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A kind of 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 cells and primary cell type half cells, structural parts, electrical components, etc., can solve the problem of high cost of precious metals, poor resistance to methanol poisoning, structural instability, etc.

Active Publication Date: 2021-09-14
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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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  • A kind of preparation method and application of iron-cobalt loaded nitrogen-doped carbon fiber self-supporting membrane catalyst
  • A kind of preparation method and application of iron-cobalt loaded nitrogen-doped carbon fiber self-supporting membrane catalyst
  • A kind of 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; it belongs to the technical field of zinc-air battery electrode materials. The present invention synthesizes an alternative to commercial Pt / C and RuO through coaxial electrospinning technology 2 A transition metal electrocatalyst with a three-dimensional network hollow structure, and a zinc-air battery using the catalyst as a cathode has high power density and stability. The method of the invention comprises: mixing the transition metal precursor and the carbon source solution to obtain shell and core precursor solutions respectively, obtaining the nanofiber precursor through coaxial electrospinning technology, and heat-treating after coordination. The electrode material prepared by using the iron-cobalt-loaded nitrogen-doped carbon fiber self-supporting membrane provided by the invention has excellent oxygen electrocatalytic ability and power density. The onset potential of the oxygen reduction reaction is 0.96V, and the oxygen evolution reaction is at 10mA cm ‑2 The potential under the condition of current density is 1.68V; 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...

Claims

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Application Information

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