Graded porous carbon material and supercapacitor prepared therefrom

A supercapacitor, hierarchical porous technology, applied in the field of materials and energy electrochemistry, to achieve the effect of good conductivity, high specific capacity and rate performance, and low price

Active Publication Date: 2019-10-08
浙江金羽新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in existing capacitor materials, the object of the present invention is to provide a hierarchical porous carbon material

Method used

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  • Graded porous carbon material and supercapacitor prepared therefrom
  • Graded porous carbon material and supercapacitor prepared therefrom
  • Graded porous carbon material and supercapacitor prepared therefrom

Examples

Experimental program
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Effect test

Embodiment 1

[0028] This embodiment includes the following steps:

[0029] Step (1): Mix diatomaceous earth and furfuryl alcohol at a mass ratio of 1:5, stir at room temperature for 1.5 h, and heat at 95° C. for 24 h. Then it was transferred to a tube furnace and heated at 900 °C for 3 h under an argon atmosphere at a heating rate of 5 °C / min to make it completely carbonized.

[0030] Step (2): Mix the obtained template carbon and potassium hydroxide solid at a mass ratio of 1:3, activate at 700°C for 1 hour at a heating rate of 5°C / min in an argon atmosphere, and wash with dilute hydrochloric acid after cooling Wash with deionized water and dry to obtain hierarchical porous carbon materials.

[0031] figure 1 is the X-ray diffraction pattern of the prepared hierarchical porous carbon material. There are two broad diffraction peaks at about 23° and 43°, corresponding to the (002) and (100) crystal planes of graphite respectively. After calculation, the (002) of the porous carbon material...

Embodiment 2

[0038] This embodiment includes the following steps:

[0039] Step (1): Mix diatomaceous earth and furfuryl alcohol at a mass ratio of 1:5, stir at room temperature for 1.5 h, and heat at 95° C. for 24 h. Then it was transferred to a tube furnace and heated at 900 °C for 3 h under an argon atmosphere at a heating rate of 5 °C / min to make it completely carbonized.

[0040] Step (2): Mix the obtained template carbon and potassium hydroxide solid at a mass ratio of 1:3, activate at 800°C under an argon atmosphere at a heating rate of 5°C / min for 1 hour, and then wash with dilute hydrochloric acid after cooling Wash with deionized water and dry to obtain hierarchical porous carbon materials.

[0041] The specific surface area of ​​the prepared hierarchical porous carbon material is 854.9m 2 / g.

[0042] The prepared graded porous carbon material, conductive carbon and PTFE were mixed evenly according to the mass ratio of 80:10:10, and after the grinding was sufficient, they wer...

Embodiment 3

[0045] This embodiment includes the following steps:

[0046] Step (1): Mix diatomaceous earth and furfuryl alcohol at a mass ratio of 1:5, stir at room temperature for 1.5 h, and heat at 95° C. for 24 h. Then it was transferred to a tube furnace and heated at 900 °C for 3 h under an argon atmosphere at a heating rate of 5 °C / min to make it completely carbonized.

[0047] Step (2): Mix the obtained template carbon and potassium hydroxide solid at a mass ratio of 1:3, activate at 900°C under an argon atmosphere at a heating rate of 5°C / min for 1 hour, and rinse with dilute hydrochloric acid after cooling Wash with deionized water and dry to obtain hierarchical porous carbon materials.

[0048] The specific surface area of ​​the prepared hierarchical porous carbon material is 1170.5m 2 / g.

[0049] The prepared graded porous carbon material, conductive carbon and PTFE were mixed evenly according to the mass ratio of 80:10:10, and after the grinding was sufficient, they were mix...

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Abstract

The invention belongs to the field of material and energy electrochemistry and relates to a graded porous carbon material, a synthesis method thereof and application thereof serving as supercapacitorelectrode material. The graded porous carbon material has three-dimensional micro-nano pores. The synthesis method includes: utilizing porous mineral as a formwork and organic matter as a carbon source, mixing for carbonization, and activating to obtain the graded porous carbon material. A preparation method is simple and easy to implement, high in yield and low in cost, and the carbon material prepared by the method has high specific capacity and rate performance under high current density when being used as the supercapacitor electrode material.

Description

technical field [0001] The invention belongs to the field of material and energy electrochemistry, and relates to a graded porous carbon material, a method for synthesizing the graded porous carbon material, and its application as a supercapacitor electrode material. Background technique [0002] The depletion of fossil fuels and environmental pollution have had a great impact on global economic development and the ecological environment. [0003] Therefore, the search for clean alternative energy has become a hot topic in today's social research. Supercapacitors have the characteristics of high specific energy and specific power density, long cycle life, short charging time, wide operating temperature range, and environmental protection. They are used in consumer electronics, backup systems, industrial power and energy management, electric vehicles, aerospace, etc. There are a wide range of applications. Supercapacitors can be divided into three types: electric double lay...

Claims

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Application Information

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IPC IPC(8): C01B32/318C01B32/348C01B32/336H01G11/24H01G11/44
CPCH01G11/24H01G11/44Y02E60/13
Inventor 黄杜斌李爱军田波高雪鑫杨扬姚俊超
Owner 浙江金羽新能源科技有限公司
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