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Heteroatom doping porous carbon materials and preparation method thereof

A technology of porous carbon materials and heteroatoms, applied in the field of heteroatom doped porous carbon materials and its preparation, can solve the instability between batches, non-environmentally friendly strong alkali sodium hydroxide, and limit practical application prospects and other problems, to achieve the effect of no capacity attenuation, good industrialization prospects, and low equipment and operation requirements

Inactive Publication Date: 2018-08-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of this invention also uses strong alkali sodium hydroxide, which has a high risk factor and is not environmentally friendly; and catkins are used as a carbon source, the instability of its source and the uncontrollability of differences between batches limit this technology. practical application prospects
[0007] In summary, the existing carbon electrode materials for supercapacitors and their preparation methods still have many problems such as unstable performance, high cost, complicated process, and difficulty in industrialization. Therefore, it is necessary to develop a new carbon electrode material for supercapacitors. and its preparation method

Method used

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  • Heteroatom doping porous carbon materials and preparation method thereof
  • Heteroatom doping porous carbon materials and preparation method thereof
  • Heteroatom doping porous carbon materials and preparation method thereof

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Embodiment 1

[0065] 1. A method for preparing a heteroatom-doped porous carbon material, comprising the steps of:

[0066] 1) Weigh 10g of potassium citrate dihydrate and 0.5g of urea, put them into a mortar and grind evenly until there is no obvious graininess, put the ground mixture in a corundum boat with a size of 10cm*4cm*2cm, and then put the corundum The boat was placed in a tube furnace with a quartz tube diameter of 5 cm. Under the protection of argon, the temperature was raised to 700 °C at a rate of 5 °C / min, kept for 1 hour, and naturally cooled to room temperature to obtain a powder;

[0067] 2) Put the powder obtained in step 1) in a mortar and grind it evenly until there is no obvious graininess, then soak the powder in deionized water and stir for 6 hours according to the ratio of powder and deionized water: 0.1g:50mL, Then vacuum suction filtration, after suction filtration, clean the powder with deionized water and absolute ethanol; repeat the above soaking, ultrasonic, s...

Embodiment 2

[0073] 1. A method for preparing a heteroatom-doped porous carbon material, comprising the steps of:

[0074] 1) Weigh 10g of sodium citrate dihydrate and 1g of thiourea, put them into a mortar and grind evenly until there is no obvious graininess, put the ground mixture in a corundum boat with a size of 10cm*4cm*2cm, and then put the corundum The boat was placed in a tube furnace with a quartz tube diameter of 5 cm. Under the protection of nitrogen, the temperature was raised to 700 °C at a rate of 4 °C / min, kept for 1 h, and naturally cooled to room temperature to obtain a powder;

[0075] 2) Put the powder obtained in step 1) in a mortar and grind it evenly until there is no obvious graininess, and then soak the powder in deionized water for 30 minutes according to the ratio of powder and deionized water: 1g: 1000mL, Then vacuum suction filtration, after suction filtration, clean the powder with deionized water and absolute ethanol; repeat the above soaking, ultrasonic, suc...

Embodiment 3

[0081] 1. A method for preparing a heteroatom-doped porous carbon material, comprising the steps of:

[0082] 1) Weigh 10g of sodium gluconate and 10g of urea, put them into a mortar and grind them evenly until there is no obvious graininess, put the ground mixture in a nickel boat with a size of 10cm*4cm*2cm, and then put the nickel boat in In a tube furnace with a quartz tube diameter of 5 cm, under the protection of nitrogen, the temperature was raised to 400 °C at a rate of 2 °C / min, kept for 5 hours, and naturally cooled to room temperature to obtain a powder;

[0083] 2) Put the powder obtained in step 1) in a mortar and grind it evenly until there is no obvious graininess, then soak the powder in deionized water and stir for 10 hours according to the ratio of powder and deionized water: 1g: 1200mL, and then Vacuum suction filtration, after suction filtration, wash the powder with deionized water and absolute ethanol; repeat the above soaking, ultrasonication, suction fi...

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Abstract

The present invention relates to heteroatom doping porous carbon materials and a preparation method thereof. The preparation method comprises the following steps of: 1) uniformly grinding of citrate dihydrate and urea or thiourea, performing uniform mixing in proportion, putting mixture into a container, rising a temperature to a certain temperature in a tube furnace under the protection of inertgas, performing heat preservation, performing natural cooling to a room temperature, and obtaining powder; 2) uniformly grinding of the powder obtained in the step 1), immersing the powder into deionized water for stirring or ultrasonic processing, performing vacuum filtration or centrifugation, and cleaning the powder by employing the deionized water and absolute ethyl alcohol after vacuum filtration or centrifugation until the filter liquor is close to neutral filter liquor; and 3) performing drying, cooling and uniform grinding of the powder obtained in the step 2), and obtaining the heteroatom doping porous carbon materials. The comby porous carbon materials have good power density, energy density, rate capability and cycle performance, the capacity has almost no attenuation after circulation for 2000 cycles so as to provide a design idea for preparation of the new generation energy storage device electrode materials.

Description

technical field [0001] The invention belongs to the field of preparation of energy storage materials, and in particular relates to a heteroatom-doped porous carbon material and a preparation method thereof. Background technique [0002] At present, with the excessive consumption of fossil fuels and the increasing demand for energy, the development and application of sustainable energy has become the focus of social attention and the focus of scientific research. The efficient storage of electrochemical energy and the conversion and utilization of sustainable resources are by far the two most important ways to obtain sustainable energy. Because supercapacitors can provide high power density, wide operating temperature range, high stability and safety, and longer cycle life than traditional batteries, supercapacitors are considered to be one of the most potential energy storage devices. And it has been widely used in many fields (doi: 10.1039 / b813846j). Therefore, it has gre...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/44H01G11/42H01G11/86
CPCY02E60/13H01G11/24H01G11/42H01G11/44H01G11/86
Inventor 慈立杰李德平彭瑞芹
Owner SHANDONG UNIV
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