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Preparation method of biomass hierarchical pore nanoring microstructural carbon-based supercapacitor electrode material

A technology for supercapacitors and electrode materials, applied in hybrid capacitor electrodes, chemical instruments and methods, nanotechnology, etc., can solve the problems of long preparation process cycle, complicated process, unfriendly environment, etc., and achieve excellent electrochemical performance and excellent preparation process. Simple, inexpensive ingredients

Inactive Publication Date: 2020-05-12
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the template method is the main technology commonly used to prepare hierarchically porous carbon materials, but there are a series of problems such as long preparation process cycle, complicated process, and unfriendly to the environment.

Method used

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  • Preparation method of biomass hierarchical pore nanoring microstructural carbon-based supercapacitor electrode material
  • Preparation method of biomass hierarchical pore nanoring microstructural carbon-based supercapacitor electrode material
  • Preparation method of biomass hierarchical pore nanoring microstructural carbon-based supercapacitor electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Put 9g of sweet potato stem and leaf powder in a porcelain boat, put it into a tube furnace, vacuum, replace the air in the tube furnace with nitrogen, and then under the protection of atmospheric nitrogen, the temperature is 5℃ / min from room temperature The heating rate is increased to 600°C, after 2 hours of constant temperature pyrolysis treatment, the temperature is naturally cooled to room temperature to obtain biomass carbide, which is recorded as BLSC-0;

[0030] (2) Put 1g BLSC-0 and 3g solid KOH into the container, then add 10mL deionized water and stir well to mix evenly, stand at room temperature for 24h and then dry at 120℃ to obtain the biomass BLSC-0 / KOH mixture;

[0031] (3) Transfer the BLSC-0 / KOH mixture to a nickel boat, put it in a tube furnace, evacuate, replace the air in the tube furnace with nitrogen, and then heat up at 10°C / min under the protection of atmospheric nitrogen The rate is heated from room temperature to 600 ℃ constant temperature acti...

Embodiment 2

[0034] (1) Put 9g of sweet potato stem and leaf powder in a porcelain boat, put it into a tube furnace, vacuum, replace the air in the tube furnace with nitrogen, and then under the protection of atmospheric nitrogen, the temperature is 5℃ / min from room temperature The heating rate is increased to 600°C, after 2 hours of constant temperature pyrolysis treatment, the temperature is naturally cooled to room temperature to obtain biomass carbide, which is recorded as BLSC-0;

[0035] (2) Put 1g BLSC-0 and 3g solid KOH into the container, then add 10mL deionized water and stir well to mix evenly, let stand at room temperature for 24h and then dry at 120℃ to obtain the BLSC-0 / KOH mixture;

[0036] (3) Transfer the BLSC-0 / KOH mixture to a nickel boat, put it in a tube furnace, evacuate, replace the air in the tube furnace with nitrogen, and then heat up at 10°C / min under the protection of atmospheric nitrogen The rate is heated from room temperature to 700℃ constant temperature activatio...

Embodiment 3

[0039] (1) Put 9g of sweet potato stem and leaf powder in a porcelain boat, put it into a tube furnace, vacuum, replace the air in the tube furnace with nitrogen, and then under the protection of atmospheric nitrogen, the temperature is 5℃ / min from room temperature The heating rate is increased to 600°C, after 2 hours of constant temperature pyrolysis treatment, the temperature is naturally cooled to room temperature to obtain biomass carbide, which is recorded as BLSC-0;

[0040] (2) Put 1g BLSC-0 and 4g solid KOH into the container, then add 10mL deionized water and stir well to mix evenly, let stand at room temperature for 24h and then dry at 120℃ to obtain BLSC-0 / KOH mixture;

[0041] (3) Transfer the BLSC-0 / KOH mixture to a nickel boat, put it in a tube furnace, evacuate, replace the air in the tube furnace with nitrogen, and then heat up at 10°C / min under the protection of atmospheric nitrogen The rate is heated from room temperature to 600 ℃ constant temperature activation t...

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Abstract

The invention discloses a preparation method of a biomass hierarchical pore nanoring microstructural carbon-based supercapacitor electrode material. The preparation method comprises the following steps: cleaning, drying and crushing waste biomass sweet potato stalks, stems, leaves and the like into uniform powder; carrying out constant-temperature pyrolysis treatment for 2 hours under the protection of inert gas at 600 DEG C, and naturally cooling to room temperature to obtain a biomass carbide; mixing the carbide with a solid KOH in a container, adding water, fully soaking, and drying to obtain a carbide / KOH mixture; activating for 2 hours under the protection of inert gas at 600-900 DEG C, and naturally cooling to room temperature to obtain a crude product; and putting the crude productinto a container filled with a hydrochloric acid solution, soaking for 24 hours, washing with deionized water until a filtrate is neutral, and drying at 80 DEG C for 24 hours to obtain the hierarchical pore nanoring microstructural carbon-based supercapacitor electrode material. The supercapacitor electrode material prepared by the method is a nitrogen-oxygen co-doped high-grade carbon material with hierarchical pores and a nano-ring microstructure, and has relatively good electrochemical performance when being used as the supercapacitor electrode material.

Description

Technical field [0001] The invention belongs to the technical field of preparation of supercapacitor electrode materials, and specifically relates to a preparation method of a biomass multi-level pore nano-ring microstructure carbon-based supercapacitor electrode material. Background technique [0002] Energy is an important material basis for the survival and sustainable development of human society. As a new type of energy storage device, supercapacitors are based on high power, which can complete the charge and discharge process in a few seconds, long-term maintenance-free, use in a wide temperature range, high safety and other excellent energy storage performance. They are used in new energy electric vehicles, uninterrupted power supplies, Intelligent start-stop, aerospace, transportation, power energy, construction machinery, military industry and national defense and other fields have huge application value and market potential, and the key factor that determines the perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324B82Y40/00H01G11/44H01G11/34
CPCC01B32/348C01B32/324B82Y40/00H01G11/44H01G11/34Y02E60/13
Inventor 魏献军李苞魏济时
Owner HENAN NORMAL UNIV