A kind of ag-cuo-nrgo air electrode with super capacitor performance and preparation method

An air electrode and supercapacitor technology, applied to battery electrodes, fuel cell half-cells, primary battery half-cells, electrical components, etc., can solve the problems of easy falling off of the catalyst layer and low efficiency of zinc-air batteries, and achieve Effect of improving charge-discharge cycle efficiency

Active Publication Date: 2021-07-09
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to avoid the deficiencies of the prior art, the present invention proposes a Ag-CuO-NrGO air electrode with supercapacitive performance and a preparation method to solve the problems of low efficiency of zinc-air batteries and easy falling off of the catalyst layer

Method used

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  • A kind of ag-cuo-nrgo air electrode with super capacitor performance and preparation method
  • A kind of ag-cuo-nrgo air electrode with super capacitor performance and preparation method
  • A kind of ag-cuo-nrgo air electrode with super capacitor performance and preparation method

Examples

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Embodiment 1

[0034] This example is a CuO-NrGO catalyst layer supported by nickel foam, wherein the ratio of CuO and NrGO is 16:84. Mix 13 mL of graphene oxide and 27 mL of deionized water and stir for 1 hour, put in an oil bath and stir for 10 minutes, then add 5 mL of NH 3 ·H 2 O, stir and keep the temperature at 80°C for 24 hours. Centrifuge and wash multiple times with deionized water to remove remaining NH 3 ·H 2 O, the resulting product is nitrogen-doped reduced graphene oxide NrGO (the NrGO catalyst can be obtained by freeze-drying it). Afterwards, it was dispersed in deionized water and ultrasonicated for 30 minutes to obtain a uniformly dispersed suspension. 1.6 mL of 0.1M CuCl 2 The aqueous solution was added dropwise to the NrGO suspension and stirred for 10 minutes, then 6 mL of 0.1 M KOH was added dropwise and stirred for 1 hour. The suspension was centrifuged and washed with deionized water several times, followed by freeze-drying to obtain the CuO-NrGO catalyst. Put t...

Embodiment 2

[0036] This example is an air electrode prepared by foaming nickel to support an Ag-CuO-NrGO catalyst layer, wherein the ratio of Ag-CuO to NrGO is 9:91. Mix 13 mL of graphene oxide and 27 mL of deionized water and stir for 1 hour, put in an oil bath and stir for 10 minutes, then add 5 mL of NH 3 ·H 2 O, stir and keep the temperature at 80°C for 24 hours. Centrifuge and wash multiple times with deionized water to remove remaining NH 3 ·H 2 O, the resulting product is nitrogen-doped reduced graphene oxide NrGO (the NrGO catalyst can be obtained by freeze-drying it). Afterwards, it was dispersed in deionized water and ultrasonicated for 30 minutes to obtain a uniformly dispersed suspension. 1.6mL of 0.05M AgNO 3 -Cu(NO 3 ) 2 The aqueous solution was added dropwise to the NrGO suspension and stirred for 10 minutes, then 6 mL of 0.1 M KOH was added dropwise and stirred for 1 hour. The Ag-CuO-NrGO catalyst was obtained by centrifuging the suspension and washing it several t...

Embodiment 3

[0040] This example is an air electrode prepared by foaming nickel to support an Ag-CuO-NrGO catalyst layer, wherein the ratio of Ag-CuO to NrGO is 16:84. Mix 13 mL of graphene oxide and 27 mL of deionized water and stir for 1 hour, put in an oil bath and stir for 10 minutes, then add 5 mL of NH 3 ·H 2 O, stir and keep the temperature at 80°C for 24 hours. Centrifuge and wash multiple times with deionized water to remove remaining NH 3 ·H 2 O, the resulting product is nitrogen-doped reduced graphene oxide NrGO (the NrGO catalyst can be obtained by freeze-drying it). Afterwards, it was dispersed in deionized water and ultrasonicated for 30 minutes to obtain a uniformly dispersed suspension. 1.6mL of 0.1M AgNO 3 -Cu(NO 3 ) 2 The aqueous solution was added dropwise to the NrGO suspension and stirred for 10 minutes, then 6 mL of 0.1 M KOH was added dropwise and stirred for 1 hour. The Ag-CuO-NrGO catalyst was obtained by centrifuging the suspension and washing it several t...

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Abstract

The invention relates to an Ag-CuO-NrGO air electrode with supercapacitive performance and a preparation method thereof, which is prepared by directly growing nitrogen-doped reduced graphene oxide (NrGO), silver and copper oxide on a foamed nickel current collector. A novel binder-free silver / copper oxide-supported nitrogen-doped graphene catalytic layer with oxygen reduction catalytic activity is developed, and the resulting air electrode has supercapacitive properties, thus combining capacitive properties and oxygen reduction catalytic activity Together, the charge-discharge cycle efficiency of the zinc-air battery is comprehensively improved.

Description

technical field [0001] The invention belongs to the field of metal-air batteries and fuel batteries, and relates to an Ag-CuO-NrGO air electrode with supercapacitive performance and a preparation method. Background technique [0002] Zn-air batteries have become one of the most promising alternatives to lithium-ion batteries due to their high energy density, low cost, and environmental friendliness. However, zinc-air batteries have two problems in practical applications. One is the low conversion efficiency during charging and discharging. The general charging and discharging efficiency is 60%, which is lower than that of lithium-ion batteries (95%). The second is that the catalyst shedding during the air electrode cycle leads to the instability of the Zn-air battery. [0003] In order to solve the problem of low efficiency of zinc-air batteries, Glenn G. Amatucci et al. (Journal of The Electrochemical Society.2001, 148, A930-939) combined a high power density capacitor sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90H01M12/06
CPCH01M4/8605H01M4/88H01M4/8807H01M4/8896H01M4/9016H01M4/9075H01M12/065
Inventor 陈福义邱传洲汤泉
Owner NORTHWESTERN POLYTECHNICAL UNIV
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