Large-size MXene nanosheet rich in oxygen functional groups as well as preparation method and application thereof

An oxygen functional group and nanosheet technology is applied to large-sized, oxygen-rich MXene nanosheets and their preparation and application fields, which can solve the problems of small lateral size of MXene nanosheets and achieve good electrochemical performance and good stability. Effect
CN110615440AActive Publication Date: 2019-12-27HARBIN NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN NORMAL UNIVERSITY
Publication Date
2019-12-27

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Abstract

The invention discloses a large-size MXene nanosheet rich in oxygen functional groups as well as a preparation method and an application thereof, and relates to an MXene nanosheet as well as a preparation method and an application of the MXene nanosheet. The invention aims to solve the problem that the transverse size of the MXene nanosheet prepared by the existing method is small. The large-sizeMXene nanosheet being rich in oxygen functional groups is formed by stacking a plurality of few-layer MXene nanosheets. The preparation method comprises the following steps: 1, centrifuging a two-dimensional MXene nanosheet suspension to obtain a muddy precipitate; 2, adding deionized water into the muddy precipitate, stirring the slurry, freezing the slurry in an ultra-low temperature refrigerator at -80 DEG C, and finally freeze-drying in a freeze dryer to obtain a freeze-dried product; and 3, placing the freeze-dried product into a solvent for carrying out ultrasonic treatment. The invention discloses applications of the large-size MXene nanosheet as an electrode material of a supercapacitor or a lithium ion battery. According to the preparation method, the large-size MXene nanosheet rich in oxygen functional groups can be obtained.
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Description

technical field

[0001] The present invention relates to a kind of MXene nano sheet and its preparation method and application. Background technique

[0002] MXene is a novel two-dimensional graphene-like crystal material with a two-dimensional layered structure. It is stripped from the ternary layered compound MAX, where M represents the former transition group metal (Ti, Nb, Ta, V, Mo, Cr, Zr), A is mainly IIIA and IVA group elements, and X is carbon or nitrogen . The X atoms are located in the octahedral center of the closely arranged M layers, and the M layers and A layers are alternately arranged to form the MAX phase. The researchers used hydrofluoric acid to etch away the A layer, leaving the M n+1 x n layer. m n+1 x n A layer is a two-dimensional planar structure with a thickness of only a few atomic layers, and it is named MXene to emphasize its similar structure to graphene. MXene includes a large number of transition metal carbides and nitrides, and more th...

Claims

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