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Stretchable planar micro-supercapacitor and preparation method thereof

A supercapacitor, miniature technology, applied in the direction of hybrid/electric double layer capacitor manufacturing, hybrid box/housing/packaging, etc., can solve problems such as not easy to disperse, achieve the effect of improving electronic conductivity, excellent mechanical properties, and mature technology

Active Publication Date: 2022-07-19
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its large surface tension, it is not easy to disperse in solvents

Method used

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  • Stretchable planar micro-supercapacitor and preparation method thereof
  • Stretchable planar micro-supercapacitor and preparation method thereof
  • Stretchable planar micro-supercapacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A kind of exfoliated graphene / manganese dioxide (MnO 2 ) preparation method of asymmetric stretchable MSCs, the specific steps of the method are as follows:

[0053] (1) Preparation of TPU stretchable nanofiber membrane by electrospinning

[0054] The stretchable nanofiber membrane was prepared by adjusting the TPU spinning solution formulation, the speed, voltage, and temperature of electrospinning, and then by adjusting the spinning time, a reasonable membrane thickness suitable for S-MSCs was determined;

[0055] The spinning solution formula is: TPU 25wt%, the balance is DMF, and the total weight of the spinning solution is 100%.

[0056] Electrospinning parameters: spinning speed 2mL / h, voltage 20kv, spinning temperature 25℃±5℃, spinning time 6h, TPU stretchable film thickness 0.5mm.

[0057] (2) Patterned self-healing interdigitated current collectors

[0058] Disperse gallium indium alloy (EGaIn) with silk fibroin to obtain EGaIn conductive dispersion with goo...

Embodiment 2

[0083] A preparation method of graphene / zinc oxide (ZnO) asymmetric S-MSCs, the specific steps of the method are as follows:

[0084] (1) Preparation of TPU stretchable nanofiber membrane by electrospinning: the preparation method is the same as that in Example 1.

[0085] (2) Patterned self-healing current collectors

[0086] The gallium indium alloy (EGaIn) (shown in Supplementary Example 1) was dispersed with silk fibroin, sodium alginate or polyvinylpyrrolidone, respectively, to obtain EGaIn conductive dispersion with good dispersion stability, which was patterned with the aid of a mask to obtain EGaIn high conductivity self-healing current collector;

[0087] (3) Mask-assisted preparation of asymmetric electrodes

[0088] Electrode dispersions with graphene electric double layer capacitance characteristics and ZnO pseudocapacitance characteristics were prepared, and the asymmetric electrodes were obtained by adjusting the concentration of the dispersions and performing ...

Embodiment 3

[0096] A preparation method of graphene / alum oxide asymmetric S-MSCs, the specific steps of the method are as follows:

[0097] (1) TPU stretchable nanofiber membrane was prepared by electrospinning, and the preparation method was the same as that in Example 1.

[0098] (2) Patterned self-healing current collectors

[0099] Using CMC to disperse gallium indium alloy (EGaIn) to obtain a conductive dispersion of EGaIn with good dispersion stability, and patterning it with the aid of a mask (customized according to the design requirements of the energy storage device) to obtain an EGaIn highly conductive self-healing current collector;

[0100] (3) Mask-assisted preparation of asymmetric electrodes

[0101] Electrode dispersions with electrical double layer capacitance properties of graphene and pseudocapacitance properties of vanadium oxide were prepared, and asymmetric electrodes were obtained by adjusting the concentration of the dispersions and performing precise suction fil...

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Abstract

The invention relates to an energy storage system device, in particular to a stretchable micro supercapacitor and a preparation method thereof, belonging to the technical field of energy storage devices. A preparation method of a stretchable micro supercapacitor, the method comprises the following steps (1) electrospinning to prepare a stretchable nanofiber film, (2) patterning to obtain a self-healing high conductive current collector, (3) masking Membrane-assisted fabrication of asymmetric electrodes and (4) gel electrolyte coating and encapsulation of stretchable MSCs. On the one hand, the present invention prepares a high elongation, flexible and thin TPU substrate by electrospinning to endow MSCs with stretchability, and on the other hand, utilizes the excellent electronic conductivity, rheology and self-healing properties of liquid metal to solve the stretching state Under the structural damage of MSCs, and the complementary properties of the two electrode materials, pseudocapacitance and electric double layer, the mechanical flexibility, physical conductivity and electrochemical performance of stretchable MSCs can be improved in an all-round way.

Description

technical field [0001] The invention relates to an energy storage system device, in particular to a stretchable planar micro supercapacitor and a preparation method thereof, belonging to the technical field of energy storage devices. Background technique [0002] The intelligence and functionalization of textiles have promoted the continuous progress of portable and wearable electronic products. Traditional energy storage devices are large in size and heavy in weight, and their application fields are limited. They can no longer meet the current needs. The direction of development, flexibility and functionalization. Recently, S-MSCs have attracted much attention due to their excellent mechanical properties. Among them, micro-supercapacitors (MSCs) have good research prospects in the field of S-MSCs due to their small size, light weight, fast response, and long cycle life. [0003] At present, there are two main problems in the preparation of stretchable MSCs: one is the end...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/78H01G11/84
CPCH01G11/78H01G11/84Y02E60/13
Inventor 胡毅张亚茹林航琦
Owner ZHEJIANG SCI-TECH UNIV