Preparation method and application of antimony nanoparticle/nitrogen-doped carbon nano necklace composite material (Sb/N-CNN)

A nanoparticle, nitrogen-doped carbon technology, applied in the direction of electrical components, electrochemical generators, battery electrodes, etc., can solve problems such as limited effects, and achieve high electrical conductivity, excellent rate performance, and fast electrochemical reaction rates.

Inactive Publication Date: 2019-03-15
JILIN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the effect of using one of the methods alone is still limited, so the present invention contemplates combining the above strategies to prepare a composite material that can be used for the negative electrode of a sodium ion battery

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  • Preparation method and application of antimony nanoparticle/nitrogen-doped carbon nano necklace composite material (Sb/N-CNN)

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Embodiment

[0054] The preparation process and steps in this embodiment are as follows:

[0055] (1) Preparation of ZIF-67: 1.487g Co(NO 3 ) 2 ·6H 2 O was dissolved in 100ml of methanol, 3.284g of 2-methylimidazole was dissolved in 50ml of methanol, and the two solutions were mixed and stirred for 2h, the product was centrifuged, washed with methanol and water for 3 times, and vacuum-dried at 70°C for 12h;

[0056] (2) Spinning ZIF-67 and PAN to prepare ZIF-67 / PAN-nanochains by electrospinning: take 0.263g ZIF-67 and ultrasonically disperse it in 2.063g of N,N-dimethylformamide, add 0.175 g polyacrylonitrile, stirred at room temperature for 24 hours, and then spun, the voltage was 18kV, the needle type was No. 19, the distance between the needle and the receiver was 18cm, and the ambient temperature was 35°C;

[0057] (3) The prepared ZIF-67 / PAN-nano chains were heated in a tube furnace with 5% H 2 In / Ar atmosphere, first anneal at 250°C for 1.5h, then raise the temperature to 700°C ...

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Abstract

The invention relates to a preparation method of an antimony nanoparticle/nitrogen-doped carbon nano necklace composite material (Sb/N-CNN), and an application thereof serving as a negative electrodematerial of a sodium ion battery. The preparation steps of the composite material are as follows: a, preparing ZIF-67; b, preparing a ZIF-67/PAN- nano chain by electrospinning of ZIF-67 and polyacrylonitrile (PAN); c, annealing the ZIF-67/PAN- nano chain in a 5% H2/Ar atmosphere to obtain a cobalt/nitrogen-doped carbon nano necklace (Co/N-CNN); d, performing a replacement reaction on the preparedCo/N-CNN and SbCl3 in a hydrothermal environment, and then performing annealing in an Ar atmosphere to obtain a Sb/N-CNN composite material. Serving as the negative electrode material of the sodium ion battery, the Sb/N-CNN has a capacity of 579 mAh g-1 after being circulated for 100 circles at the current density of 0.1 A g-1, the Sb/N-CNN has a capacity of 401 mAh g-1 after being circulated for6000 circles at the current density of 1 A g-1, and the Sb/N-CNN has a capacity of 314 mAh g-1 at the current density of 20 A g-1. The invention provides a new idea for the development of electrode materials of high-performance sodium ion batteries.

Description

Technical field: [0001] The invention relates to a preparation method of an antimony nanoparticle / nitrogen-doped carbon nano-necklace composite material (Sb / N-CNN) and its application as a negative electrode material of a sodium ion battery. Background technique: [0002] Clean and efficient energy storage devices play a vital role in combating global warming and energy crisis. At present, lithium-ion batteries have been used in many fields, especially in electric vehicles, because of their high energy density and power density. However, the limited and uneven distribution of global lithium resources has become a bottleneck for the development of low-cost large-scale energy storage lithium-ion batteries. Sodium-ion batteries work on a similar principle to lithium-ion batteries. At the same time, compared with lithium-ion batteries, it has the advantages of abundant resources, low cost, and environmental friendliness, so it has received extensive attention. Due to the larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/36
CPCH01M4/364H01M4/38H01M4/625H01M10/36Y02E60/10
Inventor 杨春成荆文涛张莹文子赵明蒋青
Owner JILIN UNIV
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