Preparation method of carbon cloth-based nickel-cobalt bimetal selenide nano square sheet electrode material

Abstract

The invention belongs to the technical field of energy materials, and relates to a preparation method and an application of a carbon cloth-based nickel-cobalt bimetal selenide nano square sheet electrode material. The preparation method comprises the following steps: adding a soluble cobalt salt, a soluble nickel salt, medium-tetra(4-carboxyphenyl)porphin and 4, 4 '-dipyridyl into an N, N-dimethylformamide and ethanol solution, carrying out ultrasonic uniform dispersion, carrying out a hydrothermal reaction with controllable temperature programming together with a carbon cloth substrate, and carrying out cleaning and drying to obtain a carbon cloth-based nickel-cobalt bimetal organic framework nano square sheet precursor; and putting selenium powder and the carbon cloth-based nickel-cobaltmetal organic framework nano square sheet precursor into a tubular furnace, and carrying out selenylation reaction to obtain a carbon cloth-based nickel-cobalt bimetal selenide nano square sheet electrode material. The metal selenide electrode material prepared by the invention has stable morphology, high specific surface area, more active sites, good mechanical stability, high conductivity, excellent electrochemical energy storage performance and electrochemical cycling stability.

Description

technical field

[0001] The invention belongs to the technical field of energy materials, and in particular relates to a preparation method of a novel carbon cloth-based nickel-cobalt double-metal selenide nano-square sheet electrode material. Background technique

[0002] With the extensive use of non-renewable resources by humans and the destruction of the ecological environment, the development and use of new green and environmentally friendly energy storage devices is very important; among them, supercapacitors refer to a new type of energy storage between traditional capacitors and rechargeable batteries. It has the characteristics of fast charging and discharging of traditional capacitors and the energy storage characteristics of batteries, and has the characteristics of good temperature characteristics, short charging time, long cycle life, and environmental protection. At present, with its powerful storage capacity and storage performance, supercapacitors are specific...

Examples

Embodiment 1

[0037] Step 1. Preparation of carbon cloth-based nickel-cobalt metal-organic framework nanosheets:

[0038] Firstly, the carbon cloth is cut, the length and width are 1.5cm×1cm, the carbon cloth is ultrasonically washed in acetone, 30% hydrochloric acid, deionized water and ethanol solution, and dried to obtain a dry carbon cloth; then Take 0.021mmol of cobalt nitrate, 0.009mmol of nickel nitrate, 0.01mmol of medium-tetrakis(4-carboxyphenyl) porphine, 0.02mmol of 4,4'-bipyridyl, add 3mL of N,N-dimethyl Formamide and 1mL of ethanol were ultrasonically mixed for 25min to obtain a purple-red mixed solution, which was transferred to a 10mL transparent bottle with a cap, and the dry carbon cloth was immersed in it, heated to 80°C in an oven for 12h, and then cooled To room temperature, take out the product, wash 5 times with ethanol, and vacuum-dry the product after cleaning to obtain carbon cloth-based nickel-cobalt metal-organic framework nanosheets; its scanning electron microsc...

Embodiment 2

[0048] Step 1. Preparation of carbon cloth-based nickel-cobalt metal-organic framework nanosheets:

[0049] Firstly, the carbon cloth is cut, the length and width are 1.5cm×1cm, the carbon cloth is ultrasonically washed in acetone, 30% hydrochloric acid, deionized water and ethanol solution, and dried to obtain a dry carbon cloth; then Take 0.048mmol of cobalt nitrate, 0.012mmol of nickel nitrate, 0.02mmol of medium-tetrakis(4-carboxyphenyl) porphine, 0.04mmol of 4,4'-bipyridine, add 3mL of N,N-dimethyl Formamide and 1mL of ethanol were ultrasonically mixed for 25min to obtain a purple-red mixed solution, which was transferred to a 10mL transparent bottle with a cap, and the dry carbon cloth was immersed in it, heated to 100°C in an oven for 24h, and then cooled to room temperature, take out the product, wash with ethanol for 5 times, and vacuum-dry the cleaned product to obtain carbon cloth-based nickel-cobalt metal-organic framework nanosheets;

[0050] Step 2, preparation ...

Embodiment 3

[0053] Step 1. Preparation of carbon cloth-based nickel-cobalt metal-organic framework nanosheets:

[0054] Firstly, the carbon cloth is cut, the length and width are 1.5cm×1cm, the carbon cloth is ultrasonically washed in acetone, 30% hydrochloric acid, deionized water and ethanol solution, and dried to obtain a dry carbon cloth; then Take 0.063mmol of cobalt nitrate, 0.027mmol of nickel nitrate, 0.03mmol of medium-tetrakis(4-carboxyphenyl) porphine, 0.06mmol of 4,4'-bipyridine, add 6mL of N,N-dimethyl Formamide and 2mL of ethanol were ultrasonically mixed for 25min to obtain a purple-red mixed solution, which was transferred to a 10mL transparent bottle with a cap, and the dry carbon cloth was immersed in it, heated to 120°C in an oven for 24h, and then cooled to room temperature, take out the product, wash with ethanol for 5 times, and vacuum-dry the cleaned product to obtain carbon cloth-based nickel-cobalt metal-organic framework nanosheets;

[0055] Step 2, preparation ...

technical field

[0001] The invention belongs to the technical field of energy materials, and in particular relates to a preparation method of a novel carbon cloth-based nickel-cobalt double-metal selenide nano-square sheet electrode material. Background technique

[0002] With the extensive use of non-renewable resources by humans and the destruction of the ecological environment, the development and use of new green and environmentally friendly energy storage devices is very important; among them, supercapacitors refer to a new type of energy storage between traditional capacitors and rechargeable batteries. It has the characteristics of fast charging and discharging of traditional capacitors and the energy storage characteristics of batteries, and has the characteristics of good temperature characteristics, short charging time, long cycle life, and environmental protection. At present, with its powerful storage capacity and storage performance, supercapacitors are specific...

Examples

Embodiment 1

[0037] Step 1. Preparation of carbon cloth-based nickel-cobalt metal-organic framework nanosheets:

[0038] Firstly, the carbon cloth is cut, the length and width are 1.5cm×1cm, the carbon cloth is ultrasonically washed in acetone, 30% hydrochloric acid, deionized water and ethanol solution, and dried to obtain a dry carbon cloth; then Take 0.021mmol of cobalt nitrate, 0.009mmol of nickel nitrate, 0.01mmol of medium-tetrakis(4-carboxyphenyl) porphine, 0.02mmol of 4,4'-bipyridyl, add 3mL of N,N-dimethyl Formamide and 1mL of ethanol were ultrasonically mixed for 25min to obtain a purple-red mixed solution, which was transferred to a 10mL transparent bottle with a cap, and the dry carbon cloth was immersed in it, heated to 80°C in an oven for 12h, and then cooled To room temperature, take out the product, wash 5 times with ethanol, and vacuum-dry the product after cleaning to obtain carbon cloth-based nickel-cobalt metal-organic framework nanosheets; its scanning electron microsc...

Embodiment 2

[0048] Step 1. Preparation of carbon cloth-based nickel-cobalt metal-organic framework nanosheets:

[0049] Firstly, the carbon cloth is cut, the length and width are 1.5cm×1cm, the carbon cloth is ultrasonically washed in acetone, 30% hydrochloric acid, deionized water and ethanol solution, and dried to obtain a dry carbon cloth; then Take 0.048mmol of cobalt nitrate, 0.012mmol of nickel nitrate, 0.02mmol of medium-tetrakis(4-carboxyphenyl) porphine, 0.04mmol of 4,4'-bipyridine, add 3mL of N,N-dimethyl Formamide and 1mL of ethanol were ultrasonically mixed for 25min to obtain a purple-red mixed solution, which was transferred to a 10mL transparent bottle with a cap, and the dry carbon cloth was immersed in it, heated to 100°C in an oven for 24h, and then cooled to room temperature, take out the product, wash with ethanol for 5 times, and vacuum-dry the cleaned product to obtain carbon cloth-based nickel-cobalt metal-organic framework nanosheets;

[0050] Step 2, preparation ...

Embodiment 3

[0053] Step 1. Preparation of carbon cloth-based nickel-cobalt metal-organic framework nanosheets:

[0054] Firstly, the carbon cloth is cut, the length and width are 1.5cm×1cm, the carbon cloth is ultrasonically washed in acetone, 30% hydrochloric acid, deionized water and ethanol solution, and dried to obtain a dry carbon cloth; then Take 0.063mmol of cobalt nitrate, 0.027mmol of nickel nitrate, 0.03mmol of medium-tetrakis(4-carboxyphenyl) porphine, 0.06mmol of 4,4'-bipyridine, add 6mL of N,N-dimethyl Formamide and 2mL of ethanol were ultrasonically mixed for 25min to obtain a purple-red mixed solution, which was transferred to a 10mL transparent bottle with a cap, and the dry carbon cloth was immersed in it, heated to 120°C in an oven for 24h, and then cooled to room temperature, take out the product, wash with ethanol for 5 times, and vacuum-dry the cleaned product to obtain carbon cloth-based nickel-cobalt metal-organic framework nanosheets;

[0055] Step 2, preparation ...

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