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Preparation method of potassium ion miniature hybrid capacitor and electrode material

A technology for hybrid capacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors. It can solve the problems of limited raw material resources, poor rate performance, and low conductivity of lithium-ion energy storage devices. Extremely poor chemical properties, improve electrical conductivity, and solve the effect of low electrical conductivity

Active Publication Date: 2021-08-31
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a potassium ion micro-hybrid capacitor and its preparation method and electrode material for the problem of limited raw material resources of lithium ion energy storage devices in the current technology
The electrode material is a multi-dimensional topological structure material in which part of potassium titanate grows between graphite layers; in the preparation method, potassium hydroxide is used as the potassium source and nano-titanium dioxide is used as the titanium source. Hydrothermal compounding at high temperature, the obtained material effectively solves the problems of low conductivity, low capacity and poor rate performance of potassium titanate materials

Method used

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  • Preparation method of potassium ion miniature hybrid capacitor and electrode material
  • Preparation method of potassium ion miniature hybrid capacitor and electrode material
  • Preparation method of potassium ion miniature hybrid capacitor and electrode material

Examples

Experimental program
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Embodiment 1

[0039] Step 1: Add 1600mg of lithium fluoride to 10ml (12M) dilute hydrochloric acid and stir for 5 minutes, then add 1000mg of Ti with a particle size of 300 molybdenum 3 ALC 2 powder, stirred at 35°C for 24h to Ti 3 ALC 2 The AL layer in the powder was etched away, and then it was centrifuged and washed with deionized water at a speed of 3500r / min until the pH was about 7, and then the centrifuged precipitate was dissolved in 60mL of deionized water, and the ice bath was ultrasonicated for 60min. Centrifuge the sonicated solution at a speed of 3500r / min for 5min, and then take out the supernatant liquid, which is the monolayer MXene solution.

[0040] Add 20.16g of potassium hydroxide to the dispersed MXene solution, stir at room temperature for 36h (basify the single-layer MXene at room temperature), and then centrifuge at a speed of 4500r / min to pH = 7 to remove potassium hydroxide , and then add a certain amount of deionized water to the centrifugal precipitation to ob...

Embodiment 2

[0061] The difference between Example 2 and Example 1 lies in the amount of positive and negative active material solutions used in the interdigital electrodes, which are 60 μL of the prepared positive electrode mixture and 90 μL of the prepared negative electrode mixture.

Embodiment 3

[0063] The difference between Example 3 and Example 1 is that the amount of positive and negative active material solutions used in the interdigital electrodes is different, and the usage amount is 40 μL of the prepared positive electrode mixture and 60 μL of the prepared negative electrode mixture.

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Abstract

The invention relates to a preparation method of a potassium ion micro hybrid capacitor and an electrode material. The method comprises the steps: spraying an active material on polyethylene glycol terephthalate (PET) by using a gas spray gun under the assistance of a mold, and constructing a micro flexible interdigital electrode with a multidirectional ion transmission channel on a PET transparent flexible substrate; drying the electrode in vacuum, coating the microporous polymer electrolyte on the surface of the electrode, finally putting the electrode into a vacuum bag, dropwise adding electrolyte, and performing packaging to obtain the flexible potassium ion micro hybrid capacitor. The electrode material is a multi-dimensional topological structure material in which part of potassium titanate grows between graphite layers; in the preparation method, potassium hydroxide is used as a potassium source, nano titanium dioxide is used as a titanium source, and the potassium source and the titanium source are subjected to hydrothermal compounding with flake graphite at the temperature of 100-250 DEG C. The material obtained by the invention effectively solves the problems of low conductivity, low capacity and poor rate capability of a potassium titanate material.

Description

technical field [0001] The patent of the invention belongs to the field of high specific energy supercapacitors, and specifically relates to an electrode material of a potassium ion micro-hybrid capacitor and its preparation method and application. Background technique [0002] With the continuous development of society, people's functional requirements for electronic products are also constantly improving, and electronic products have also ushered in a period of rapid development. For example, smart phones, tablet computers, intelligent robots, electronic watches and various wearable devices are constantly developing towards the trend of miniaturization and flexibility. But these self-powered electronic products, which tend to be miniaturized and flexible gradually, also face the problem of power supply. Therefore, electrochemical energy storage devices of various scales have become the key power sources for miniaturized and flexible smart and integrated electronic product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/50H01G11/32H01G11/86
CPCH01G11/50H01G11/32H01G11/86Y02E60/13
Inventor 王恭凯白瑞军张昕
Owner HEBEI UNIV OF TECH