Cobalt/nitrogen-codoped nitrogen-carbon-material-carrier-carried nano nickel iron nitride composite material, and preparation method and application thereof

A nickel-iron nitride, composite material technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as unfavorable active site exposure, achieve excellent bifunctional characteristics, good charge transfer, and improve the effect of easy agglomeration

Active Publication Date: 2017-06-23
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is easy to agglomerate during the synthesis process, which is not conducive to the full exposure of the active site

Method used

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  • Cobalt/nitrogen-codoped nitrogen-carbon-material-carrier-carried nano nickel iron nitride composite material, and preparation method and application thereof
  • Cobalt/nitrogen-codoped nitrogen-carbon-material-carrier-carried nano nickel iron nitride composite material, and preparation method and application thereof
  • Cobalt/nitrogen-codoped nitrogen-carbon-material-carrier-carried nano nickel iron nitride composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] The cobalt-nitrogen co-doped carbon material in the present invention, that is, Co, N-CNF (Co, N, C molar ratio is 2:5:90), the preparation method adopts the literature L.Shang, H.Yu, X.Huang ,T.Bian,R.Shi,Y.Zhao,G.I.N.Waterhouse,L.Z.Wu,C.H.Tung,T.Zhang,Well-Dispersed ZIF-Derived Co,N-Co-doped Carbon Nanoframethrough Mesoporous-Silica-Protected Calcination as Efficient Oxygen The method recorded in ReductionElectrocatalysts Adv.Mater.2016,28,1668, the specific steps are as follows:

[0045] a) 10.8mmol of Co(NO 3 ) 2 ·6H 2 O and 54mmol of Zn(NO 3 ) 2 ·6H 2 O was dissolved in 1000 mL methanol to obtain solution A.

[0046] b) 270mmol dimethylimidazole was dissolved in 800mL methanol to obtain solution B.

[0047] c) Pour solution B into solution A, stir at room temperature, then stir at room temperature for 2 hours, wash with methanol, and centrifuge to obtain a zinc-cobalt-doped zeolite imidazolate framework material.

[0048] d) Dissolve all the Zn and Co-ZIF i...

Embodiment 1

[0051] A nano-nickel-iron nitride composite material supported by a cobalt-nitrogen co-doped nitrogen-carbon material carrier, the preparation steps are as follows:

[0052] 1) Preparation of nano-nickel iron hydrotalcite composite material NiFe-LDH / Co,N-CNF supported by cobalt-nitrogen co-doped carbon material Co,N-CNF carrier:

[0053] Take 25mg of Co,N-CNF (molar ratio of Co,N,C: 2:5:90) in 20mL of dimethylpyrrolidone ultrasonic dispersion for 30 minutes, add 50mL containing 367.5mg Ni(NO 3 ) 2 ·6H 2 O,170mg Fe(NO 3 ) 3 9H 2 The aqueous solution of O and 9g urea was stirred and reacted at 100°C for 6h, washed with water and ethanol, centrifuged and dried in an oven at 60°C to obtain NiFe-LDH / Co,N-CNF.

[0054] 2) Nitrogen-carbon material Co doped with cobalt and nitrogen, and nano-nickel-iron nitride composite material Ni supported by N-NCNF carrier 3 Preparation of FeN / Co,N-NCNF:

[0055] Calcinate the NiFe-LDH / Co,N-CNF obtained in step 1) at 400°C for 2 hours in an...

Embodiment 2～5

[0060] A nano-nickel-iron nitride composite material supported by a cobalt-nitrogen co-doped nitrogen-carbon material carrier, the preparation steps are the same as in Example 1, the only difference is:

[0061] The calcination temperatures in step 2) are 450°C, 550°C, 600°C, and 700°C, respectively.

[0062] get Ni 3 FeN / Co, N-NCNF composites, the dimensions are shown in Table 1.

[0063] Table 1 Ni prepared under different calcination temperatures 3 Dimensions of FeN / Co,N-NCNF composites

[0064]

[0065] It can be seen from Table 1 that in the range of calcination temperature of 400-700°C, the size of nickel-iron nitride nanoparticles loaded on cobalt-nitrogen co-doped nitrogen-carbon material carrier increases with the increase of calcination temperature. Ni cannot be obtained when the temperature is too low or too high 3 FeN / Co, N-NCNF composites.

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Abstract

The invention discloses a cobalt/nitrogen-codoped nitrogen-carbon-material-carrier-carried nano nickel iron nitride composite material. The composite material uses a cobalt/nitrogen-codoped nitrogen carbon material as the carrier, and iron nickel nitride nanoparticles are carried in situ on the surface of the cobalt/nitrogen-codoped carbon material. The preparation method comprises the following steps: protecting a zeolite imidazate framework structure material precursor by using silicon dioxide to obtain the high-dispersity carbon-base nanoparticle material, and growing nickel iron hydrotalcite in situ on the carbon material, and calcining to obtain the cobalt/nitrogen-codoped nitrogen-carbon-material-carrier-carried nano nickel iron nitride composite material. The cobalt/nitrogen-codoped nitrogen-carbon-material-carrier-carried nano nickel iron nitride composite material has excellent activity in catalyzing oxygen redox reaction, and can be used as a high-efficiency zinc-air battery negative pole material.

Description

technical field [0001] The invention relates to the field of new energy technology. More specifically, it relates to a cobalt-nitrogen co-doped nitrogen-carbon material carrier-supported nano-nickel-iron nitride composite material and its preparation method and application. Background technique [0002] Zinc-air batteries, due to their low cost, environmental protection, and high specific energy density (1084Wh kg -1 ), is expected to become a new generation of energy. Currently hindering its further widespread application is the low efficiency of the anode materials used in zinc-air batteries to catalyze oxygen oxidation (OER) and reduction reactions (ORR). They are the catalysts with the highest activity for ORR and OER respectively, but they are expensive and scarce in reserves, which limit their use in batches. Although researchers have found that some non-noble metal materials can be used instead of noble metals, such as the ORR activity of nitrogen-doped carbon mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/90H01M4/96H01M4/88
CPCH01M4/362H01M4/88H01M4/90H01M4/96Y02E60/10Y02E60/50
Inventor 张铁锐王青尚露佟振合吴骊珠
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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