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Synthesis method of cobalt-molybdenum bimetallic sulfide for supercapacitor electrode material

A technology for supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors. It can solve unsatisfactory problems and achieve the effects of improving specific capacitance, good electrochemical performance, and high reversibility

Inactive Publication Date: 2020-02-28
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrode materials prepared by the above two are still not very ideal when applied to supercapacitors, so it is necessary to develop a new metal sulfide preparation process to obtain supercapacitor electrode materials with better performance

Method used

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  • Synthesis method of cobalt-molybdenum bimetallic sulfide for supercapacitor electrode material
  • Synthesis method of cobalt-molybdenum bimetallic sulfide for supercapacitor electrode material
  • Synthesis method of cobalt-molybdenum bimetallic sulfide for supercapacitor electrode material

Examples

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Effect test

preparation example 1

[0038] In the synthetic method of the cobalt-molybdenum bimetallic sulfide that is used for the supercapacitor electrode material of this example, at first, cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) and deionized water are mixed and dissolved in a ratio of 0.002:1 to obtain solution A, and then the morphology regulator ammonium fluoride, sodium tetrathiomolybdate (Na 2 MoS 4 ) and deionized water were mixed and dissolved according to the mass ratio of 0.001:0.002:1 to obtain solution B. Then, mix solution A and solution B in equal volumes and carry out hydrothermal reaction. The reaction temperature is 100°C and the reaction time is 6 hours. Under the conditions of 0.8KPa and 60°C, vacuum drying was carried out for 10 hours to obtain cobalt-molybdenum bimetallic sulfides.

[0039] The cobalt-molybdenum bimetallic sulfide synthesized by this preparation example, after testing its XRD pattern is as follows figure 1Shown in (test conditions are Bruker D8 and BDX3300 X-ray ...

preparation example 2

[0044] In the synthetic method of the cobalt-molybdenum bimetallic sulfide that is used for supercapacitor electrode material of this example, at first, cobalt nitrate (Co(NO 3 ) 2 ) and deionized water are mixed and dissolved at a ratio of 0.003:1 to obtain solution A, and then the morphology regulator sodium lauryl sulfate, potassium tetrathiomolybdate (K 2 MoS 4 ) and deionized water were mixed and dissolved according to the mass ratio of 0.001:0.003:1 to obtain solution B. Then, mix solution A and solution B in equal volumes and carry out hydrothermal reaction. The reaction temperature is 120°C and the reaction time is 8 hours. Under the conditions of 0.8KPa and 60°C, vacuum drying was carried out for 10 hours to obtain cobalt-molybdenum bimetallic sulfides.

[0045] The electrode material of the cobalt-molybdenum bimetallic sulfide synthesized in this example was subjected to the same electrochemical test as in Example 1. After testing, its specific capacitance value r...

preparation example 3

[0047] In the synthetic method of the cobalt-molybdenum bimetallic sulfide that is used for the supercapacitor electrode material of this example, at first, cobalt bromide (CoBr 2 ) and deionized water are mixed and dissolved at a ratio of 0.003:1 to obtain solution A, and then the morphology regulator hexadecyltrimethylammonium bromide, ammonium tetrathiomolybdate ((NH 4 ) 2 MoS 4 ) and deionized water were mixed and dissolved according to the mass ratio of 0.002:0.004:1 to obtain solution B. Then, mix solution A and solution B in equal volumes and carry out hydrothermal reaction. The reaction temperature is 140°C and the reaction time is 10 hours. Under the conditions of 0.8KPa and 60°C, vacuum drying was carried out for 10 hours to obtain cobalt-molybdenum bimetallic sulfides.

[0048] The same electrochemical test as in Example 1 was performed on the cobalt-molybdenum bimetallic sulfide electrode material synthesized in this example. After testing, its specific capacita...

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Abstract

The invention provides a synthesis method of a cobalt-molybdenum bimetallic sulfide for a supercapacitor electrode material. The synthesis method comprises the following steps: mixing and dissolving acobalt salt and deionized water to obtain a solution A, mixing and dissolving a morphology regulator, tetrathiomolybdate and deionized water to obtain a solution B, mixing the solution A and solutionB in the same volume and performing a hydrothermal reaction, cooling after the reaction is completed, and washing and drying to obtain the cobalt-molybdenum bimetallic sulfide. According to the synthesis method of the cobalt-molybdenum bimetallic sulfide in the invention, the cobalt-molybdenum bimetallic sulfide prepared by combining the cobalt salt and the tetrathiomolybdate is used as an electrode material for a supercapacitor, and has high reversibility and excellent cycle stability. Meanwhile, the prepared cobalt-molybdenum bimetallic sulfide is a loose porous structure formed by the accumulation of nanoparticles, and the loose porous structure is conducive to the diffusion of electrolyte ions, can greatly increase the specific capacitance of the capacitor and has good electrochemicalperformance.

Description

technical field [0001] The invention relates to the technical field of preparation of capacitor electrode materials, in particular to a method for synthesizing cobalt-molybdenum bimetallic sulfides used for supercapacitor electrode materials. Background technique [0002] As a new type of energy storage device, supercapacitors have the advantages of high power density and long charging and discharging time. As the main evaluation standard of supercapacitors, the selection of electrode materials for supercapacitors is also particularly important. Transition metal sulfides have higher specific capacitance and conductivity than the corresponding oxides, so more and more people are focusing on metal sulfides. Many monometallic sulfides, including NiS / Ni 3 S 2 , CoS and MoS 2 etc., have been widely used as electrode materials for supercapacitors and exhibit good capacitive properties. [0003] Currently, Tang et al. synthesized CoS by solvothermal method. 2 / rGO nanocomposit...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCH01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 徐晓阳魏婷赵莹张向京
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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