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Flexible composite electrode material and preparation method and application thereof

A composite electrode and flexible technology, which is applied in the field of flexible composite electrode materials and its preparation, can solve the problems of limited capacitance performance and low electronic conductivity of pure MoS2, and achieve the effect of improving capacity performance, low preparation cost, and good degradation

Pending Publication Date: 2022-03-08
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since pure MoS 2 The electronic conductivity is low, and its capacitive performance is still limited. Therefore, the present invention provides a flexible composite electrode material and its preparation method and application

Method used

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  • Flexible composite electrode material and preparation method and application thereof
  • Flexible composite electrode material and preparation method and application thereof
  • Flexible composite electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0043] This embodiment provides a method for preparing a flexible composite electrode material, comprising the following steps:

[0044] Soak the carbon cloth in nitric acid with a mass concentration of 65% for 12 hours to make the carbon cloth hydrophilic, then wash it alternately with ethanol and acetone for 3 times, and dry the cleaned carbon cloth in a vacuum oven at 60°C 8h, standby.

[0045] Take 0.29g sodium molybdate (1mmol) and 0.26g thiourea (3mmol), pour them into a polytetrafluoroethylene inner sleeve with a volume of 25mL, add deionized water to 60% of the total volume, and fully dissolve the solids. Add 0.025 g cobalt nitrate hexahydrate (0.086 mmol) and 0.025 g urea CH 4 N 2 O (0.42mmol), and it was ultrasonically mixed under 100W for 10min to make it evenly mixed, and then put into the pre-treated carbon cloth. Place the inner sleeve in the stainless steel outer sleeve and seal it. Heat to 200°C and keep warm for 24h.

[0046] After the reaction was complete...

Embodiment 2

[0048] This embodiment provides a method for preparing a flexible composite electrode material, comprising the following steps:

[0049] Soak the carbon cloth in nitric acid with a mass concentration of 60% for 12 hours to make the carbon cloth reach the hydrophilic effect, then wash it alternately with ethanol and acetone for 3 times, and dry the cleaned carbon cloth in a vacuum oven at 60°C 8h, standby.

[0050] Weigh potassium molybdate and thioacetamide respectively according to the molar ratio of 1:2, and take the corresponding volume of deionized water according to the dosage ratio of 10L deionized water per mole of potassium molybdate. The mol ratio of 1:1 takes by weighing the cobalt acetate of corresponding quality, and takes by weighing corresponding ammoniacal liquor according to the mol ratio of ammoniacal liquor and cobaltous acetate 0.4:1, for subsequent use.

[0051] Evenly disperse the weighed potassium molybdate and thioacetamide in deionized water, then add ...

Embodiment 3

[0054] This embodiment provides a method for preparing a flexible composite electrode material, comprising the following steps:

[0055] Soak the carbon cloth in nitric acid with a mass concentration of 60% for 12 hours to make the carbon cloth reach the hydrophilic effect, then wash it alternately with ethanol and acetone for 3 times, and dry the cleaned carbon cloth in a vacuum oven at 60°C 8h, standby.

[0056] Take by weighing ammonium molybdate tetrahydrate and L-cysteine ​​respectively according to the molar ratio of 1:2, and take the corresponding volume of deionized water according to the dosage ratio of 12L deionized water per mole of ammonium molybdate tetrahydrate. The molar ratio of cobalt chloride and ammonium molybdate tetrahydrate is 0.1:1, and the corresponding mass of cobalt chloride is weighed, and the corresponding melamine is weighed according to the molar ratio of melamine and cobalt acetate of 0.4, and set aside.

[0057] Disperse the weighed ammonium mo...

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Abstract

The invention belongs to the technical field of energy storage materials, and discloses a flexible composite electrode material and a preparation method and application thereof.The preparation method of the flexible composite electrode material comprises the following steps that molybdate and a sulfur source are evenly dispersed in a water solvent, then a cobalt source and a nitrogen source are added, ultrasonic treatment is conducted to enable the cobalt source and the nitrogen source to be evenly dispersed, and a mixed material is obtained; and then placing the pretreated carbon cloth in the mixed material, carrying out heat preservation at 190-220 DEG C for 20-36 hours, and after the reaction is finished, washing and drying to obtain the electrode composite material. The material is improved by doping N and Co elements, the pseudocapacitance of the supercapacitor can be effectively improved by doping the nitrogen element, more reaction active sites are provided under the synergistic effect of the nitrogen element and the cobalt element, the impedance and bursting performance of the material are effectively reduced, and the low capacity performance and cycle stability of MoS2 are improved.

Description

technical field [0001] The invention relates to the technical field of energy storage materials, in particular to a flexible composite electrode material and its preparation method and application. Background technique [0002] With the increasing sophistication of wearable device technology, the development of energy storage devices towards flexibility has been broadened. Due to its high power density and high cycle stability, flexible supercapacitors have shown great application prospects in the field of flexible energy storage. . However, at present, flexible supercapacitors have limited their development due to their inherent low energy and low rate performance, so they need to be improved. [0003] Transition metal dichalcogenides (TMDs) are typical "graphene-like" 2D materials, which exhibit excellent performance in electrocatalysis and electrical storage due to their unique structures. Among various inorganic two-dimensional materials as electrode materials, MoS wit...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/40H01G11/30H01G11/26B82Y40/00B82Y30/00
CPCH01G11/86H01G11/40H01G11/30H01G11/26B82Y30/00B82Y40/00Y02E60/10Y02E60/13H01G11/02H01G11/70H01G11/46
Inventor 李明贾文汉吴昊
Owner GUILIN UNIVERSITY OF TECHNOLOGY