High volumetric specific capacitance flexibility molybdenum sulfide gel film electrode materials and preparation method thereof

A technology of molybdenum sulfide gel and thin-film electrodes, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, and can solve problems such as poor capacitance performance and difficult problems

Inactive Publication Date: 2017-06-06
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to relevant literature reports, the metal molybdenum sulfide thin film attached to the polyimide plastic substrate prepared by the thin film transfer method showed excellent volume specific capacitance in the aqueous electrolyte by the three-electrode test method (Nature Nanotechnology, 2015 ,10:313-318), but unfortunately, after the molybdenum sulfide film is used as an electrode to assemble a capacitor, its capacitance performance deteriorates rapidly. Specific capacitance performance is a major challenge

Method used

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  • High volumetric specific capacitance flexibility molybdenum sulfide gel film electrode materials and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] (1) Take the molybdenum sulfide powder in the 2H configuration, put it into an argon-protected round bottom flask, slowly add n-butyllithium hexane solution at a molar ratio of 1:2, and magnetically stir and reflux at 80°C for 48 hours to achieve For the lithium intercalation reaction of molybdenum sulfide, the resulting reaction product was washed with n-hexane several times, and dried in vacuum at a temperature of 40°C for 2 hours;

[0027] (2) Take the product of step (1), add deionized water and stir to prepare a 2 mg / mL molybdenum sulfide dispersion, and use an ultrasonic cell pulverizer at a power of 80W to peel and crush for 15 minutes;

[0028] (3) Centrifuging the molybdenum sulfide dispersion liquid through peeling and crushing at a speed of 6000 rpm for 30 minutes multiple times to obtain a uniform metallic molybdenum sulfide dispersion liquid;

[0029] (4) select the mixed cellulose filter membrane that aperture is 50nm for use, adopt the method suction filt...

Embodiment 2

[0034] (1) Take molybdenum sulfide powder in 2H configuration, put it into an argon-protected round bottom flask, slowly add n-butyllithium hexane solution at a molar ratio of 1:1, and magnetically stir and reflux at 70°C for 40 hours to achieve For the lithium intercalation reaction of molybdenum sulfide, the resulting reaction product was washed several times with n-hexane, and dried in vacuum at a temperature of 25°C for 3 hours;

[0035] (2) Take the product of step (1), add deionized water and stir to prepare a 1 mg / mL molybdenum sulfide dispersion, and use an ultrasonic cell pulverizer at a power of 60W to peel and crush for 5 minutes;

[0036] (3) Centrifuging the molybdenum sulfide dispersion liquid at a rate of 5000 rpm for several times for 20 minutes through stripping and crushing to obtain a uniform metallic molybdenum sulfide dispersion liquid;

[0037] (4) select the mixed cellulose filter membrane that aperture is 25nm for use, adopt the method suction filtratio...

Embodiment 3

[0041] (1) Take molybdenum sulfide powder in 2H configuration, put it into an argon-protected round bottom flask, slowly add n-butyllithium hexane solution at a ratio of 1:3 in molar ratio, and magnetically stir and reflux at 80°C for 50 hours to achieve For the lithium intercalation reaction of molybdenum sulfide, the resulting reaction product was washed several times with n-hexane, and dried in vacuum at a temperature of 50°C for 1 hour;

[0042] (2) Take the product of step (1), add deionized water and stir to prepare a 3mg / mL molybdenum sulfide dispersion, and use an ultrasonic cell pulverizer at a power of 120W to peel and crush for 20 minutes;

[0043] (3) Centrifuging the molybdenum sulfide dispersion liquid through peeling and crushing at a speed of 8000 rpm for 40 minutes multiple times to obtain a uniform metallic molybdenum sulfide dispersion liquid;

[0044] (4) select the mixed cellulose filter membrane that aperture is 220nm for use, adopt the method suction fil...

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Abstract

The present invention relates to a high volumetric specific capacitance flexibility molybdenum sulfide gel film electrode materials and a preparation method thereof. The concrete steps of the method comprise: (1) mixing molybdenum sulfide powder and n-butyllithium normal hexane solution to perform a lithium intercalation reaction, wherein the reaction products are cleaned by employing normal hexane; (2) adding deionized water into the products, configuring the molybdenum sulfide dispersion liquid, and performing peeling fragmentation processing by employing an ultrasonic wave cell disruptor; (3) performing centrifugation of the molybdenum sulfide dispersion liquid with peeling fragmentation, and obtaining a metallicity molybdenum sulfide dispersion liquid; (4) employing a mixed cellulose filter film to perform vacuum filtration of the metallicity molybdenum sulfide dispersion liquid; and (6) putting molybdenum sulfide gel attached to the mixed cellulose filter film into the ionic liquid aqueous solution for replacement, and obtaining the product after vacuum drying. Compared with the prior art, the prepared molybdenum sulfide gel film electrode materials has high volumetric specific capacitance are taken as a supercapacitor electrode to display the good volumetric specific capacitance.

Description

technical field [0001] The invention relates to the field of electrochemical energy storage materials, in particular to a flexible molybdenum sulfide gel film electrode material with high volume specific capacity and a preparation method thereof. Background technique [0002] As a green and environmentally friendly secondary energy device, high-performance supercapacitors can be widely used in mobile electronic equipment, vehicles, renewable energy production, aerospace and other fields, and excellent electrode materials are the key to realizing high performance of supercapacitors. Compared with the traditional preparation of high-quality specific capacitance electrode materials, electrode materials that can obtain high volume ratio capacitance are more suitable for practical applications. On the one hand, high volume ratio capacitance electrodes can reduce the amount of electrolyte, which is conducive to reducing production costs; On the one hand, it can realize the filling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30
CPCY02E60/13H01G11/86H01G11/30
Inventor 杨晓伟刘聪聪王戈周怡
Owner TONGJI UNIV
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