Flexible super capacitor and preparing method thereof

A supercapacitor and flexible technology, applied in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, etc., can solve the problems of weak bonding between semiconductor materials and flexible fibrous substrates, low specific energy of capacitors, and long electron transmission paths. To achieve the effect of easy promotion, reducing magnification difference, and reducing the appearance of easy damage

Inactive Publication Date: 2014-08-06
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] In view of the above defects or improvement needs of the prior art, the present invention provides a flexible supercapacitor and its preparation method, which effectively solves the problem of the low specific energy of the current capacitor, the semiconductor material with pseudocapacitive performance and the flexible fiber shape in the conventional preparation process. The problem of weak substrate bonding, disordered growth, large internal resistance, and long electron transmission path greatly improves the volume specific capacity and volume specific energy of the capacitor

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  • Flexible super capacitor and preparing method thereof

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preparation example Construction

[0021] The preparation method of above-mentioned flexible supercapacitor comprises the steps:

[0022] (1) Select two linear flexible fibrous substrates, and bend one end of one of them into a helical shape.

[0023] (2) Covering the helical flexible fibrous substrate and the linear flexible fibrous substrate obtained in step (1) with a semiconductor material having pseudocapacitive properties as the first electrode and the second electrode, respectively.

[0024] When the semiconductor material with pseudocapacitive properties is nickel cobaltate with nanostructure, the step further includes the following steps:

[0025] (2-1) Prepare a mixed solution of nickel chloride, cobalt chloride, ammonium fluoride and urea, wherein the concentration of nickel chloride is 0.03~0.12mol / L, and the concentration of cobalt chloride is 0.06~0.24mol / L , the concentration of ammonium fluoride is 0-0.45 mol / L, and the concentration of urea is 0.12-0.18 mol / L.

[0026] (2-2) Pour the above so...

Embodiment 1

[0035] Clean a nickel wire with a diameter of 200 microns in acetone, water and ethanol in sequence, and after drying, bend one end of a nickel wire into a spiral shape with an inner diameter of about 1 mm and put it into a high-pressure tube together with another wire-shaped nickel wire. In the lining of the autoclave; pour 30mL of the mixed solution of nickel chloride, cobalt chloride and urea into the lining of the autoclave, wherein the concentration of nickel chloride is 0.03mol / L, and the concentration of cobalt chloride is 0.06mol / L L, the concentration of urea is 0.12mol / L; put the reactor into a drying oven at 120°C to react for 6 hours, and cool to room temperature naturally after the reaction; take out the sample and calcinate it in a muffle furnace at 300°C for 3 hours, A first electrode and a second electrode of nickel cobaltate covered with nanostructures are obtained. From the scanning electron microscope photos, it can be seen that the needle-like nanowires are...

Embodiment 2

[0038]Clean a nickel wire with a diameter of 200 microns in acetone, water and ethanol in sequence, and after drying, bend one end of a nickel wire into a spiral shape with an inner diameter of about 1 mm and put it into a high-pressure tube together with another wire-shaped nickel wire. In the lining of the autoclave; pour 30mL of the mixed solution of nickel chloride, cobalt chloride and urea into the lining of the autoclave, wherein the concentration of nickel chloride is 0.12mol / L, and the concentration of cobalt chloride is 0.24mol / L L, the concentration of urea is 0.12mol / L; put the reaction kettle into a 150°C oven for 12 hours, and cool to room temperature naturally after the reaction; take out the sample and calcinate it in a muffle furnace at 300°C for 3 hours, A first electrode and a second electrode of nickel cobalt oxide covered with nanostructures are obtained. From the scanning electron microscope photos, it can be seen that the nanowires are obviously thicker a...

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Abstract

The invention discloses a flexible super capacitor and a preparing method thereof. The flexible super capacitor comprises electrolyte, a first electrode and a second electrode. The two electrodes are formed by flexible fibrous bases with the surfaces covered by semiconductor materials with pseudo capacitance. One end of the first electrode is of a spiral structure, the second electrode is of a linear structure, and the second electrode is arranged in the spiral structure of the first electrode. The electrolyte wraps the spiral structure of the first electrode and the part, located in the spiral structure of the first electrode, of the second electrode, and the two electrodes are fully combined. The flexible super capacitor effectively solves the problems that an existing capacitor is low in specific energy, in the conventional preparing technology, combination of the semiconductor material with pseudo capacitance and the flexible fibrous base is not firm, the semiconductor material and the flexible fibrous base grow in a disorderly mode, internal resistance is high, and an electronic transmission route is long, and the volumetric specific volume and volumetric specific energy of the capacitor are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of energy devices, and more specifically relates to a flexible supercapacitor and a preparation method thereof. Background technique [0002] With the development of science and technology, thinning and flexibility are important development trends of portable electronic products. Foldable or bendable portable electronic products may greatly affect or even change human life style in the near future. Energy storage devices are the core components of portable electronic products. The development of high-performance flexible energy storage devices, such as flexible lithium-ion batteries and flexible supercapacitors, is one of the keys to the wide application of flexible electronic products. In August 2013, flexible technology has been selected by foreign media as one of the top ten technological advances in the world in 2013, and in October, LG announced that it has successfully mass-produced flexible display sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/22H01G11/30H01G11/86
CPCY02E60/13
Inventor 沈国震王秋凡陈娣
Owner HUAZHONG UNIV OF SCI & TECH
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