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MXene/ZnMnNi LDH Van der Waals heterostructure, preparation method and application thereof

A heterogeneous structure and reaction technology, applied in the field of electrochemical energy storage, can solve problems such as low conductivity, easy stacking, and affecting electrochemical performance, and achieve improved mass specific capacitance, good application, improved actual specific capacitance and cycle stability sexual effect

Active Publication Date: 2020-08-28
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the low conductivity and easy stacking of the above-mentioned LDHs as supercapacitor electrode materials will affect its actual electrochemical performance, the present invention provides a MXene / ZnMnNi LDH van der Waals heterostructure and its preparation method and application. A A new two-dimensional conductive material-MXene, forming F-MXene / F-ZnMnNi LDH composite electrode material by electrostatic self-assembly method

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  • MXene/ZnMnNi LDH Van der Waals heterostructure, preparation method and application thereof
  • MXene/ZnMnNi LDH Van der Waals heterostructure, preparation method and application thereof
  • MXene/ZnMnNi LDH Van der Waals heterostructure, preparation method and application thereof

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Embodiment Construction

[0053] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0054] Three specific examples of preparing MXene / ZnMnNi LDH van der Waals heterostructures are given below:

[0055] Step 1: Preparation of ZnMnNi LDH nanosheets (F-ZnMnNi LDH)

[0056] First, mix 0.01mol / L zinc nitrate hexahydrate, 0.03mol / L nickel nitrate hexahydrate, 0.01mol / L manganese acetate hexahydrate, 0.02mol / L hexamethylenetetramine and 20mL deionized water in a beaker ; Then, the above-mentioned mixed solution was transferred to a high-pressure reactor, and hydrothermally reacted at 90 ° C for 8 hours; after the reaction was completed, it was naturally cooled to room temperature, and washed with deionized water and absolute ethanol; then the obtained The precursor ZnMnNi LDH was transferred to the formamide solution and sonicated for 2 hours with a power of 300w; finally, the supernatant was collected at a centrifugation speed of 3...

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Abstract

The invention relates to an MXene / ZnMnNi LDH Van der Waals heterostructure, a preparation method and application thereof. The preparation method comprises: 1, preparing a single-layer ZnMnNi LDH nanosheet (F-ZnMnNi LDH); 2, preparing a single-layer MXene nanosheet (F-MXene); and 3, alternately stacking the F-ZnMnNi LDH and the F-MXene to form the F-MXene / F-ZnMnNi LDH Van der Waals heterostructure.The application comprises an electrode prepared by using the F-MXene / F-ZnMnNi LDH Van der Waals heterostructure, and a super capacitor prepared from the electrode. The F-MXene / F-ZnMnNi LDH Van der Waals heterostructure shows excellent electrochemical performance, the actual specific capacitance and the cycling stability of an electrode material are improved, and the F-MXene / F-ZnMnNi LDH Van der Waals heterostructure has good application in the field of supercapacitors.

Description

technical field [0001] The invention relates to an MXene / ZnMnNi LDH van der Waals heterostructure and a preparation method and application thereof, belonging to the technical field of electrochemical energy storage. Background technique [0002] As a new type of energy storage device, supercapacitors are stronger than batteries in terms of power density, and at the same time, have higher energy density than traditional capacitors. In addition, supercapacitors also have the advantages of long service life, high charge and discharge efficiency, and environmental friendliness, making them widely used in fields such as aerospace, electronic communications, and energy and chemical industries. [0003] The composition and structure of electrode materials are key factors determining the performance of supercapacitors. LDHs have become one of the widely studied pseudocapacitive materials due to their high theoretical specific capacitance, low cost and adjustable interlayer structur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/30H01G11/86
CPCH01G11/26H01G11/30H01G11/86Y02E60/13
Inventor 谈玲华孙超戴玉明朱力苗琪张立伟
Owner NANJING UNIV OF SCI & TECH
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