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Nitrogen-sulfur co-doped layered porous carbon hybrid material prepared from inorganic-cellulose raw material as well as preparation and application thereof

A nitrogen-sulfur co-doping and hybrid material technology is applied in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, etc. The effect of improving electrochemical performance, enhancing power storage capacity, and increasing activity

Active Publication Date: 2021-05-25
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although carbon-based electrode materials have many advantages as electric double layer electroactive materials, they cannot fully meet the needs of technological development due to their small potential window and specific capacitance.

Method used

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  • Nitrogen-sulfur co-doped layered porous carbon hybrid material prepared from inorganic-cellulose raw material as well as preparation and application thereof
  • Nitrogen-sulfur co-doped layered porous carbon hybrid material prepared from inorganic-cellulose raw material as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Combine cellulose with 25% NH 4 Stir and mix in an OH water bath, the temperature of the water bath is 60°C, and the stirring time is 12h;

[0031] (2) Place the ammoniated cellulose obtained by suction filtration and washing in a vacuum drying oven at a drying temperature of 60° C. for 6 hours;

[0032] (3) Take 3g of ammoniated cellulose and 0.3g of ferric sulfate dried in step (2), add 30ml of deionized water to ultrasonic and then hydroheat, the ultrasonic time is 0.5h, the hydrothermal temperature is 180°C, and the hydrothermal time is 24h .

[0033] (4) The hydrothermal product in step (3) is suction-filtered and washed with deionized water and ethanol, and after drying, perform high-temperature pre-carbonization with a tube furnace. The temperature of the pre-carbonization is 500 ° C, and the time is 2 hours;

[0034] (5) Mix the pre-carbonized product in step (4) with KOH and deionized water evenly and then calcined at a high temperature. The mass ratio of...

Embodiment 2

[0040] (1) Combine cellulose with 25% NH 4 Stir and mix in an OH water bath, the temperature of the water bath is 70°C, and the stirring time is 10h;

[0041] (2) Place the ammoniated cellulose obtained by suction filtration and washing in a vacuum drying oven at a drying temperature of 60° C. for 6 hours;

[0042] (3) Take 3g of ammoniated cellulose and 0.3g of ferric sulfate dried in step (2), add 30ml of deionized water to ultrasonic and then hydroheat, the ultrasonic time is 0.5h, the hydrothermal temperature is 180°C, and the hydrothermal time is 24h .

[0043] (4) The hydrothermal product in step (3) is suction-filtered and washed with deionized water and ethanol, and after drying, perform high-temperature pre-carbonization with a tube furnace. The temperature of the pre-carbonization is 500 ° C, and the time is 2 hours;

[0044](5) Mix the pre-carbonized product in step (4) with KOH and deionized water evenly and then calcined at a high temperature. The mass ratio of ...

Embodiment 3

[0049] (1) Combine cellulose with 25% NH 4 Stir and mix in an OH water bath, the temperature of the water bath is 80°C, and the stirring time is 12 hours;

[0050] (2) Place the ammoniated cellulose obtained by suction filtration and washing in a vacuum drying oven at a drying temperature of 60° C. for 6 hours;

[0051] (3) Take 3g of ammoniated cellulose and 0.3g of ferric sulfate dried in step (2), add 30ml of deionized water to ultrasonic and then hydroheat, the ultrasonic time is 0.5h, the hydrothermal temperature is 180°C, and the hydrothermal time is 24h .

[0052] (4) The hydrothermal product in step (3) is suction-filtered and washed with deionized water and ethanol, and after drying, perform high-temperature pre-carbonization with a tube furnace. The temperature of the pre-carbonization is 500 ° C, and the time is 2 hours;

[0053] (5) Mix the pre-carbonized product in step (4) with KOH and deionized water evenly and then calcined at high temperature. The mass ratio...

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Abstract

The invention relates to a nitrogen-sulfur co-doped layered porous carbon hybrid material prepared from an inorganic-cellulose raw material and preparation and application thereof, and the preparation process comprises: stirring and mixing cellulose and ammonia water under a water bath condition, carrying out suction filtration, and washing and drying the obtained product to obtain ammoniated cellulose; adding ammoniated cellulose and ferric sulfate into water, carrying out hydrothermal reaction, and carrying out pre-carbonization treatment to obtain a pre-carbonized product; and uniformly mixing the pre-carbonized product with an activating agent and water, calcining at high temperature, washing and drying to obtain the nitrogen-sulfur co-doped layered porous carbon hybrid material. Compared with the prior art, the invention is advantageous in that a large amount of cellulose existing in the nature is used as a carbon precursor, the cost is saved, the method belongs to a green process, meanwhile, metal elements are doped, the pseudocapacitance performance of the porous carbon material is improved, and the electricity storage capacity of the electrode material is greatly enhanced.

Description

technical field [0001] The invention relates to the technical field of preparation of supercapacitor electrode materials, in particular to a nitrogen-sulfur co-doped layered porous carbon hybrid material prepared from inorganic-cellulose raw materials and its preparation and application. Background technique [0002] Energy has a profound impact on human life. At present, fossil fuels still contribute to most of the world's energy needs, and with the global economic expansion and population explosion, the consumption of fossil fuels such as coal, oil and natural gas has increased dramatically . In recent years, new energy sources such as solar energy, tidal energy, hydraulic energy, wind energy, and biomass energy have been continuously mentioned, researched, and applied. As a new type of energy storage device, supercapacitors have been widely used in consumer electronics, medical equipment and hybrid vehicles because of their high power density and good cycle stability. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/40
CPCH01G11/86H01G11/40Y02E60/13
Inventor 蔺华林李梦琰叶伟林唐意红李欣袁铭霞陈哲严春阳
Owner SHANGHAI INST OF TECH