Super capacitor-used composite material and preparation method thereof

Abstract

The invention relates to a super capacitor-used composite material and a preparation method thereof. With coal as a raw material, a coal sample is crushed and screened to powder with a certain particle size, temperature of the powder rises to 600 to 800 DEG C at a temperature rise rate of 25 to 35 DEG C / min, carbonization is then carried out to obtain a carbonized material, temperature of the carbonized material rises to 800 to 1100 DEG C at a temperature rise rate of 25 to 35 DEG C / min, an activated gas is fed, 3 to 5 h of activation is carried out, and cooling to room temperature is carried out; after the material is washed by water for 3 to 6 times, acid cleaning is firstly carried out, and distilled water is then used for washing until PH is near to 7; and in a certain condition, drying to a constant weight is carried out, and an activated carbon composite material is obtained. The activated carbon material prepared in the invention is an electrode material, the activated carbon material has a large specific surface area, large total pore volume and high mesopore ratio, the specific capacitance and the charge and discharge cycle performance of the super capacitor are improved, and requirements on the high specific capacitance and the excellent large current performance by the super capacitor are met.

Description

technical field

[0001] The invention relates to the technical field of electrode materials, in particular to a composite material for a supercapacitor and a preparation method thereof. Background technique

[0002] A supercapacitor is an energy storage element between a battery and a traditional capacitor based on an electrochemical process at the electrode / electrolyte interface. Its capacity comes from electric double layer capacitance and Faraday quasi-capacitance. The battery has the characteristics of high energy density, excellent continuous and rapid charge and discharge performance, long cycle life, high power density, wide operating temperature range, and environmental friendliness. Supercapacitors have broad application prospects in many fields, such as mobile communications, information technology, aerospace, national defense technology, civilian fields or used alone to adjust electric loads, store electricity, or with fuel cells, solar cells, wind power, internal ...

Examples

Embodiment 1

[0016] A composite material for a supercapacitor and a preparation method thereof, using coal as a raw material, comprising the steps of:

[0017] a. Crush and sieve the coal sample to powder with a certain particle size, perform demineralization treatment, dry, heat the powder to 600°C at a heating rate of 25°C / min, and carbonize to obtain carbonized material. Mix evenly at a ratio of 1:1.5 and filter; b. Activation of the carbonized material: After the carbonized material prepared in step a is heated to 800°C at a heating rate of 25°C / min, an activation gas is introduced, activated for 3-5h, and cooled to Room temperature; c, washing the material obtained in step b with water for 3 times, then acid washing, and then washing with distilled water until the pH is close to 7; d, drying to constant weight under certain conditions to obtain the activated carbon composite material.

[0018] The raw material selected in the step a is lignite, and the selected activator is zinc chlor...

Embodiment 2

[0020] A composite material for a supercapacitor and a preparation method thereof, using coal as a raw material, comprising the steps of:

[0021] a. Crush and sieve the coal sample to a powder with a certain particle size, perform demineralization treatment, dry, heat the powder to 800°C at a heating rate of 35°C / min, and carbonize to obtain a carbonized material. The activator solution is pressed Mix evenly in a ratio of 1:3.5, and filter; b. Activation of the carbonized material: After the carbonized material prepared in step a is heated up to 1100° C. at a heating rate of 35° C. / min, an activation gas is introduced, activated for 5 hours, and cooled to room temperature; c, washing the material obtained in step b with water for 6 times, then acid washing, and then washing with distilled water until the pH is close to 7; d, drying to constant weight under certain conditions to obtain the activated carbon composite material.

[0022] The raw material selected in the step a is...

technical field

[0001] The invention relates to the technical field of electrode materials, in particular to a composite material for a supercapacitor and a preparation method thereof. Background technique

[0002] A supercapacitor is an energy storage element between a battery and a traditional capacitor based on an electrochemical process at the electrode / electrolyte interface. Its capacity comes from electric double layer capacitance and Faraday quasi-capacitance. The battery has the characteristics of high energy density, excellent continuous and rapid charge and discharge performance, long cycle life, high power density, wide operating temperature range, and environmental friendliness. Supercapacitors have broad application prospects in many fields, such as mobile communications, information technology, aerospace, national defense technology, civilian fields or used alone to adjust electric loads, store electricity, or with fuel cells, solar cells, wind power, internal ...

Examples

Embodiment 1

[0016] A composite material for a supercapacitor and a preparation method thereof, using coal as a raw material, comprising the steps of:

[0017] a. Crush and sieve the coal sample to powder with a certain particle size, perform demineralization treatment, dry, heat the powder to 600°C at a heating rate of 25°C / min, and carbonize to obtain carbonized material. Mix evenly at a ratio of 1:1.5 and filter; b. Activation of the carbonized material: After the carbonized material prepared in step a is heated to 800°C at a heating rate of 25°C / min, an activation gas is introduced, activated for 3-5h, and cooled to Room temperature; c, washing the material obtained in step b with water for 3 times, then acid washing, and then washing with distilled water until the pH is close to 7; d, drying to constant weight under certain conditions to obtain the activated carbon composite material.

[0018] The raw material selected in the step a is lignite, and the selected activator is zinc chlor...

Embodiment 2

[0020] A composite material for a supercapacitor and a preparation method thereof, using coal as a raw material, comprising the steps of:

[0021] a. Crush and sieve the coal sample to a powder with a certain particle size, perform demineralization treatment, dry, heat the powder to 800°C at a heating rate of 35°C / min, and carbonize to obtain a carbonized material. The activator solution is pressed Mix evenly in a ratio of 1:3.5, and filter; b. Activation of the carbonized material: After the carbonized material prepared in step a is heated up to 1100° C. at a heating rate of 35° C. / min, an activation gas is introduced, activated for 5 hours, and cooled to room temperature; c, washing the material obtained in step b with water for 6 times, then acid washing, and then washing with distilled water until the pH is close to 7; d, drying to constant weight under certain conditions to obtain the activated carbon composite material.

[0022] The raw material selected in the step a is...