Flexible electrode, capacitor and preparation method

A flexible electrode, electrochemical technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc., can solve the problems of insufficient electrode ductility of flexible supercapacitors, insufficient ductility of flexible supercapacitors, etc. Achieving high effective surface area and stretchability, increasing effective surface area, increasing versatility

CN112216519AActive Publication Date: 2021-01-12XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-01-12

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Abstract

The invention belongs to the field of micro-nano manufacturing and new energy, and discloses a flexible electrode, a capacitor and a preparation method, in the flexible electrode, an electrochemical functional material is distributed on a PU-CNT conductive film substrate, wherein the PU-CNT conductive thin film substrate comprises a PU thin film substrate and a CNT conductive network, the PU thinfilm substrate is of a net structure, carbon nanotubes are distributed on the fiber surface of the PU thin film substrate, and the carbon nanotubes distributed on the PU thin film substrate form the CNT conductive network. In the capacitor, flexible electrodes are bonded to the two surfaces of a gel electrolyte interlayer, the flexible electrodes and the gel electrolyte interlayer form a sandwichsuper capacitor structure, flexible packaging protection layers are attached to the two surfaces of the sandwich super capacitor structure, and the flexible electrodes on the two sides of the gel electrolyte interlayer are connected with electrode outgoing lines. The flexible electrode provided by the invention has excellent ductility, and the flexibility of the capacitor can be improved, so thatthe flexible wearable device has excellent flexibility.
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Description

technical field

[0001] The invention belongs to the field of micro-nano manufacturing and new energy, and specifically relates to a flexible electrode, a capacitor and a preparation method. Background technique

[0002] With the continuous development of portable and flexible electronic products, the demand for flexible high-performance energy storage devices in human society is increasing, and how to prepare high-performance, low-cost wearable energy storage devices has attracted more and more attention. Energy storage devices such as batteries are limited by defects such as low power density, short service life, and long charging and discharging time, and their development is restricted. As a new type of energy storage device, supercapacitors can provide extremely high power density, and at the same time have the advantages of long cycle life and short charge and discharge time, and have been widely studied by scientists in recent years.

[0003] However, the ductility of...

Examples

Embodiment

[0058] Polyurethane PU is used to configure the electrospinning precursor solution, and 5g dimethylamide and 5g acetone are mixed and stirred to prepare a solvent, and 3g PU powder is dissolved in the above solvent to obtain a 30wt% electrospinning precursor solution, and the electrospinning solution is extracted with a syringe. Silk precursor solution 5mL, after installing the spinning needle, connect it to the syringe pump, set the liquid output rate of the syringe pump to 10mL / h, then connect the spinning needle to the positive pole of the high-voltage power supply, connect the fiber collector to the negative pole of the high-voltage power supply and ground, adjust The distance between the spinning needle and the fiber collector is 15 cm, and the output voltage of the high-voltage power supply is set to 10 kV. After spinning for one hour, turn off the high-voltage power supply and the syringe pump to obtain the PU film substrate 6;

[0059] Add 50 mg of sodium dodecylbenzen...