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Preparation method and application of MXene/gold nanoparticle composite electrode material

A technology of gold nanoparticles and composite electrodes, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems that the performance of MXene electrode materials cannot be further improved, and the high conductivity and high specific surface area cannot be achieved simultaneously. Achieve the effect of improving electrochemical performance, good flexibility, and improving capacitance performance

Active Publication Date: 2020-07-03
UNIV OF SCI & TECH BEIJING
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  • Claims
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a preparation method and application of a MXene / gold nanoparticle composite electrode material with better superelectric performance, so as to solve the problem of high electrical conductivity and high specific surface area after MXene nanosheets are stacked into a film. The two cannot have both, which limits the problem that the performance of MXene electrode materials cannot be further improved

Method used

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  • Preparation method and application of MXene/gold nanoparticle composite electrode material
  • Preparation method and application of MXene/gold nanoparticle composite electrode material
  • Preparation method and application of MXene/gold nanoparticle composite electrode material

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preparation example Construction

[0034] see figure 1 , a method for preparing a MXene / gold nanoparticle composite electrode material provided by an embodiment of the present invention comprises the following steps:

[0035] Add LiF to 12M hydrochloric acid solution and stir until clarification to prepare corrosion solution;

[0036] Add Ti to the etchant 3 AlC 2 Powder, react with slight heat for 20-28h, then wash and centrifuge until the pH of the supernatant is greater than 6;

[0037] Disperse the precipitate obtained by centrifugation into deionized water for ultrasonic treatment, and then centrifuge the solution after ultrasonic treatment, and the obtained supernatant is the MXene colloidal solution;

[0038] Calculate the concentration of the MXene colloidal solution, add deoxygenated deionized water to obtain a MXene colloidal solution with a concentration of 0.5-2 mg / ml;

[0039] The preparation mass fraction is 1% chloroauric acid aqueous solution, and as required, the chloroauric acid aqueous so...

Embodiment 1

[0046] (1) Add 1g LiF into 20Ml 12M HCl solution, and use magnetic stirring for 20min to dissolve LiF in the HCl solution, and the mixed solution is clear without obvious particles.

[0047] (2) 1gTi 3 AlC 2 The powder is slowly added to the mixed solution in step (1), and the mixed solution is slowly stirred during the addition.

[0048] (3) The solution in step (2) was stirred by magnetic force for 10 min, and placed in a water bath at 35° C. for 24 h, with a rotation speed of 300 rpm.

[0049] (4) The reaction solution obtained in step (3) was centrifuged and washed at 3500 rpm for 3 minutes each time, and after 6-7 times, the pH of the supernatant was greater than 6, and the precipitate of the reactant was obtained.

[0050] (5) Disperse the precipitated reactant obtained in step (4) into 100 ml of deionized water, and blow in Ar gas for 30 min.

[0051] (6) Ultrasonicate the dispersion liquid in step (5) for 1 hour under aeration, and keep the water temperature not exc...

Embodiment 2

[0060] (1) Add 1g LiF into 20Ml 12M HCl solution, and use magnetic stirring for 20min to dissolve LiF in the HCl solution, and the mixed solution is clear without obvious particles.

[0061] (2) 1gTi 3 AlC 2 The powder is slowly added to the mixed solution in step (1), and the mixed solution is slowly stirred during the addition.

[0062] (3) The solution in step (2) was stirred by magnetic force for 10 min, and placed in a water bath at 35° C. for 24 h, with a rotation speed of 300 rpm.

[0063] (4) The reaction solution obtained in step (3) was centrifuged and washed at 3500 rpm for 3 minutes each time, and after 6-7 times, the pH of the supernatant was greater than 6, and the precipitate of the reactant was obtained.

[0064] (5) Disperse the precipitated reactant obtained in step (4) into 100 ml of deionized water, and blow in Ar gas for 30 min.

[0065] (6) Ultrasonicate the dispersion liquid in step (5) for 1 hour under aeration, and keep the water temperature not exc...

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Abstract

The invention provides a preparation method of an MXene / gold nanoparticle composite electrode material. The preparation method comprises the following steps: preparing a flaky MXene colloidal solutionwith a concentration of 0.5-2 mg / ml; preparing a chloroauric acid aqueous solution with a mass fraction of 0.1-1%; according to a mass ratio of chloroauric acid to MXene of 1:3:1-30, mixing the chloroauric acid aqueous solution and the MXene colloidal solution, and carrying out electromagnetic stirring for 10-60 min at a speed of 100-2000 rpm to obtain an MXene / gold nanoparticle composite material with gold nanoparticles with a particle size of 20-35 nm evenly deposited on the surface of an MXene sheet layer; and carrying out vacuum suction filtration on the MXene / gold nanoparticle compositematerial to prepare a flexible film, namely the MXene / gold nanoparticle composite electrode material. According to the preparation method of the MXene / gold nanoparticle composite electrode material provided by the invention, the prepared MXene / gold nanoparticle composite electrode material is high in electrochemical performance and good in flexibility.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic energy materials, in particular to a preparation method and application of an MXene / gold nanoparticle composite electrode material. Background technique [0002] As a new energy storage device between batteries and traditional capacitors, supercapacitors have attracted much attention because of their high power density, high charge and discharge efficiency, good cycle stability, and environmental protection. In recent years, with the rapid development of portable and wearable electronic devices, the potential application potential of flexible supercapacitors as energy storage devices has attracted great attention, and flexible electrode materials, as the core components of flexible supercapacitors, are the key to the development . [0003] In recent years, two-dimensional electrode materials, such as graphene, MXene, transition metal sulfide, black phosphorus, etc., have been exten...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/32
CPCH01G11/30H01G11/32H01G11/86
Inventor 候新梅武伟杨涛王恩会陈俊红李斌
Owner UNIV OF SCI & TECH BEIJING
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