Nano-flower array flexible air electrode material and preparation method and application thereof

A technology of air electrodes and nanoflowers, applied in the field of electrodes, can solve the problems of low conductivity limiting electrochemical performance, and achieve good cycle stability, good cycle performance, and excellent electrochemical performance.

Inactive Publication Date: 2018-08-14
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their low electrical conductivity limits their electrochemical performance

Method used

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  • Nano-flower array flexible air electrode material and preparation method and application thereof
  • Nano-flower array flexible air electrode material and preparation method and application thereof
  • Nano-flower array flexible air electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Carbon cloth pretreatment:

[0029] The hydrothermal reaction time is 12 to 12.5 hours.

[0030] The commercial carbon cloth was ultrasonically cleaned with acetone, ethanol and deionized water for 30 min, and dried for use.

[0031] 2) f-CoNi 2 S 4 / CP synthesis: 2mmol nickel acetate, 1mmol cobalt acetate, and 8mmol sodium sulfide were added to 60ml deionized water and stirred for 1h to form a uniform mixed solution, then the mixed solution and carbon cloth (CP) were transferred to a 100ml autoclave, Reaction at 180°C for 12h. After the hydrothermal reaction, the CP was taken out at room temperature, washed several times with ethanol and deionized water, and then dried to obtain the CoNi 2 S 4 The CP of the nanoflower array (i.e. f-CoNi 2 S 4 / CP).

[0032] Obtain f-CoNi by embodiment 1 2 S 4 / CP looks like figure 1 , 2 as shown, image 3 for its BET graph, Figure 4 Its XRD figure. First charge and discharge performance: with f-CoNi 2 S 4 / CP catho...

Embodiment 2

[0034] 1) Carbon cloth pretreatment:

[0035] The commercial carbon cloth was ultrasonically cleaned with acetone, ethanol and deionized water for 30 min, and dried for use.

[0036] 2) f-CoNi 2 S 4 / CP synthesis: 2mmol nickel acetate, 1mmol cobalt acetate, and 8mmol sodium sulfide were added to 60ml deionized water and stirred for 1h to form a uniform mixed solution, then the mixed solution and carbon cloth (CP) were transferred to a 100ml autoclave, Reaction at 200°C for 12.5h. After the hydrothermal reaction, the CP was taken out at room temperature, washed several times with ethanol and deionized water, and then dried to obtain the CoNi 2 S 4 The CP of nanoflower arrays (i.e. f-CoNi 2 S 4 / CP).

[0037] Since the products produced in Example 1 and Example 2 of the present invention all contain carbon cloth, they can be effectively applied in other flexible and wearable power sources.

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Abstract

The invention discloses a preparation method of a nano-flower array flexible air electrode material. The preparation method comprises the steps of adding nickel acetate, cobalt acetate and sodium sulfide into deionized water for stirring to form a uniform mixed solution; performing hydrothermal reaction on the mixed solution and a carbon fabric; and cooling to a room temperature and taking out a product after reaction is ended, and obtaining CP grown with a CoNi2S4 nano-flower array. The nano-flower array flexible air electrode material has excellent mechanical strength stability and excellentelectrochemical performance including high return efficiency, favorable rate property and cycle stability.

Description

technical field [0001] The invention relates to the field of electrodes, in particular to a nanoflower array flexible air electrode material and a preparation method and application thereof. Background technique [0002] Flexible electronics have grown in popularity in recent years because they can be bent, twisted, rolled or stretched to a certain degree and still maintain their functionality. At this stage, relatively complete flexible energy storage devices have become the main bottleneck in the research field. Lithium-ion batteries (LIBs) have recently been considered as the first choice in flexible power sources, but the low theoretical energy density of currently commercialized Li-ion batteries inherently limits their application in next-generation flexible devices. Fortunately, rechargeable lithium-oxygen (Li-O 2 ) battery due to its extremely high theoretical energy density (about 3600Wh·kg -1 ), has become one of the most promising electrochemical energy storage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M12/08B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/8657H01M4/8825H01M4/885H01M4/9083H01M12/08Y02E60/10
Inventor 龙剑平胡安俊舒朝著陈建中刘云菡
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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