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Nitrogen-sulfur-doped nano-porous carbon material taking sodium alginate as raw material and preparation method of nitrogen-sulfur-doped nano-porous carbon material

A technology of nanoporous carbon and sodium alginate, which is applied in the direction of nanocarbon, nanotechnology, carbon compounds, etc., and can solve problems such as hindering practical application, poor rate performance and cycle stability

Pending Publication Date: 2021-05-14
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that metal sulfides are promising electrode materials, which not only have high specific capacitance but also high specific power density, however, the rate performance and cycle stability of such materials are poor, hindering their practical application

Method used

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  • Nitrogen-sulfur-doped nano-porous carbon material taking sodium alginate as raw material and preparation method of nitrogen-sulfur-doped nano-porous carbon material
  • Nitrogen-sulfur-doped nano-porous carbon material taking sodium alginate as raw material and preparation method of nitrogen-sulfur-doped nano-porous carbon material
  • Nitrogen-sulfur-doped nano-porous carbon material taking sodium alginate as raw material and preparation method of nitrogen-sulfur-doped nano-porous carbon material

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Experimental program
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Effect test

Embodiment 1

[0028] A preparation method of nitrogen-sulfur-doped nanoporous carbon material using sodium alginate as raw material, comprising the following steps:

[0029] 1) Slowly dissolve 2g of sodium alginate powder in 60ml of deionized aqueous solution containing 0.5g of thiourea, continue stirring and heating to form a solution;

[0030] 2) Add 3.91g of calcium acetate to 20ml of deionized water, slowly drop into sodium alginate thiourea solution to form a gel, and keep stirring for 1h;

[0031] 3) The gel in step 2) is freeze-dried and pulverized, and pre-frozen with liquid nitrogen before freeze-drying;

[0032] 4) Activate the sample in step 3) by high-temperature carbonization, and then wash and dry it with hydrochloric acid and deionized water to obtain a nitrogen-sulfur-doped nanoporous carbon material prepared by a freeze-drying assisted carbonization template method, wherein the carbonization temperature is 600 ° C, The drying time is 2 hours, the drying temperature is 60° ...

Embodiment 2

[0038] A preparation method of nitrogen-sulfur-doped nanoporous carbon material using sodium alginate as raw material, comprising the following steps:

[0039] 1) Slowly dissolve 2g of sodium alginate powder in 60ml of deionized aqueous solution containing 0.6g of thiourea, continue stirring and heating to form a solution;

[0040] 2) Add 3.91g of calcium acetate to 20ml of deionized water, slowly drop into sodium alginate thiourea solution to form a gel, and keep stirring for 1 hour;

[0041] 3) The gel in step 2) is freeze-dried and pulverized, and pre-frozen with liquid nitrogen before freeze-drying;

[0042] 4) Activate the sample in step 3) by high-temperature carbonization, and then wash and dry it with hydrochloric acid and deionized water to obtain a nitrogen-sulfur-doped nanoporous carbon material prepared by a freeze-drying assisted carbonization template method, wherein the carbonization temperature is 600 ° C, The drying time is 5 hours, the drying temperature is ...

Embodiment 3

[0045] A preparation method of nitrogen-sulfur-doped nanoporous carbon material using sodium alginate as raw material, comprising the following steps:

[0046] 1) Slowly dissolve 2g of sodium alginate powder in 60ml of deionized aqueous solution containing 0.6g of thiourea, continue stirring and heating to form a solution;

[0047] 2) Add 3.91g of calcium acetate to 20ml of deionized water, slowly drop into sodium alginate thiourea solution to form a gel, and keep stirring for 1 hour;

[0048] 3) The gel in step 2) is freeze-dried and pulverized, and pre-frozen with liquid nitrogen before freeze-drying;

[0049] 4) Activate the sample in step 3) by high-temperature carbonization, and then wash and dry it with hydrochloric acid and deionized water to obtain a nitrogen-sulfur-doped nanoporous carbon material prepared by a freeze-drying assisted carbonization template method, wherein the carbonization temperature is 700 ° C, The drying time is 3 hours, the drying temperature is ...

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Abstract

The invention relates to a nitrogen-sulfur-doped nano porous carbon material with sodium alginate as a raw material and preparation thereof. The preparation method comprises the following steps of: 1, dissolving sodium alginate in a thiourea aqueous solution, and performing stirring and heating to obtain a sodium alginate thiourea solution; 2) dropwise adding a calcium salt aqueous solution into the sodium alginate thiourea solution, and stirring to obtain gel; and 3) freeze-drying the gel in the step 2), crushing, performing high-temperature carbonization activation, washing, and drying to obtain the nitrogen-sulfur doped nano porous carbon material. The nitrogen and sulfur doped nano porous carbon material is used in a supercapacitor. Compared with the prior art, the nitrogen-sulfur-doped nano-porous carbon material is prepared by taking sodium alginate which is rich in natural content as a carbon precursor and adopting a freeze-drying auxiliary carbonization template method, so that the cost is saved, the environment is protected, the process is simple, the pseudocapacitance, the conductivity, the power density and the cycling stability are enhanced, and the nitrogen-sulfur-doped nano-porous carbon material has excellent electrochemical performance, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrode materials for supercapacitors, and relates to a nitrogen-sulfur-doped nanoporous carbon material for supercapacitors using sodium alginate as a raw material and its preparation. Background technique [0002] The rapid development of global industry and economy and the rapid growth of population have accelerated the consumption of fossil fuels, resulting in the depletion of non-renewable energy sources and the deterioration of the ecological environment. Therefore, it is urgent to find a high-efficiency, clean and renewable energy source, and New technologies related to energy conversion and storage. Although solar energy and wind energy can provide renewable energy, they cannot meet people's demand for stable energy for the time being. Therefore, how to store these clean energy in time and release it when needed has become an important research topic in the field of energy applica...

Claims

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Application Information

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IPC IPC(8): C01B32/318C01B32/15B82Y40/00H01G11/44H01G11/34H01G11/36H01G11/24
CPCC01B32/318C01B32/15B82Y40/00H01G11/44H01G11/34H01G11/36H01G11/24Y02E60/13
Inventor 蔺华林李梦琰杨洋王云云李欣袁铭霞陈哲严春阳
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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