Licorice root residue graded porous carbon, preparation method and applications thereof

A licorice slag, graded porous technology, applied in the field of carbon materials, can solve the problems of inability to adapt to industrial production, low specific surface area of ​​carbon materials, and cumbersome pretreatment of precursors, etc., and achieves good cycle stability, high specific surface area, and activation method. efficient effect

Pending Publication Date: 2019-11-19
SHIHEZI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above scheme has the following disadvantages: the pretreatment of the precursor is cumbersome and cannot be adapted to industrial production; the prepared carbon material has a low specific surface area and an unreasonable pore size distribution, resulting in low energy density when used as an electrode material
Some of these wastes are used in the feed industry, but most of them will be landfilled or incinerated as solid wastes, which not only wastes resources, but also puts huge pressure on the environment

Method used

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  • Licorice root residue graded porous carbon, preparation method and applications thereof
  • Licorice root residue graded porous carbon, preparation method and applications thereof
  • Licorice root residue graded porous carbon, preparation method and applications thereof

Examples

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preparation example Construction

[0030] The invention provides a preparation method of licorice residue-based classified porous carbon, which comprises the following steps:

[0031] Carrying out the first heat treatment on the licorice residue to obtain a pre-carbonized product;

[0032] The pre-carbonized product and lye are mixed, dried, and subjected to a second heat treatment to obtain licorice residue-based hierarchical porous carbon.

[0033] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0034] In the present invention, the licorice residue is subjected to the first heat treatment to obtain a pre-carbonized product; in the present invention, before the first heat treatment, the licorice residue is preferably pretreated, and the pretreatment preferably includes washing and drying; the present invention There is no special limitation on the washing and drying, and the washing and drying proce...

Embodiment 1

[0051] After washing and drying the licorice dregs, take 2 g of licorice dregs and cut them into pieces, put them into a porcelain boat, then place the porcelain boat in a tube furnace, and put N 2 Exhaust the air in the tube furnace (and maintain the nitrogen environment), heat it up to 350°C at a heating rate of 5°C / min, keep it warm for 60 minutes, stop heating, and cool to room temperature with the furnace to obtain a pre-carbonized product;

[0052] Put 1 g of the pre-carbonized product into 50 mL of KOH aqueous solution with a concentration of 0.7 mol / L (the mass ratio of the pre-carbonized product to KOH is 1:1), stir evenly, and put it in a blast drying oven at 80 ° C. Dry for 10 hours;

[0053] Grind the above-mentioned dried product, and put the ground product into a porcelain boat, then place the porcelain boat in a tube furnace, and pass N 2 Exhaust the air in the tube furnace (and maintain the nitrogen environment), heat it up to 750°C at a heating rate of 5°C / mi...

Embodiment 2

[0055] The preparation method of the licorice slag-based hierarchical porous carbon refers to Example 1, the only difference is that the mass ratio of the pre-carbonization product to KOH is 1:2, and the licorice slag-based hierarchical porous carbon is denoted as C-2- 750.

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Abstract

The invention relates to the technical field of carbon materials, particularly to licorice root residue graded porous carbon, a preparation method and applications thereof. According to the present invention, the preparation method has simple steps and is suitable for industrialized production; by using licorice root residue as a precursor, the resource reuse is achieved; and the licorice root residue graded porous carbon prepared by the preparation method has characteristics of high specific surface area and reasonable pore size distribution, and has high energy density when the licorice rootresidue graded porous carbon is used as an electrode material.

Description

technical field [0001] The invention relates to the technical field of carbon materials, in particular to a licorice residue-based graded porous carbon, a preparation method and application thereof. Background technique [0002] With the rapid growth of global population and excessive dependence on fossil energy, human beings are facing increasingly serious energy crisis and environmental problems, which prompt people to develop clean, efficient and renewable new energy sources and explore new energy storage and conversion technologies. [0003] Supercapacitors, mainly composed of electrodes, diaphragms, electrolytes, and current collectors, are a new type of capacitor based on the theory of electric double layers. Among them, the electrode material of the supercapacitor, as the main component of the energy storage device, plays a decisive role in the electrochemical performance of the energy storage device. Biomass, as a relatively abundant renewable resource, is an import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324H01G11/44H01G11/34
CPCC01B32/324C01B32/348H01G11/34H01G11/44Y02E60/13
Inventor 张根林陈利威周倩云党艳艳
Owner SHIHEZI UNIVERSITY
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