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Preparation and application of novel MXene modified porous carbon fiber composite electrode

A porous carbon fiber and composite electrode technology, which is applied in the fields of fiber chemical characteristics, rayon manufacturing, water/sludge/sewage treatment, etc., can solve the problems of dispersibility, poor formability, mechanical properties, desalination performance to be improved, and large energy consumption. question

Inactive Publication Date: 2021-06-22
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has disadvantages such as poor dispersibility, formability, and poor mechanical properties in scientific research and practical application. Performance could be improved

Method used

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  • Preparation and application of novel MXene modified porous carbon fiber composite electrode
  • Preparation and application of novel MXene modified porous carbon fiber composite electrode
  • Preparation and application of novel MXene modified porous carbon fiber composite electrode

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Embodiment

[0033] The preparation method of the novel MXene-modified porous carbon fiber composite electrode of the present embodiment comprises the steps:

[0034] (1) Slowly dissolve 1gLiF in 20mL of hydrochloric acid with a concentration of 9mol / L, stir for 30min, and slowly add 1gTi 3 AlC 2 , Stirring at 40°C for 24h. Then centrifugally wash with deionized water for 6 to 8 times, then centrifugally wash with DMF for no less than 5 times, collect the precipitate, and dissolve it in 50 mL of DMF;

[0035] (2) Take the DMF solution of 5mLMXene in a 10mL beaker, then put it into a 250mL beaker filled with smoothies and process it with an ultrasonic cell pulverizer. The total processing time is 20 minutes;

[0036] (3) Add 0.9g PAN (molecular weight: 150,000) to the above 5mL single-layer MXene / DMF mixed solution, and stir at room temperature for 12h to obtain the spinning precursor solution;

[0037] (4) Inject the spinning solution into a 5mL syringe, select a No. 22 stainless steel...

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Abstract

The invention provides preparation and application of a novel MXene modified porous carbon fiber composite electrode. The preparation method comprises the steps of carrying out etching treatment on an MAX phase, and obtaining two-dimensional layered MXene; enabling mXene to be centrifuged, washed and dissolved in an organic solvent DMF for ultrasonic stripping layering, and obtaining an organic solution of a single-layer MXene nanosheet; adding PAN into a MXene / DMF mixed solution, and fully mixing and stirring to obtain a spinning precursor solution; injecting the spinning solution into an electrostatic spinning device, and performing electrostatic spinning to obtain an MXene / PAN nanofiber membrane; and performing pre-oxidation and carbonization on the composite nanofiber membrane to obtain an electrode material capable of being used for desalination. An MXene / PAN film provided by the invention simultaneously has double electrode layers of a carbon material and a pseudocapacitance desalination mechanism of a Faraday electrode material, is high in desalination speed and high in desalination capacity, and can be widely applied to the fields of seawater desalination, industrial wastewater treatment and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental material synthesis, and in particular relates to the preparation and application of a novel MXene-modified porous carbon fiber composite electrode. Background technique [0002] MXene is a new type of two-dimensional nanomaterial composed of transition metal carbides, nitrides or carbonitrides, which has excellent performance in electrochemical energy storage materials. However, it has disadvantages such as poor dispersion, formability, and poor mechanical properties in scientific research and practical application. Performance could be improved. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the primary purpose of the present invention is to provide a novel MXene-modified porous carbon fiber composite electrode. [0004] The second object of the present invention is to provide the preparation method of the above-mentioned novel MXene-modified porous carb...

Claims

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Application Information

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IPC IPC(8): D01F9/22D01F1/10C02F1/469
CPCC02F1/4691D01F1/10D01F9/22
Inventor 马杰雷晶晶
Owner TONGJI UNIV
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