Method for preparing porous carbon spheres by using waste sugar solution and method for preparing electrode sheet by using carbon spheres

A technology for preparing electrodes and porous carbon, which is applied in chemical instruments and methods, hybrid capacitor electrodes, inorganic chemistry, etc., and can solve problems such as environmental pollution and waste of resources

Active Publication Date: 2017-08-04
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, with the increase of production waste, in order to facilitate the disposal of waste, some recyclable waste is directly discharged, which in turn causes environmental pollution and waste of resources

Method used

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  • Method for preparing porous carbon spheres by using waste sugar solution and method for preparing electrode sheet by using carbon spheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Porous carbon spheres were prepared from waste sugar solution.

[0029] Step 1: Filter the waste sugar solution under reduced pressure to remove insoluble impurities, then mix 30 mL of deionized water and 20 mL of the waste sugar solution after suction filtration, and then perform ultrasonic dispersion for 30 minutes to obtain 50 mL of mixed solution.

[0030] The mixed solution obtained above was poured into a 100 mL polytetrafluoroethylene-lined stainless steel hydrothermal reaction kettle. Put the hydrothermal reaction kettle into the blast drying oven, at 180 o After keeping at the temperature of C for 12 h, it was naturally cooled to room temperature to obtain a columnar gel-like carbon material (dark brown).

[0031] Step 2: Mix the columnar gel-like carbon material with deionized water and ultrasonically disperse it for 30 minutes, then mix it with ethanol and ultrasonically disperse it for 30 minutes, then carry out suction filtration, repeat the abo...

Embodiment 2

[0038] Embodiment 2 is basically the same as Embodiment 1, except that the ultrasonic dispersion time described in step 1 is 20 minutes.

Embodiment 3

[0039] Embodiment 3 is basically the same as Embodiment 1, except that the ultrasonic dispersion time described in step 1 is 40 minutes.

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Abstract

The invention discloses a method for preparing porous carbon spheres by using a waste sugar solution. According to the method, the waste sugar solution, rich in 2-keto-L-gulonic acid, produced during production of vitamin C is used; the method comprises the following four steps: preforming hydrothermal carbonization, cleaning and drying the carbon spheres, preparing the porous carbon spheres and preparing an electrode. With the waste sugar solution as a precursor, through the hydrothermal carbonization, the carbon spheres rich in oxygen-containing functional groups on the surfaces are synthesized, and through KOH activation, the porous carbon spheres with relatively good electrochemical performance are prepared. By the method, high-added value utilization of the waste sugar solution produced during preparation of the vitamin C is achieved, the waste sugar solution treatment cost of a biopharmaceutical company is reduced, and the environment pollution is also reduced to a certain extent. The invention discloses a method for preparing an electrode sheet by using the carbon spheres.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to the preparation of carbon spheres by using a waste sugar solution and its application in electrochemistry after chemical activation. Background technique [0002] Energy shortage is a serious problem facing the world today. In order to overcome this problem, it is very important to comprehensively utilize alternative sustainable renewable resources to realize energy conversion and storage. In recent years, research on energy storage technologies such as fuel cells, battery packs, and capacitors has attracted much attention. Electric double-layer capacitors are widely used in many fields because of their high energy density, long cycle life, and performance superior to other battery packs. Moreover, with the increase of production waste, in order to facilitate the disposal of waste, some recyclable waste is directly discharged, which in turn causes environmental poll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324H01G11/44H01G11/24
CPCC01P2004/03C01P2004/32C01P2006/12C01P2006/40H01G11/24H01G11/44Y02E60/13
Inventor 赵小燕曹景沛郝志强吴燕任杰刘天龙王敬贤贺姗
Owner CHINA UNIV OF MINING & TECH
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