Method for preparing iron/copper aza graphene zinc air battery cathode catalyst

A zinc-air battery and cathode catalyst technology, which is applied in the field of electrocatalytic materials and achieves the effects of simple preparation method, reduced time and energy consumption, and easy availability of reaction conditions

Active Publication Date: 2019-09-17
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different from the traditional method of high-temperature calcination under inert gas, it is very important to combine these materials through an efficient synthesis method to prepare an electrocatalyst with high-efficiency oxygen reduction (ORR) activity.

Method used

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  • Method for preparing iron/copper aza graphene zinc air battery cathode catalyst
  • Method for preparing iron/copper aza graphene zinc air battery cathode catalyst
  • Method for preparing iron/copper aza graphene zinc air battery cathode catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Dissolve 1.1g of ferric chloride hexahydrate and 0.24g of sodium hydroxide in 20mL of deionized water, ultrasonically disperse evenly, transfer the mixed solution to a reaction kettle for hydrothermal reaction at 100°C for 4h, and cool to room temperature Afterwards, washing and drying obtains iron oxyhydroxide (FeOOH) precursor;

[0031] (2) Dissolve 0.23g of copper chloride dihydrate in 250mL of deionized water, add 200mg of polyethylene glycol, stir until dissolved, add 1.2mL of sodium hydroxide solution, stir at room temperature for half an hour, wash and dry , to get copper hydroxide (Cu(OH) 2 )Precursor;

[0032] (3) Put 4g of urea in a tube furnace and calcinate at 600°C for 6h under an argon atmosphere to obtain graphite phase carbon nitride g-C 3 N 4 ;

[0033] (4) Weigh 89mg of FeOOH and 97mg of Cu(OH) respectively 2 Dissolve in 10mL of deionized water, add it into 10mL of graphene oxide aqueous dispersion (2mg / mL) after ultrasonication for 30min, and...

Embodiment 2

[0037] (1) Dissolve 1.1g of ferric chloride hexahydrate and 0.24g of sodium hydroxide in 20mL of deionized water, ultrasonically disperse evenly, transfer the mixed solution to a reaction kettle for hydrothermal reaction at 100°C for 4h, and cool to room temperature Afterwards, washing and drying obtains iron oxyhydroxide (FeOOH) precursor;

[0038] (2) Dissolve 0.23g of copper chloride dihydrate in 250mL of deionized water, add 200mg of polyethylene glycol, stir until dissolved, add 1.2mL of sodium hydroxide solution, stir at room temperature for half an hour, wash and dry , to get copper hydroxide (Cu(OH) 2 )Precursor;

[0039] (3) Put 4g of urea in a tube furnace and calcinate at 600°C for 6h under an argon atmosphere to obtain graphite phase carbon nitride g-C 3 N 4 ;

[0040] (4) Weigh 89mg of FeOOH and 97mg of Cu(OH) respectively 2 Dissolve in 10mL of deionized water, add it into 10mL of graphene oxide aqueous dispersion (2mg / mL) after ultrasonication for 30min, and...

Embodiment 3

[0044] (1) Dissolve 1.1g of ferric chloride hexahydrate and 0.24g of sodium hydroxide in 20mL of deionized water, ultrasonically disperse evenly, transfer the mixed solution to a reaction kettle for hydrothermal reaction at 100°C for 4h, and cool to room temperature Afterwards, washing and drying obtains iron oxyhydroxide (FeOOH) precursor;

[0045] (2) Dissolve 0.23g of copper chloride dihydrate in 250mL of deionized water, add 200mg of polyethylene glycol, stir until dissolved, add 1.2mL of sodium hydroxide solution, stir at room temperature for half an hour, wash and dry , to get copper hydroxide (Cu(OH) 2 )Precursor;

[0046] (3) Put 4g of urea in a tube furnace and calcinate at 600°C for 6h under an argon atmosphere to obtain graphite phase carbon nitride g-C 3 N 4 ;

[0047] (4) Weigh 89mg of FeOOH and 97mg of Cu(OH) respectively 2 Dissolve in 10mL of deionized water, add it into 10mL of graphene oxide aqueous dispersion (2mg / mL) after ultrasonication for 30min, and...

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Abstract

The invention belongs to the field of zinc air batteries, and discloses a method for preparing an iron/copper aza graphene zinc air battery cathode catalyst, comprising the following steps of: (1) mixing iron oxyhydroxide, copper hydroxide, graphene oxide and graphite phase carbon nitride (g-C3N4), and adding sodium alginate to obtain a gel; (2) placing the gel into a quartz tube closed at one end, vacuumizing the quartz tube by a centrifugal pump, and calcining the quartz tube in a muffle furnace at 750 to 950 degrees centigrade for 10 to 20 minutes, and then cooling the quartz tube at room temperature; (3) immersing a black solid obtained in the previous step in a hydrochloric acid for 8 to 12 hours at 50 to 80 degrees centigrade, washing a product with deionized water and ethanol to neutral, drying the product, placing the dried black powders in the quartz tube closed at one end, vacuumizing the quartz tube, calcining the quartz tube at 750 to 850 degrees centigrade for 10 to 20 minutes, and cooling the product to obtain the iron/copper aza graphene. The method is convenient and efficient. The prepared catalyst is an amorphous structure, and has high electrocatalytic oxygen reduction activity and good stability, and has a very good application prospect.

Description

technical field [0001] The invention belongs to the field of electrocatalytic materials, and relates to a preparation method and application of an iron / copper azagraphene zinc-air battery cathode catalyst. Background technique [0002] With the rapid consumption of fossil energy and the increasingly serious problem of global warming, people have begun to vigorously study greener and cleaner energy conversion and energy storage equipment, such as electrolytic water splitting devices, fuel cells and metal-air batteries (S.Chu, Y. Cui, N. Liu, Nat Mater 2016, 16, 16-22.). Zinc-air batteries have received extensive attention in recent years because of their high energy density, low price, and no pollution (U.L. Dong, P. Xu, Z. P. Cano, A. G. Kashkooli, M. G. Park, Z. Chen, J. Mater .Chem.A, 2016, 4, 7107-7134.). The oxygen reduction (ORR) reaction that occurs at the cathode of a zinc-air battery determines the performance of the battery in practical use. Currently, platinum-o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M12/06
CPCH01M4/9041H01M4/90H01M12/06
Inventor 徐丽田玉辉李赫楠邓代洁
Owner JIANGSU UNIV
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