Nano-sheet TiS2/Ti3C2TX MXene/C composite material as well as preparation method and application thereof

A composite material, nanosheet technology, applied in nanocarbon, nanotechnology, nanotechnology and other directions, can solve the problems affecting the cycle stability and high rate performance of MXene materials, and achieve excellent electrochemical sodium storage performance, high sodium storage Capacity, the effect of reducing cycle performance degradation

Active Publication Date: 2022-05-27
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, two-dimensional MXene nanosheets are prone to stacking, which great

Method used

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  • Nano-sheet TiS2/Ti3C2TX MXene/C composite material as well as preparation method and application thereof
  • Nano-sheet TiS2/Ti3C2TX MXene/C composite material as well as preparation method and application thereof
  • Nano-sheet TiS2/Ti3C2TX MXene/C composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Disperse 2g LiF in 40mL HCl (9M) solution and stir for 30min to obtain a uniform and clear etching solution A;

[0028] (2) Weigh 2g Ti 3 AlC 2 The black powder was added to the etching solution A, under the heating condition of 45°C, the etching was stirred for 36 hours, and then centrifugally washed with deionized water for 5 times until the pH of the product was > 6, and a black clay-like precipitate B was obtained;

[0029] (3) Put the precipitate B in a 100mL beaker, then add 50mL of deionized water, perform ultrasonic stripping for 120min, centrifuge at 9000rpm for 30min, collect and take the upper black solution C;

[0030] (4) Take 15mL of the above solution C and place it in a 100mL beaker, add 35mL of deionized water, add 1.0g of dopamine hydrochloride, adjust the pH of the solution to 9 with ammonia water, stir for 12 hours, and centrifuge and wash at 4500rpm, and freeze-dry the precipitate to obtain gray powder D;

[0031] (5) Weigh 200 mg of the abov...

Embodiment 2

[0033] (1) Disperse 2g LiF in 40mL HCl (9M) solution and stir for 30min to obtain a uniform and clear etching solution A;

[0034] (2) Weigh 1g Ti 3 AlC 2 The black powder was added to the etching solution A, etched and stirred for 24 hours under the heating condition of 45°C, and then centrifuged and washed with deionized water for 5 times until the pH of the product was > 6, and a black clay-like precipitate B was obtained;

[0035] (3) Put the precipitate B in a 100mL beaker, then add 50mL of deionized water, perform ultrasonic stripping for 120min, centrifuge at 9000rpm for 30min, collect and take the upper black solution C;

[0036](4) Take 15mL of the above solution C and place it in a 100mL beaker, add 35ml of deionized water, add 1.0g of dopamine hydrochloride, adjust the pH of the solution to 9 with ammonia water, stir for 12h, and centrifuge and wash at 4500rpm, and freeze-dry the precipitate to obtain gray powder D;

[0037] (5) Weigh 200 mg of the above gray pow...

Embodiment 3

[0039] (1) Disperse 1g LiF in 20mL HCl (12M) solution and stir for 30min to obtain a uniform and clear etching solution A;

[0040] (2) Weigh 1g Ti 3 AlC 2 The black powder was added to the etching solution A, etched and stirred for 24 hours under the heating condition of 45°C, and then centrifuged and washed with deionized water for 5 times until the pH of the product was > 6, and a black clay-like precipitate B was obtained;

[0041] (3) Put the precipitate B in a 100mL beaker, then add 50mL of deionized water, perform ultrasonic stripping for 100min, centrifuge at 9000rpm for 30min, and collect the upper black solution C;

[0042] (4) Take 15mL of the above solution C and place it in a 100mL beaker, add 35mL of deionized water, add 1.0g of dopamine hydrochloride, adjust the pH of the solution to 9 with ammonia water, stir for 12 hours, and centrifuge and wash at 4500rpm, and freeze-dry the precipitate to obtain gray powder D;

[0043] (5) Weigh 200 mg of the above gray p...

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Abstract

The invention discloses a nanosheet-shaped TiS2/Ti3C2TX MXene/C composite material as well as a preparation method and application of the nanosheet-shaped TiS2/Ti3C2TX MXene/C composite material. According to the preparation method disclosed by the invention, a few layers of Ti < 3 > C < 2 > TX MXene coated with dopamine hydrochloride are subjected to local vulcanization, and the nano-sheet TiS < 2 >/Ti < 3 > C < 2 > TX MXene/C composite material is prepared. According to the preparation method disclosed by the invention, MXene is taken as a starting material, local vulcanization and derivation are carried out on the MXene to prepare the TiS2 nanosheet, and the derived and grown TiS2 can inhibit stacking of the MXene to a certain extent, so that the problem of cycle performance reduction caused by structural collapse is effectively reduced, and finally, excellent electrochemical sodium storage performance is shown; and particularly, when being used as a sodium-ion battery negative electrode material, the sodium-ion battery negative electrode material has relatively high sodium storage capacity and good cycle performance and rate capability.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials, in particular to nanosheet TiS 2 / Ti 3 C 2 T X MXene / C composites and their preparation methods and applications. Background technique [0002] MXene is a two-dimensional inorganic material of transition metal carbides or nitrides, consisting of several atomic layers of transition metal carbides, nitrides, or carbonitrides. It has an organ-like microscopic morphology, excellent physical and chemical properties, such as good electrical conductivity, high specific surface area, a large number of ion channels, etc., and has broad application prospects in the fields of electrochemical energy storage (such as sodium-ion batteries) . However, two-dimensional MXene nanosheets are prone to stacking, which greatly affects the cycle stability and high-rate performance of MXene materials. Contents of the invention [0003] The purpose of the present invention is to propose a nano-fl...

Claims

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Application Information

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IPC IPC(8): C01G23/00C01B32/921C01B32/15H01M4/36H01M4/58H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCC01G23/007C01B32/921C01B32/15H01M4/366H01M4/58H01M4/625H01M4/628H01M10/054B82Y30/00B82Y40/00C01P2004/80C01P2004/20C01P2004/03C01P2006/40Y02E60/10
Inventor 金俊肖托席文王欢文汪锐公衍生贺贝贝
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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