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Preparation method and application of biomass porous carbon for supercapacitor

A supercapacitor, biomass technology, applied in chemical instruments and methods, hybrid capacitor electrodes, carbon compounds, etc., can solve the problems of low content of doping atoms, irregular pore structure, small specific surface area, etc., to achieve large specific surface area, The effect of good pore structure, simple preparation method and process

Inactive Publication Date: 2019-12-03
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Limited by the structural characteristics of biomass itself, it has been reported that biomass has problems such as irregular pore structure, small specific surface area, low content of doping atoms, and low specific capacity.

Method used

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  • Preparation method and application of biomass porous carbon for supercapacitor
  • Preparation method and application of biomass porous carbon for supercapacitor
  • Preparation method and application of biomass porous carbon for supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Crushing the Luo Han Guo shell into fine particles, passing through a 200-mesh filter, placing it in a blast drying oven, and drying at 90°C;

[0036](2) Mix the above-mentioned Luo Han Guo shell sample with KOH and urea in a certain mass ratio, add distilled water and stir evenly, and dry the mixture completely at 105°C;

[0037] (3) Using a tube furnace, under the protection of argon, heat-treat the dried sample at 800°C for 2h at a heating rate of 2°C / min, and naturally cool to room temperature to obtain a black product;

[0038] (4) The product was washed several times with 2M HCl to remove impurities, and then washed with distilled water until neutral pH=7. The cleaned sample was vacuum-dried at 100° C. to obtain the target product, biomass porous carbon for supercapacitors.

[0039] Among them, the mass ratio of Luo Han Guo shell sample to KOH and urea is 1:1:1.5, respectively.

[0040] The supercapacitor obtained in Example 1 was tested with biomass porous ...

Embodiment 2

[0043] Repeat the steps of Example 1, and only change the mass ratio of Luo Han Guo shell sample to KOH and urea in step (2) to be 1:1.5:1.

Embodiment 3

[0045] Repeat the steps of Example 1, and only change the mass ratio of Luo Han Guo shell sample to KOH and urea in step (2) to be 1:2:1.

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Abstract

The invention discloses a preparation method and application of biomass porous carbon for a supercapacitor, and belongs to the field of supercapacitor electrode material preparation. According to thepreparation method, fructus momordicae shells are used as a carbon source, KOH and urea are used as activators, and a high-temperature carbonization method is used for preparing a water supercapacitorelectrode material with an excellent performance. The porous carbon material has a porous structure and a large specific surface area, and provides effective active sites for an electrochemical reaction, electrolyte infiltration and transport and migration of a carrier inside the electrode material are facilitated, and the electrochemical performance of the carbon-based material is improved. According to the method, the production process is simple, reliable and environmental-friendly, the characteristics of excellent double-layer capacitor characteristic, high energy density and high power density, no toxicity and no harm in use, and long cycle service life are achieved, the ideal supercapacitor electrode material is provided, and broad application prospects are achieved in the field ofneutral water supercapacitors.

Description

technical field [0001] The invention relates to the field of supercapacitor electrode materials, in particular to a preparation method and application of biomass porous carbon for supercapacitors. Background technique [0002] With the increasing development of science and technology, the modern technological society needs to store and use different scales of energy, so large and small energy systems need to be designed, among which electrical energy storage systems have attracted great interest in the past few decades. [0003] Supercapacitors, also known as supercapacitors or electrochemical double-layer capacitors, are energy storage devices with high power density, fast charging and discharging, and long service life. Supercapacitors have become the first choice in the field of fast and high-power energy storage systems due to their high energy and power densities and excellent cycle performance. The electrode materials in supercapacitors play a vital role in the perfor...

Claims

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Application Information

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IPC IPC(8): C01B32/324C01B32/348H01G11/24H01G11/30H01G11/44
CPCC01B32/324C01B32/348H01G11/24H01G11/30H01G11/44Y02E60/13
Inventor 樊新李良烁秦琳邓酩
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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