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Preparation method of biomass pomelo peel derived activated carbon serving as electrode material of super capacitor

A technology of supercapacitors and electrode materials, applied in the direction of hybrid capacitor electrodes, etc., can solve the problem of low capacity of manganese oxide, and achieve the effect of large specific surface area, rich grade pore structure, and strong repeatability

Inactive Publication Date: 2015-12-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, so far, the capacitance of traditional activated carbon materials is basically 100-200F / g, which is lower than that of manganese oxide (~300F / g).

Method used

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  • Preparation method of biomass pomelo peel derived activated carbon serving as electrode material of super capacitor
  • Preparation method of biomass pomelo peel derived activated carbon serving as electrode material of super capacitor
  • Preparation method of biomass pomelo peel derived activated carbon serving as electrode material of super capacitor

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preparation example Construction

[0028] Referring to accompanying drawing, the present invention is the preparation method of biomass pomelo peel derived activated carbon as supercapacitor electrode material, and its steps are:

[0029] Step 1: Weigh 0.1-10.0g of pomelo peel and add it to a 15-500ml hydrothermal reaction kettle, add water to 1 / 2-5 / 6 of the internal volume of the axe, stir to form a clear and transparent liquid;

[0030] Step 2: The above-mentioned clear and transparent liquid is subjected to a hydrothermal reaction for 2-24 hours at a temperature of 160-200° C., then filtered to obtain the reaction product, and the reaction product is washed 3 times with water and ethanol respectively, and then the reaction product is put into Drying in an oven at low temperature to obtain the hydrothermal carbonization product of pomelo peel;

[0031] Step 3: Weigh 0.1-5.0 g of the above hydrothermal carbonization product of pomelo peel, add it to 20-500 ml of water, then add potassium hydroxide, stir evenly...

Embodiment 1

[0044] Embodiment 1 adopts this method to prepare honeycomb activated carbon with hierarchical pore structure

[0045] (1) Hydrothermal carbonization pretreatment of pomelo peel.

[0046] Weigh 1.0g of Beibei honey pomelo and add it to a 150ml hydrothermal reaction kettle, add water to 3 / 4 of the internal volume of the axe, stir for 1 hour, and form a clear and transparent liquid.

[0047]The above clear and transparent liquid was subjected to a hydrothermal reaction at 200°C for 2 hours, then filtered to obtain the reaction product, washed with water and ethanol three times respectively, and then put the reaction product into an oven and heated at 80°C Dry for 3 hours under ambient conditions to obtain the hydrothermal carbonization product of pomelo peel.

[0048] (2) Potassium hydroxide activated pomelo peel to prepare activated carbon material.

[0049] Weigh 0.2g of the above hydrothermal carbonization product of pomelo peel and 4.0g of potassium hydroxide, add it into ...

Embodiment 2

[0053] Example 2 Using this method to prepare honeycomb activated carbon with hierarchical pore structure

[0054] (1) Hydrothermal carbonization pretreatment of pomelo peel.

[0055] Weigh 5.0g of Guanxi honey pomelo and add it to a 200ml hydrothermal reaction kettle, add water to 3 / 4 of the internal volume of the axe, stir for 1 hour, and form a clear and transparent liquid.

[0056] The above clear and transparent liquid was subjected to a hydrothermal reaction for 12 hours at a temperature of 160°C, and then the reaction product was obtained by filtration. The reaction product was washed with water and ethanol three times respectively, and then the reaction product was put into an oven and heated at 80°C. Dry for 48 hours under ambient conditions to obtain the hydrothermal carbonization product of pomelo peel.

[0057] (2) Potassium hydroxide activated pomelo peel to prepare activated carbon material.

[0058] Weigh 1.0 g of the above hydrothermal carbonization product o...

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Abstract

The invention discloses a preparation method of biomass pomelo peel derived activated carbon serving as an electrode material of a super capacitor. The preparation method comprises the following steps: a pomelo peel is subjected to hydrothermal treatment for mild carbonization firstly, a pomelo peel adopting a porous structure is obtained, a hydrothermal product of the pomelo peel and potassium hydroxide are mixed for soaking, so that potassium hydroxide sufficiently diffuses into the pomelo peel, a mixture is calcined at a high temperature finally, carbon balls are activated by potassium hydroxide, and a honeycomb activated carbon material adopting leveled hole structures is prepared. Honeycomb activated carbon prepared with the method has rich leveled hole structures and larger specific surface area, the electrode capacity is as high as 300 F / g when the activated carbon serves as the electrode material of the super capacitor, and the method has the characteristics of simplicity in process operation, high repeatability and low cost.

Description

technical field [0001] The invention relates to the technical field of supercapacitor electrode materials, in particular to a method for preparing activated carbon derived from biomass pomelo peel as a supercapacitor electrode material. Background technique [0002] Supercapacitors have high power density (>10kWkg -1 ), long service life (>10 5 times) and short charge and discharge time (tens of seconds), has been widely used in electronic equipment and hybrid vehicles and other fields, with the rapid development of clean energy and the continuous improvement of vehicle performance, the performance and Cost requirements are getting higher and higher. Most of the current commercial supercapacitor electrode materials are manganese oxide systems. Although the theoretical capacity of the manganese oxide electrode is high, its cycle stability is poor. After thousands of charges and discharges, its capacity decays seriously and its service life is short. The carbon-based ...

Claims

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Application Information

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IPC IPC(8): C01B31/12H01G11/26H01G11/32
CPCY02E60/13
Inventor 郑鹏刘婷郭守武
Owner SHAANXI UNIV OF SCI & TECH
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