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Preparation method of flexible self-supporting mxene/cus supercapacitor electrode material

A technology for supercapacitors and electrode materials, which is applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, and hybrid capacitor electrolytes. It can solve problems such as poor cycle performance and reduced electrochemical performance, and achieve excellent flexibility and high specific capacity. , the effect of increasing the specific surface area

Active Publication Date: 2022-01-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its poor cycle performance leads to a greatly reduced electrochemical performance, thus limiting its further application in electrode materials to a large extent.

Method used

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  • Preparation method of flexible self-supporting mxene/cus supercapacitor electrode material
  • Preparation method of flexible self-supporting mxene/cus supercapacitor electrode material
  • Preparation method of flexible self-supporting mxene/cus supercapacitor electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Preparation and electrochemical performance of flexible self-supporting MXene supercapacitor electrode materials

[0051] Step 1: Preparation of accordion-shaped MXene: Etching Ti with LiF and HCl mixture 3 AlC 2 Preparation method, specifically: measure 2-15ml of concentrated hydrochloric acid and 1-10ml of deionized water, slowly add concentrated hydrochloric acid into a container with deionized water, then weigh 0.1-5g of LiF powder and add to the above-mentioned diluted In hydrochloric acid, after LiF is completely dissolved, add 0.1-3g MAX phase ceramic powder Ti 3 AlC 2 Add slowly. Put the container on a magnetic stirrer, adjust the temperature to 20-50° C., adjust the rotation speed to 100-300 r / min, and collect the product after reacting for 10-30 hours. After washing with concentrated hydrochloric acid for 5 to 10 times, the product was repeatedly washed with deionized water until the pH value was between 6 and 7, and finally a dark green MXene solution was...

Embodiment 2

[0058] Preparation and electrochemical performance of flexible self-supporting MXene / CuS-5 (CuS content is 5wt%) supercapacitor electrode material

[0059] Step 1: Preparation of accordion-shaped MXene: Etching Ti with LiF and HCl mixture 3 AlC 2 Preparation method, specifically: measure 2-15ml of concentrated hydrochloric acid and 1-10ml of deionized water, slowly add concentrated hydrochloric acid into a container with deionized water, then weigh 0.1-5g of LiF powder and add to the above-mentioned diluted In hydrochloric acid, after LiF is completely dissolved, add 0.1-3g MAX phase ceramic powder Ti 3 AlC 2 Add slowly. Put the container on a magnetic stirrer, adjust the temperature to 20-50° C., adjust the rotation speed to 100-300 r / min, and collect the product after reacting for 10-30 hours. After washing with concentrated hydrochloric acid for 5 to 10 times, the product was repeatedly washed with deionized water until the pH value was between 6 and 7, and finally a da...

Embodiment 3

[0067] Preparation and electrochemical performance of flexible self-supporting MXene / CuS-15 (CuS content is 15wt%) supercapacitor electrode material

[0068] Step 1: Preparation of accordion-shaped MXene: Etching Ti with LiF and HCl mixture 3 AlC 2Preparation method, specifically: measure 2-15ml of concentrated hydrochloric acid and 1-10ml of deionized water, slowly add concentrated hydrochloric acid into a container with deionized water, then weigh 0.1-5g of LiF powder and add to the above-mentioned diluted In hydrochloric acid, after LiF is completely dissolved, add 0.1-3g MAX phase ceramic powder Ti 3 AlC 2 Add slowly. Put the container on a magnetic stirrer, adjust the temperature to 20-50° C., adjust the rotation speed to 100-300 r / min, and collect the product after reacting for 10-30 hours. After washing with concentrated hydrochloric acid for 5 to 10 times, the product was repeatedly washed with deionized water until the pH value was between 6 and 7, and finally a d...

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Abstract

The invention relates to a preparation method of a flexible self-supporting MXene / CuS supercapacitor electrode material. A large number of single-layer or few-layer two-dimensional MXene (Ti 3 C 2 ); using a one-step hydrothermal method to prepare nano-flower-like material CuS; then prepare a sandwich-structured MXene / CuS conductive film electrode material by layer-by-layer self-assembly (LBL, layer-by-layer) suction filtration method; use polyvinyl alcohol and sulfuric acid as the The gel electrolyte was prepared from the raw materials, and the MXene / CuS conductive film was used as the electrode material to form a flexible self-supporting symmetric supercapacitor with a solid electrolyte. The operation process of the present invention is controllable and the process is simple. The prepared flexible self-supporting supercapacitor electrode material has the characteristics of environmental friendliness, high specific capacity, excellent flexibility, etc., and does not require conductive agents and adhesives, greatly reducing costs, and can be used in energy storage. and other fields have good application potential.

Description

technical field [0001] The invention belongs to the field of nano energy materials, and relates to a preparation method of a flexible self-supporting MXene / CuS supercapacitor electrode material. Background technique [0002] With the rapid development of science and technology, wearable electronic products (smart sports equipment, electronic skin, flexible screen, etc.) life brings convenience. In order to realize the industrialization of wearable electronic products, its energy storage devices also need to be highly flexible, so flexible supercapacitors are increasingly showing their high market value. However, due to the small size of wearable electronic products, the capacity of the corresponding energy storage devices cannot be guaranteed. Therefore, the energy storage devices of wearable electronic products must not only ensure high flexibility, but also ensure their capacity. Therefore, developing flexible supercapacitor electrode materials with high flexibility and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/84H01G11/24H01G11/26H01G11/30H01G11/56B82Y40/00G01N27/22G01R27/26
CPCH01G11/86H01G11/84H01G11/24H01G11/26H01G11/30H01G11/56B82Y40/00G01N27/22G01R27/2605Y02E60/13
Inventor 党阿磊孙弋婷刘鑫李铁虎赵廷凯李昊艾艳玲
Owner NORTHWESTERN POLYTECHNICAL UNIV