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MXene/nitrogen-doped carbon foam composite material with 3D porous neuron-like structure and its preparation method

A technology of nitrogen-doped carbon and composite materials, which is applied in the preparation/purification of carbon, the manufacture of hybrid/electric double layer capacitors, titanium carbide, etc., and can solve the problems of unstable porous MXene structure, complex synthesis process, and ecological pollution. Achieve the effects of improving electrical properties, promoting penetration, and reducing capacitance loss

Active Publication Date: 2022-03-11
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, 3D macroporous MXene electrodes also have some problems. First, the structure of porous MXene is unstable and inelastic, and it is easily damaged under the action of external mechanical strain; second, its synthesis process is complicated and relatively expensive. Ecological pollution will also occur during the removal process

Method used

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  • MXene/nitrogen-doped carbon foam composite material with 3D porous neuron-like structure and its preparation method
  • MXene/nitrogen-doped carbon foam composite material with 3D porous neuron-like structure and its preparation method
  • MXene/nitrogen-doped carbon foam composite material with 3D porous neuron-like structure and its preparation method

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Embodiment 1

[0030] A kind of MXene / N doped carbon foam composite material of 3D porous neuron structure, its preparation method is as follows:

[0031] 1) Slowly dissolve 1.6g of lithium fluoride in 20mL of 9M hydrochloric acid solution, stir for 5min, and slowly add 1g of Ti 3 AlC 2 (10min), stirred at 45°C for 24h, then washed and centrifuged with deionized water at 3500rpm, centrifuged for 5min each time, centrifuged 6-8 times until the pH value of the supernatant was greater than 6, collected the precipitate, and added the precipitate to 100mL Ultrasonic dispersion in water for 3h under the protection of argon, centrifuge the resulting dispersion at 3500rpm for 1h, collect the supernatant to obtain MXene colloidal solution, the concentration is about 5mg mL -1 , add deionized water to the MXene colloidal dispersion, and ultrasonically disperse evenly to obtain a concentration of 2.5mgmL -1 MXene colloidal dispersion;

[0032] 2) Fully immerse melamine formaldehyde resin foam with a...

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Abstract

The invention relates to a MXene / nitrogen-doped carbon foam composite material with a 3D porous neuron-like structure and a preparation method thereof. The composite material uses a porous nitrogen-doped carbon foam as a skeleton, and the pores of the porous nitrogen-doped carbon foam In a neuron-like structure, MXene nanosheets are uniformly deposited on the surface of the skeleton and dispersed between the pores of the porous nitrogen-doped carbon foam. The MXene / nitrogen-doped carbon foam composite material provided by the present invention effectively prevents the stacking and aggregation of MXene nanosheets, and can provide more contact sites as an electrode material, promote the penetration of electrolytes, and provide for the transport of ions in the electrode. An effective channel is established to accelerate the transfer of ions, which can significantly improve the capacitance and rate performance. The assembled all-solid-state supercapacitor device has high compressibility and excellent cycle stability, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of electrode materials composed of or including active materials, and specifically relates to a 3D porous neuron-like structure MXene / nitrogen-doped carbon foam composite material and a preparation method thereof. Background technique [0002] MXene, as a class of two-dimensional layered transition metal carbides and carbonitrides, has the general formula M n+1 x n T x , where M is an early transition metal, X is carbon and / or nitrogen, and T x Termination for surface functions, such as -OH, -F, -O. It has excellent electrical conductivity (up to 10000S cm -1 as an independent film) and mechanical properties, abundant surface functional groups, high energy and high power density. Therefore, the abundant redox-active surface sites and conductive metal carbide and nitride cores of MXene can provide high capacitance, making it a promising electrode material for supercapacitors. However, similar to other 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/921C01B32/05H01G11/24H01G11/30H01G11/32H01G11/86
CPCC01B32/921C01B32/05H01G11/30H01G11/32H01G11/24H01G11/86C01P2004/80C01P2006/12C01P2006/14C01P2006/40C01P2004/03C01P2002/85Y02E60/13
Inventor 潘春旭孙立
Owner WUHAN UNIV
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