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Preparation method and application of self-supporting metal sulfide air electrode

A metal sulfide and air electrode technology, applied to battery electrodes, fuel cell half-cells, secondary battery-type half-cells, circuits, etc., can solve the problem of less metal sulfides, electrode side reactions, and reduced battery life and other issues to achieve low cost, improve performance, and avoid side effects

Pending Publication Date: 2020-09-11
泰州市海创新能源研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are very few studies on the preparation of metal sulfides and their application in lithium-air batteries
Moreover, the electrodes used in the existing lithium-air batteries usually need to use conductive agents and binders during preparation to ensure the conductivity of the electrode materials and bond them into shape, which will cause the electrodes to occur during the discharge process. Side effects, reducing battery life

Method used

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  • Preparation method and application of self-supporting metal sulfide air electrode
  • Preparation method and application of self-supporting metal sulfide air electrode
  • Preparation method and application of self-supporting metal sulfide air electrode

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preparation example Construction

[0024] The preparation method of the self-supporting metal sulfide air electrode of the present invention comprises the following steps: (a) dissolving soluble cobalt salt, soluble nickel salt and precipitant in water to form a mixed solution, and transferring it to a first hydrothermal reaction kettle; The molar ratio of the soluble cobalt salt, the soluble nickel salt and the precipitating agent is 1-3:1:3-5; (b) adding a current collector to the first hydrothermal reaction kettle so that the mixed solution is immersed in the The current collector; then heat the first hydrothermal reaction tank to carry out a hydrothermal reaction to grow a nickel-cobalt precursor on the surface of the current collector; (c) place the current collector grown with a nickel-cobalt precursor In the second hydrothermal reaction kettle filled with sulfide aqueous solution, it is heated to carry out hydrothermal reaction in it; (d) the current collector obtained in step (c) is placed in an inert ga...

Embodiment 1

[0029] The present embodiment provides a kind of preparation method of self-supporting metal sulfide air electrode, and it comprises the following steps:

[0030] (a) 2.5mmol cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O, AR), 1.25mmol nickel chloride hexahydrate (NiCl 2 ·6H 2 O, AR) and 4.5mmol urea (H 2 NCONH 2 , AR) dissolved in 35mL H 2 O, stirred to form a uniform pink solution, and the pink liquid was transferred to the first hydrothermal reaction kettle of 50mL;

[0031] (b) Add carbon paper with a diameter of 14mm (current collector, Toray TGP-H-O6O) into the first hydrothermal kettle, seal it and place it at 130°C for 6 hours of hydrothermal reaction; after the hydrothermal treatment, the surface of the carbon paper grows To produce a pink nickel-cobalt precursor, use deionized water and alcohol to alternately clean the carbon paper for 3 to 5 times, and then dry it in a blast drying oven at 60°C;

[0032] (c) Transfer the dried carbon paper with nickel-cobalt...

Embodiment 2

[0036] The present embodiment provides a kind of preparation method of self-supporting metal sulfide air electrode, and it comprises the following steps:

[0037] (a) 1.25mmol cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O, AR), 1.25mmol nickel chloride hexahydrate (NiCl 2 ·6H 2 O, AR) and 3.75mmol urea (H 2 NCONH 2 , AR) dissolved in 35mL H 2 O, stirred to form a uniform pink solution, and the pink liquid was transferred to the first hydrothermal reaction kettle of 50mL;

[0038] (b) Add carbon paper with a diameter of 14mm (current collector, Toray TGP-H-O6O) into the first hydrothermal kettle, seal it and place it at 100°C for 10 hours of hydrothermal reaction; after the hydrothermal treatment, the surface of the carbon paper grows To produce a pink nickel-cobalt precursor, use deionized water and alcohol to clean the carbon paper for 3 to 5 times, and then dry it in a blast drying oven at 100°C;

[0039] (c) Transfer the dried carbon paper with nickel-cobalt precu...

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Abstract

The invention relates to a preparation method of a self-supporting metal sulfide air electrode. The method comprises the following steps: (a), dissolving soluble cobalt salt, soluble nickel salt and aprecipitant in water to form a mixed solution, and transferring the mixed solution into a first hydrothermal reaction kettle; and setting the molar ratio of the soluble cobalt salt to the soluble nickel salt to the precipitant to be (1-3): 1: (3-5); (b), adding a current collector into the first hydrothermal reaction kettle to enable the current collector to be immersed in the mixed solution; then heating the first hydrothermal reaction kettle to carry out hydrothermal reaction in the first hydrothermal reaction kettle so as to grow a nickel-cobalt precursor on the surface of the current collector; (c), putting the current collector on which the nickel-cobalt precursor grows into a second hydrothermal reaction kettle containing a sulfide aqueous solution, and heating the second hydrothermal reaction kettle to carry out hydrothermal reaction in the second hydrothermal reaction kettle; and (d), placing the current collector obtained in the (c) in an inert gas atmosphere, and performingcalcining at a temperature of s300-500 DEG C. And a NiCo2S4 nanotube array with a hollow tube shape, a self-supporting structure and high conductivity can be formed on the current collector.

Description

technical field [0001] The invention belongs to the field of nanometer materials and relates to the preparation of a metal sulfide electrode, in particular to a preparation method and application of a self-supporting metal sulfide air electrode. Background technique [0002] Metal sulfides have received more and more attention and research because of their high electrical conductivity and excellent catalytic activity. They have been widely used in supercapacitors and lithium-ion batteries, and exhibit very high electrochemical performance. However, there are very few studies on the preparation of metal sulfides and their application in lithium-air batteries. Moreover, the electrodes used in the existing lithium-air batteries usually need to use conductive agents and binders during preparation to ensure the conductivity of the electrode materials and bond them into shape, which will cause the electrodes to occur during the discharge process. Side effects reduce battery life....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M12/08B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/90H01M12/08
Inventor 田景华王金杨瑞枝
Owner 泰州市海创新能源研究院有限公司
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