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Ti-C@CoMn-LDH composite material as well as preparation method and application thereof

A ti-c and hydrothermal reaction technology, applied in the field of nanomaterials, can solve the problems of active site and channel coverage, weak interlayer charge transfer, large interlayer spacing, etc., to accelerate ion diffusion and electron transfer, The effect of good cycle stability and high specific capacitance

Pending Publication Date: 2020-09-25
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a Ti-C@CoMn-LDH composite material and its preparation method and application in order to solve the above problems. The combination of wires and two-dimensional nanosheets to construct a three-dimensional porous structure solves the problem of weak interlayer charge transfer caused by large interlayer spacing and the coverage and blockage of active sites and channels.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of Ti 3 C 2 The preparation method and application of @CoMn-LDH composite material, including the following steps:

[0031] S1: Soak 0.1g LiF in 20mL 9M HCl solution, then gradually add Ti 3 AlC 2 The powder was stirred at a constant temperature of 35° C. for 24 hours, and the black sediment was washed by centrifugation with deionized water until pH = 6. The resulting Ti 3 C 2 T x powder in N 2 Repeat the sonication under protection, and centrifuge to collect the detached MXene suspension (e-Ti 3 C 2 ).

[0032] S2: 0.08g e-MXene, 2mmol Co(NO 3 ) 2 ·6H 2 O, 2mmol Mn(NO 3 ) 3 9H 2 O. Add 5mmol of ammonium fluoride to 80mL of deionized water and stir well. Add 18 mL of 1M ammonia water dropwise to the mixed solution, stir at room temperature for 2 h, then transfer the mixture to an autoclave for hydrothermal reaction, the hydrothermal reaction temperature is 180 ° C, and the hydrothermal time is 8 h. After cooling to room temperature, use Wash with...

Embodiment 2

[0035] A kind of Ti 3 C 2 The preparation method and application of @CoMn-LDH composite material, including the following steps:

[0036] S1: Soak 0.3g LiF in 20mL 9M HCl solution, then gradually add Ti 3 AlC 2 The powder was stirred at a constant temperature of 35° C. for 24 hours, and the black sediment was washed by centrifugation with deionized water until pH = 6. The resulting Ti 3 C 2 T x powder in N 2 Repeat the sonication under protection, and centrifuge to collect the detached MXene suspension (e-Ti 3 C 2 ).

[0037] S2: 0.08g e-MXene, 2mmol Co(NO 3 ) 2 ·6H 2 O, 2mmol Mn(NO 3 ) 3 9H 2 O. Add 5mmol of ammonium fluoride to 80mL of deionized water and stir well. Add 18 mL of 1M ammonia water dropwise to the mixed solution, stir at room temperature for 2 h, then transfer the mixture to an autoclave for hydrothermal reaction, the hydrothermal reaction temperature is 180 ° C, and the hydrothermal time is 8 h. After cooling to room temperature, use Wash with...

Embodiment 3

[0040] A kind of Ti 3 C 2 The preparation method and application of @CoMn-LDH composite material, including the following steps:

[0041] S1: Soak 0.1g LiF in 20mL 9M HCl solution, then gradually add Ti 3 AlC 2 After stirring the powder at a constant temperature of 45°C for 24 hours, the black sediment was washed by centrifugation with deionized water until pH=6. The resulting Ti 3 C 2 T x powder in N 2 Repeat the sonication under protection, and centrifuge to collect the detached MXene suspension (e-Ti 3 C 2 ).

[0042] S2: 0.08g e-MXene, 2mmol Co(NO 3 ) 2 ·6H 2 O, 2mmol Mn(NO 3 ) 3 9H 2 O. Add 5mmol of ammonium fluoride to 80mL of deionized water and stir well. Add 18 mL of 1M ammonia water dropwise to the mixed solution, stir at room temperature for 2 h, then transfer the mixture to an autoclave for hydrothermal reaction, the hydrothermal reaction temperature is 180 ° C, and the hydrothermal time is 8 h. After cooling to room temperature, use Wash with deio...

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PUM

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Abstract

The invention relates to a preparation method of a Ti-C@CoMn-LDH material, which comprises the following steps: S1: soaking LiF in an HCl solution, gradually adding Ti3AlC2 powder, stirring the components at constant temperature, and centrifugally washing black deposits with deionized water until the pH value is equal to 6 to obtain Ti3C2Tx powder; S2, performing ultrasonic treatment and centrifugation on the Ti3C2Tx powder under the protection of N2, and collecting and drying the centrifuged solid particles to obtain e-Ti3C2; S3, adding the e-Ti3C2, Co(NO3)2.6H2O, Mn(NO3)3.9H2O and NH4F intowater, uniformly dispersing the components, gradually adding ammonia water, transferring the liquid into a reaction kettle, carrying out hydrothermal reaction, and cooling, washing and drying a reaction product to obtain the Ti-C@CoMn-LDH material. Compared with the prior art, the Ti-C@CoMn-LDH composite material prepared by the method has a unique layered structure, accumulation of two-dimensional nanosheets can be effectively inhibited, effective active sites are provided, and diffusion of electrolyte and transfer of electrons can be promoted by high porosity of three-dimensional interconnection morphology.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a Ti-C@CoMn-LDH composite material and a preparation method and application thereof. Background technique [0002] Supercapacitors have the advantages of high charge-discharge rate, good stability, wide temperature range, long cycle time, and environmental friendliness, and have broad application prospects in the field of energy storage. Electrode materials play an important role in the assembly of high-performance supercapacitors. Two-dimensional materials (2D) are ideal candidates for supercapacitor electrodes, including layered double hydroxides (LDHs), transition metal carbide / nitride carbonitrides (MXene), and graphene, among others. [0003] The layered structure provides a unique nanoscale reaction space for chemical reactions. The exfoliated 2D nanosheets have a large specific surface area and a large number of active sites. Nanolayered materials provide a new st...

Claims

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Application Information

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IPC IPC(8): C01G51/00C01B32/921B82Y40/00B82Y30/00H01G11/24H01G11/30H01G11/86
CPCC01G51/00C01B32/921B82Y40/00B82Y30/00H01G11/24H01G11/30H01G11/86C01P2002/22C01P2004/80C01P2006/40
Inventor 韩生胡晓敏刘顺昌王露露丛海山蒋继波孙瑶馨陈宇凯
Owner SHANGHAI INSTITUTE OF TECHNOLOGY