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Modified Ppy-MXene composite material as well as preparation method and application thereof

A composite material and modified technology, used in the manufacture of hybrid/electric double layer capacitors, nanotechnology for materials and surface science, hybrid capacitor electrodes, etc., can solve the problem of narrow application temperature range, rate performance and cycle performance to be improved and other problems, to achieve the effect of eliminating self-priming of electrolyte, environmental protection and green preparation process, and simple and efficient preparation method.

Active Publication Date: 2021-06-22
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the inventors found that only combining conductive polymers with MXenes has problems such as narrow application temperature range, rate performance and cycle performance to be improved.

Method used

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  • Modified Ppy-MXene composite material as well as preparation method and application thereof
  • Modified Ppy-MXene composite material as well as preparation method and application thereof
  • Modified Ppy-MXene composite material as well as preparation method and application thereof

Examples

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preparation example Construction

[0041] Another embodiment of the present invention provides a method for preparing a modified Ppy-MXene composite material, the steps are as follows:

[0042] Add pyrrole to the MXene dispersion for polymerization to obtain Ppy-MXene composites;

[0043] Prepare the ionic liquid into an ionic liquid microemulsion in water;

[0044] The water-in-ionic liquid microemulsion was mixed with the solution of Ppy-MXene composite material, and the modified Ppy-MXene composite material was obtained by ultrasonic treatment.

[0045] In the present invention, pyrrole is added to the MXene dispersion liquid for polymerization reaction, so that the polypyrrole can modify the hybrid material constructed by MXenes nanosheets. Ultrasonic treatment can promote the adsorption of microemulsion particles to the surface of the hybrid nanosheets, so that the microemulsion particles can enter between the nanosheets.

[0046] In some examples of this embodiment, pyrrole is added dropwise to the MXen...

Embodiment approach

[0057] The third embodiment of the present invention provides an application of the above-mentioned modified Ppy-MXene composite material in the preparation of supercapacitor electrodes.

[0058] The fourth embodiment of the present invention provides a supercapacitor electrode, including an active material, and the active material is the above-mentioned modified Ppy-MXene composite material.

[0059] Specifically, the supercapacitor electrode is a membrane structure. The membrane structure can be prepared from the above-mentioned modified Ppy-MXene composite material.

[0060] A fifth embodiment of the present invention provides a supercapacitor, including the above supercapacitor electrode and an electrolyte, where the electrolyte is an ionic liquid.

[0061] In some embodiments, the ionic liquid is [EMim][TFSI] or [Eim][TFSI].

[0062] In order to enable those skilled in the art to understand the technical solution of the present invention more clearly, the technical solu...

Embodiment 1

[0064] First synthesis of exfoliated few-layer Ti 3 C 2 T x -MXene nanosheets, using a mixture of hydrochloric acid (HCl) and lithium fluoride (LiF) as etchant, and Ti 3 AlC 2 Raw materials, preparation of multilayer Ti 3 C 2 T x of the dispersion. In an ice-water bath, add 2g LiF to 40mL 9M HCl and stir for 30 minutes, then slowly add 2g Ti in 10 minutes 3 AlC 2 , etch at a constant temperature of 35°C for 24 hours; the multilayer Ti 3 C 2 T x Wash with deionized water, centrifuge until the supernatant pH ≈ 6, pour the supernatant to obtain a precipitate; the obtained multilayer Ti 3 C 2 T x Mixing with 80 mL deionized water to prepare exfoliated few-layer Ti 3 C 2 T x , sonicated for 1 h under Ar gas bubbling; centrifuged at 3500 rpm for 1 h to obtain exfoliated few-layer Ti 3 C 2 T x of black supernatant. Next, 0.1g pyrrole was added to 0.25ml isopropanol, 0.2g pyrrole was added to 0.5ml isopropanol, 0.4g pyrrole was added to 1.0ml isopropanol, and after...

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Abstract

The invention discloses a modified Ppy-MXene composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding pyrrole into an MXene dispersion liquid, and carrying out polymerization reaction to obtain the Ppy-MXene composite material, preparing the ionic liquid into an ionic liquid-in-water microemulsion; and mixing the ionic liquid-in-water microemulsion with the solution of the Ppy-MXene composite material, and carrying out ultrasonic treatment to obtain the modified Ppy-MXene composite material. The prepared composite material is easy and efficient to operate, raw materials are cheap and easy to obtain, complex equipment is not needed, and the composite material has excellent rate capability and cycle life in a wide temperature range.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials and relates to the preparation of supercapacitor electrode materials, in particular to a modified Ppy-MXene composite material and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the development of science and technology and the progress of society, various aspects including consumer electronics, transportation, industrial power consumption and grid energy storage have put forward higher demand for energy, but the global energy crisis and environmental problems are becoming more and more serious, so the development of clean , efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/48H01G11/24H01G11/86B82Y30/00B82Y40/00
CPCH01G11/30H01G11/48H01G11/24H01G11/86B82Y30/00B82Y40/00
Inventor 郝京诚范琪
Owner SHANDONG UNIV
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