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Preparation method and application of iron-cobalt-loaded nitrogen-doped carbon fiber self-supporting membrane catalyst

A nitrogen-doped carbon fiber, self-supporting membrane technology, applied in fuel cell type half-cell and primary cell type half-cell, electrical components, battery electrodes, etc., can solve the problem of poor resistance to methanol poisoning, unstable structure, precious metal High cost and other problems, to achieve the effect of high stability and excellent performance

Active Publication Date: 2021-02-23
HEILONGJIANG UNIV
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  • Application Information

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Problems solved by technology

However, factors such as high cost, unstable structure, and poor resistance to methanol poisoning of noble metals severely limit their commercial applications.

Method used

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  • Preparation method and application of iron-cobalt-loaded nitrogen-doped carbon fiber self-supporting membrane catalyst
  • Preparation method and application of iron-cobalt-loaded nitrogen-doped carbon fiber self-supporting membrane catalyst
  • Preparation method and application of iron-cobalt-loaded nitrogen-doped carbon fiber self-supporting membrane catalyst

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Embodiment 1

[0027] Embodiment 1: the preparation method of a kind of iron-cobalt loaded nitrogen-doped carbon fiber self-supporting film catalyst in the present embodiment is carried out according to the following steps:

[0028] Step 1. Dissolve 1.2g of polyacrylonitrile in 10mL of DMF, then add 0.0996g of cobalt acetate, and stir until completely dissolved to obtain a shell solution;

[0029] Step 2. Dissolve 2.0 g of polyvinylpyrrolidone in 10 mL of DMF, then add 0.202 g of ferric nitrate, and stir until completely dissolved to obtain a nuclear layer solution;

[0030] Step 3. Inject the shell solution obtained in step 1 and the core layer solution obtained in step 2 into the two solution channels of the coaxial electrospinning device, adjust the coaxial electrospinning parameters for electrospinning, and the conditions for electrospinning For: the positive and negative voltage difference is 20kV; the receiving distance is 15cm; the spray rate of the nuclear layer solution is 0.007mL m...

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Abstract

The invention discloses a preparation method and application of an iron-cobalt-loaded nitrogen-doped carbon fiber self-supporting membrane catalyst. The invention belongs to the technical field of zinc-air battery electrode materials. The transition metal electrocatalyst which can replace commercial Pt / C and RuO2 and is of a three-dimensional net-shaped hollow structure is synthesized through a coaxial electrostatic spinning technology, and a zinc-air battery with the catalyst as a cathode has high power density and stability. The method comprises the following steps: mixing a transition metalprecursor with a carbon source solution to obtain a shell precursor solution and a core precursor solution respectively, obtaining a nanofiber precursor through a coaxial electrostatic spinning technology, and carrying out heat treatment after coordination. An electrode material prepared from the iron-cobalt-loaded nitrogen-doped carbon fiber self-supporting membrane provided by the invention hasexcellent oxygen electro-catalysis capability and power density. The initial potential of the oxygen reduction reaction is 0.96 V, and the potential of the oxygen evolution reaction under the condition of 10mA. Cm<-2> current density is 1.68 V; and the limit power density of the assembled zinc-air battery can reach 205mW. Cm <-2>.

Description

technical field [0001] The invention belongs to the technical field of electrode materials; in particular, it relates to an iron-cobalt-loaded self-supporting carbon nanofiber (Fe / Co-N-C) oxygen electrocatalyst and its preparation method and application. Background technique [0002] With the rapid development of society, people's demand for energy is also increasing. However, due to the constraints of primary energy reserves on the earth and its non-environmental protection, the development and utilization of efficient and clean secondary energy storage devices such as supercapacitors, fuel cells, metal-ion batteries, and metal-air batteries is extremely important. Precious metals (Pt) and their oxides (IrO 2 , RuO 2 ) has attracted extensive attention due to its excellent ORR and OER activities. However, factors such as high cost, unstable structure, and poor resistance to methanol poisoning of noble metals severely limit their commercial applications. Therefore, it is...

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Application Information

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IPC IPC(8): H01M4/90H01M12/06
CPCH01M4/9041H01M4/9083H01M12/06
Inventor 王蕾张旭宋玉宇张欣欣
Owner HEILONGJIANG UNIV
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