Preparation method and application of cobalt tetrasulfide nickel and nickel-vanadium double-metal hydroxide composite material

A technology of cobalt tetrasulfide and hydroxide, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of NiV-LDH ion transmission rate and electronic conductivity, poor conductivity of LDH, etc. , to achieve the effect of improving charging/discharging efficiency, low equipment requirements, and high specific capacitance

Active Publication Date: 2021-06-22
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor electrical conductivity of existing LDH and the poor ion transmission rate and electronic con

Method used

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  • Preparation method and application of cobalt tetrasulfide nickel and nickel-vanadium double-metal hydroxide composite material
  • Preparation method and application of cobalt tetrasulfide nickel and nickel-vanadium double-metal hydroxide composite material
  • Preparation method and application of cobalt tetrasulfide nickel and nickel-vanadium double-metal hydroxide composite material

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specific Embodiment approach 1

[0040] Specific embodiment one: a kind of preparation method of dicobalt nickel tetrasulfide@nickel vanadium double metal hydroxide composite material is completed according to the following steps:

[0041] 1. Preparation of NiCo precursor:

[0042] ①. Dissolving cobalt nitrate hexahydrate, nickel nitrate hexahydrate and urea in deionized water, stirring evenly to obtain mixture I;

[0043]The mol ratio of cobalt nitrate hexahydrate, nickel nitrate hexahydrate and urea described in step 1. is (1~2):(1~2):6;

[0044] ②. Cut the large pieces of foamed nickel into small pieces of foamed nickel, collect the small pieces of foamed nickel, and obtain the raw material of foamed nickel;

[0045] The thickness of the small foam nickel described in step 1.2 is 1cm, and the surface area is 3cm 2 ~5cm 2 ;

[0046] ③. Transfer the mixture I and nickel foam raw materials to a polytetrafluoroethylene autoclave, then carry out hydrothermal reaction, and finally cool naturally to room temp...

specific Embodiment approach 2

[0066] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the volume ratio of the amount of cobalt nitrate hexahydrate described in step one 1. to ionized water is (1mmol~2mmol): 80mL; step one 3. The temperature of the hydrothermal reaction described in is 80°C-120°C, and the time of the hydrothermal reaction is 5h-10h. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0067] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 1 ④, first use deionized water to clean the reaction product I for 3 to 5 times, and then use absolute ethanol to clean the reaction product. I was washed 3 to 5 times, and finally the washed reaction product I was dried at a temperature of 70°C to 80°C and a drying time of 10h to 12h to obtain a NiCo precursor. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method and application of a cobalt disulfide nickel and nickel-vanadium double-metal hydroxide composite material, and relates to a preparation method and application of a cobalt disulfide nickel composite material. The invention aims to solve the problems of poor conductivity of the existing LDH and poor ion transmission rate and electron conductivity of NiV-LDH. The method comprises the following steps: 1, preparing a NiCo precursor; 2, preparing NiCo < 2 > S < 4 >/NF; and 3, preparing the NiCo < 2 > S < 4 > (at) NiV-LDH/NF. The cobalt tetrasulfide nickel and nickel-vanadium double-metal hydroxide composite material prepared by the preparation method disclosed by the invention is used as an electrode material of a supercapacitor, has relatively high specific capacitance which is 3072.8 F/g-3557.6 F/g, and can be applied to the supercapacitor with high energy density. According to the invention, the cobalt tetrasulfide nickel and nickel-vanadium double-metal hydroxide composite material can be obtained.

Description

technical field [0001] The invention relates to a preparation method and application of a cobalt tetrasulfide nickel alloy composite material. Background technique [0002] With the rapid development of society and economy, it has brought about the rapid consumption of fossil fuels and the aggravation of environmental pollution, forcing people to develop more efficient, clean and renewable energy. Common renewable energy sources, such as wind energy, tidal energy, and solar energy, are intermittent energy sources that cannot guarantee continuous output of stable current during power generation, which poses a higher challenge to power storage. Therefore, the construction of energy storage devices has become particularly important. Supercapacitors have received extensive attention due to their excellent electrochemical properties, such as fast charge / discharge rates, high specific capacity, high power density, long cycle life, and environmental protection. [0003] Layered d...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/36H01G11/86
CPCH01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 李少斌潘靖张丽于婷婷马麟
Owner QIQIHAR UNIVERSITY
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