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S-doped surface-wrinkled carbon fiber loaded Co and MnO nanoparticles and preparation method and application thereof

A nanoparticle, carbon fiber technology, applied in fiber processing, fiber chemical characteristics, rayon manufacturing and other directions, can solve the problems of carrier corrosion performance, reduction, electrocatalytic performance and stability attenuation, etc., to improve catalytic performance, good electrochemical performance. Effects of stability, high electrocatalytic activity and stability

Active Publication Date: 2020-08-25
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Pt / C is used as a conventional commercial catalyst for ORR. Most of the supports are activated carbon. During the catalytic process, the support is easily corroded and the performance is reduced.
In addition, Pt is very easy to dissolve and agglomerate during the catalytic process, which eventually leads to the rapid decay of electrocatalytic performance and stability.

Method used

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  • S-doped surface-wrinkled carbon fiber loaded Co and MnO nanoparticles and preparation method and application thereof
  • S-doped surface-wrinkled carbon fiber loaded Co and MnO nanoparticles and preparation method and application thereof
  • S-doped surface-wrinkled carbon fiber loaded Co and MnO nanoparticles and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A preparation method of S-doped surface wrinkled carbon fiber loaded Co and MnO nanoparticles, comprising the following steps:

[0035] 1) Preparation of the spinning polymer precursor solution: Weigh 1.0 g of polyvinylpyrrolidone (PVP), add 13 mL of N,N-dimethylformamide (DMF): ethanol to a mixed solvent of 3:10, and fully stir 12h to make it dissolve; at the same time add 0.582gCo(NO 3 ) 2 ·6H 2 O, 0.245g Mn(Ac) 2 4H 2 O and 10 mg N 2 h 4 CS was stirred for 24h until uniform;

[0036] 2) Preparation of PVP nanofibers containing Co(II) and Mn(II): the dark red solution prepared in step 1) is loaded into the sample tube of the electrospinning instrument, and the needle aperture of the sample tube is 0.6mm. Fix the loaded electrospinning sample tube to receive electrospinning on a flat plate covered with aluminum foil. The working voltage of the electrospinning instrument is 20kV, the curing distance is 15cm, and the injection rate of the electrospinning solution...

Embodiment 2

[0039] Prepare S-doped surface wrinkled carbon fiber loaded Co and MnO nanoparticles according to the same method as in Example 1, the difference is that in this example step 1) Preparation of spinning polymer precursor solution: Weigh 0.5g polyvinylpyrrolidone (PVP), add 13mL N,N-dimethylformamide (DMF): ethanol in the mixed solvent of 3:10, fully stir for 12h to dissolve; add 0.582g Co(NO 3 ) 2 ·6H 2 O, 0.245g Mn(Ac) 2 4H 2 O and 10 mg N 2 h 4 CS was stirred for 24h until homogeneous.

Embodiment 3

[0041] Prepare S-doped surface wrinkled carbon fiber loaded Co and MnO nanoparticles according to the same method as in Example 1, the difference is that in this example step 1) Preparation of spinning polymer precursor solution: Weigh 1.0g of polyvinylpyrrolidone (PVP), add 13mL N,N-dimethylformamide (DMF): ethanol to the mixed solvent of 5:8, fully stir for 12h to make it dissolve; add 0.582g Co(NO 3 ) 2 ·6H 2 O, 0.245g Mn(Ac) 2 4H 2 O and 10 mg N 2 h 4 CS was stirred for 24h until homogeneous.

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Abstract

The invention provides S-doped surface-wrinkled carbon fiber loaded Co and MnO nanoparticles and a preparation method and application thereof. The preparation method comprises the following steps thatpolyvinylpyrrolidone is added into a mixed solvent of DMF and ethanol, cobalt nitrate, manganese acetate and thiourea (N2H4CS) are added after the polyvinylpyrrolidone is dissolved, after the mixtureis mixed to be uniform, and polymer fibers are obtained through electrostatic spinning; low-temperature pre-oxidation is carried out on the polymer fibers to obtain a precursor; and high-temperaturecalcination is carried out on the precursor to obtain the S-doped surface-wrinkled carbon fiber loaded Co and MnO nanoparticles. According to the S-doped surface-wrinkled carbon fiber loaded Co and MnO nanoparticles and the preparation method and application thereof, an S-doped surface-wrinkled carbon fiber loaded Co and MnO nanoparticle catalyst prepared by the invention has similar oxygen reduction electrocatalytic performance and better stability, is a zinc-air battery catalyst with great potential, and has a wide application prospect in the future energy industry.

Description

technical field [0001] The invention relates to S-doped surface wrinkled carbon fibers supporting Co and MnO nanoparticles, a preparation method and application thereof, and belongs to the technical field of zinc-air battery catalysts. Background technique [0002] Metal-air batteries are considered as a potential alternative for next-generation portable devices due to their high energy density, environmental friendliness, and low cost. At present, the main challenges for metal-air batteries in wide application are still low energy conversion efficiency and poor stability. These challenges are mainly caused by the slow multi-electron transfer processes of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Although noble metal electrocatalysts (Pt, Ru, Ir, and their alloys) are considered to be the best oxygen electrocatalysts, their poor bifunctional catalytic properties, low reserves, high cost, and poor stability hinder their large-scale commercial appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/21D01F1/10D01D5/00H01M4/90
CPCD01F9/21D01F1/10D01D5/003H01M4/9016H01M4/9041H01M4/9083Y02E60/50
Inventor 徐林周其兴艾丽李琦萱唐亚文孙冬梅
Owner NANJING NORMAL UNIVERSITY
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