrochemical performance. Performance improvements and large-scale applications

Method used

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  • Polyurethane-based integrated stretchable supercapacitor and construction method thereof
  • Polyurethane-based integrated stretchable supercapacitor and construction method thereof
  • Polyurethane-based integrated stretchable supercapacitor and construction method thereof

Examples

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preparation example Construction

[0039] The preparation of stretchable electrodes based on polyurethane features includes the following steps.

[0040] (1) Add 10.0 g of polyoxyethylene diol with a molecular weight of 1000 into a four-neck round bottom flask, heat to 110°C in an oil bath, and vacuumize for 2 hours to remove water. After cooling down to 90°C, add 5.08 g (0.02 mol) isophorone diisocyanate and 0.78 g (0.003 mol) N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate sodium chain extender in sequence , control the molar ratio of hydroxyl groups to isocyanate groups in the system to be 1:1.5, rinse the beaker with an appropriate amount of N,N-dimethylacetamide solvent and pour it into it, and pre-polymerize at 90°C for 6 hours in an argon atmosphere to obtain Prepolymer A solution.

[0041] (2) Add conductive carbon black and silver nanowires with a mass ratio of 10:3 as conductive fillers into N,N-dimethylacetamide solvent, and obtain uniform carbon black / silver nanowires after ultrasonic treatment and ...

Embodiment 2

[0054] The preparation of stretchable electrodes based on polyurethane features includes the following steps.

[0055] (1) Add 20.0 g of polyethylene oxide diol with a molecular weight of 2000 into a four-neck round bottom flask, heat to 110°C in an oil bath, and vacuumize for 2 hours to remove water. After cooling down to 90°C, 5.24 g (0.02 mol) of 4,4'-dicyclohexylmethane diisocyanate and 1.46 g (0.005 mol) of dimethyl isophthalate-5-sodium sulfonate chain extender were sequentially added to control The molar ratio of hydroxyl groups to isocyanate groups is 1:1.3, and the beaker is rinsed with an appropriate amount of N,N-dimethylformamide solvent and poured into it, and prepolymerized at 80°C for 6 hours in an argon atmosphere to obtain prepolymer A solution.

[0056] (2) Add conductive carbon black and silver nanowires with a mass ratio of 10:2 as conductive fillers into N,N-dimethylformamide solvent, and obtain uniform carbon black / silver nanowires after ultrasonic treat...

Embodiment 3

[0065] The preparation of stretchable electrodes based on polyurethane features includes the following steps.

[0066] (1) Add 15.0 g of polyoxyethylene diol with a molecular weight of 1500 into a four-neck round bottom flask, heat to 110°C in an oil bath, and vacuumize for 2 hours to remove water. After cooling down to 90°C, add 4.21 g (0.025 mol) hexamethylene diisocyanate and 0.52 g (0.002 mol) N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate sodium chain extender in sequence , control the molar ratio of hydroxyl groups to isocyanate groups to be 1:2, and rinse the beaker with an appropriate amount of N,N-dimethylacetamide solvent and pour it into it, pre-polymerize at 90°C for 6 hours in an argon atmosphere, and obtain the pre- Polymer A solution.

[0067] (2) Add conductive carbon black and carbon nanotubes with a mass ratio of 10:3 as conductive fillers into N,N-dimethylacetamide solvent, and obtain uniform carbon black / carbon nanotubes after ultrasonic treatment and mech...

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Abstract

The invention relates to a polyurethane-based integrated stretchable supercapacitor and a construction method thereof, an intrinsic stretchable electrode is obtained by coating a polyurethane-based stretchable current collector with an electrochemical active substance, and then a polyurethane-based stretchable porous fiber membrane is formed on the surface of the stretchable electrode in situ through an electrostatic spinning technology. And then the electrode is tightly attached to the other stretchable electrode through pressing, and after the electrode is soaked in an electrolyte of high-concentration alkali metal salt, the integrated stretchable supercapacitor is finally obtained through packaging. According to the integrated stretchable supercapacitor constructed by the invention, the strong adhesion between the intrinsic stretchable electrode and the stretchable electrolyte is realized, the interface impedance is remarkably reduced, and the supercapacitor is endowed with the stable electrochemical performance in the deformation process.

Description

technical field [0001] The invention relates to the technical field of new energy materials, in particular to a polyurethane-based integrated stretchable supercapacitor and a construction method thereof. Background technique [0002] As an efficient energy storage and power supply device for wearable electronics, all-in-one stretchable supercapacitors have attracted much attention due to their high power density and cycle life as well as tight interfacial contact and excellent mechanical properties. [0003] Integrated stretchable supercapacitors can be divided into sandwich structure, coaxial fiber structure, non-coaxial fiber structure and interdigital structure according to different shapes. Among them, the integrated stretchable supercapacitor with sandwich structure has the advantages of high specific capacitance, simple assembly process and large-scale production, and has been widely studied by researchers. Guo Xin et al. reported that polyacrylamide / sodium alginate w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/48H01G11/04
CPCH01G11/86H01G11/48H01G11/04Y02E60/13
Inventor 王庚超穆宏春朱羿璇王文强黄新明张若楠王梓谕
Owner EAST CHINA UNIV OF SCI & TECH
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