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A kind of preparation method and application of iron/copper azagraphene zinc-air battery cathode catalyst

A zinc-air battery and cathode catalyst technology, applied in the field of electrocatalytic materials, to achieve the effect of rich content, strong controllability, and excellent electrocatalytic oxygen reduction

Active Publication Date: 2022-07-22
JIANGSU UNIV
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  • Summary
  • 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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  • A kind of preparation method and application of iron/copper azagraphene zinc-air battery cathode catalyst
  • A kind of preparation method and application of iron/copper azagraphene zinc-air battery cathode catalyst
  • A kind of preparation method and application of iron/copper azagraphene zinc-air battery cathode catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Dissolve 1.1g of ferric trichloride hexahydrate and 0.24g of sodium hydroxide in 20mL of deionized water, ultrasonicate until uniformly dispersed, transfer the mixed solution to a reactor for 4h hydrothermal reaction at 100°C, and cool to room temperature After, washing and drying to obtain iron oxyhydroxide (FeOOH) precursor;

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

[0032] (3) 4g of urea was placed in a tube furnace, and calcined at 600°C for 6h in an argon atmosphere to obtain graphitic carbon nitride g-C 3 N 4 ;

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

Embodiment 2

[0037] (1) Dissolve 1.1g of ferric trichloride hexahydrate and 0.24g of sodium hydroxide in 20mL of deionized water, ultrasonicate until uniformly dispersed, transfer the mixed solution to a reactor for 4h hydrothermal reaction at 100°C, and cool to room temperature After, washing and drying to obtain iron oxyhydroxide (FeOOH) precursor;

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

[0039] (3) 4g of urea was placed in a tube furnace, and calcined at 600°C for 6h in an argon atmosphere to obtain graphitic carbon nitride g-C 3 N 4 ;

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

Embodiment 3

[0044] (1) Dissolve 1.1g of ferric trichloride hexahydrate and 0.24g of sodium hydroxide in 20mL of deionized water, ultrasonicate until uniformly dispersed, transfer the mixed solution to a reactor for 4h hydrothermal reaction at 100°C, and cool to room temperature After, washing and drying to obtain iron oxyhydroxide (FeOOH) precursor;

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

[0046] (3) 4g of urea was placed in a tube furnace, and calcined at 600°C for 6h in an argon atmosphere to obtain graphitic carbon nitride g-C 3 N 4 ;

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

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Abstract

The invention belongs to the field of zinc-air batteries, and discloses a preparation method of an iron / copper azagraphene zinc-air battery cathode catalyst, comprising the following steps: (1) mixing iron oxyhydroxide, copper hydroxide with graphene oxide and graphite phase Carbon Nitride (g‑C 3 N 4 ) mixing, adding sodium alginate to obtain gel; (2) putting the above-mentioned gel into a quartz tube with one end closed, after vacuuming with a centrifugal pump, putting the quartz tube into a muffle furnace at 750-950 ° C for calcination 10-20min, then cooled at room temperature; (3) immerse the black solid obtained in the previous step in hydrochloric acid for 8-12h and keep at 50-80°C, then wash with deionized water and ethanol to neutrality and then dry, after drying The black powder was placed in a quartz tube closed at one end, calcined at 750-850 ℃ for 10-20min after vacuuming, and cooled to obtain iron / copper azagraphene. The method is convenient and efficient, and the prepared catalyst has an amorphous structure, and has high electrocatalytic oxygen reduction activity and good stability, and has very high application prospects.

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 research greener and cleaner energy conversion and energy storage devices, such as electric 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 due to 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-carbon (Pt / C) cata...

Claims

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Application Information

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Patent Type & Authority Patents(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