Nitrogen-sulfur co-doped biomass derived carbon material and synthesis method and application thereof

A technology of nitrogen-sulfur co-doping and synthesis method, which is applied in the field of nitrogen-sulfur co-doped biomass-derived carbon materials and its synthesis, can solve problems such as low energy density, and achieve improved specific capacitance, uniform product morphology, and synthetic The effect of simple method

Active Publication Date: 2019-07-09
HEFEI UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, supercapacitors have a low energy density (~5Wh kg -1 ), which i

Method used

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  • Nitrogen-sulfur co-doped biomass derived carbon material and synthesis method and application thereof
  • Nitrogen-sulfur co-doped biomass derived carbon material and synthesis method and application thereof
  • Nitrogen-sulfur co-doped biomass derived carbon material and synthesis method and application thereof

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Embodiment 1

[0028] Example 1

[0029] In this example, nitrogen and sulfur co-doped biomass-derived carbon materials were synthesized according to the following steps:

[0030] (1) After the winter bamboo shoot shells were sliced, they were ultrasonically cleaned with deionized water, acetone and ethanol for 20 minutes, then dried in a blast drying oven at 60°C, and then ground into powder in a ball mill (the speed of grinding was 450 rap / min, the time is 8h), obtains the powdery bamboo shoot shell granule, is recorded as Raw-C;

[0031] (2) Add 4g of Raw-C to 400mL of 1mol / L dilute hydrochloric acid in an ice-water bath and stir for 10min; then add 0.02mol of EDOT and continue stirring for 30min; then use a burette to add 40mL of 0.04mol APS dropwise aqueous solution, continue to stir for 12h;

[0032] The obtained product was filtered and cleaned by deionized water, and then dried to obtain a composite carbon precursor, which was recorded as PEDOT@Raw-C;

[0033] (3) Add 1g of PEDOT...

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Abstract

The invention discloses a nitrogen-sulfur co-doped biomass derived carbon material and a synthesis method and an application thereof. The synthesis method comprises the following steps: winter bambooshoot shells (a biological waste) used as a carbon source and a nitrogen source are ball-milled to obtain powdered biomass particles; PEDOT is formed by polymerization on the surface of the biomass particles through in-situ growth by using EDOT as a sulfur source; and finally, the obtained composite is activated by one-step carbonization to obtain the nitrogen-sulfur co-doped biomass derived carbon material. The synthesis method of the invention is simple, and the product obtained has uniform morphology and large specific surface are. The advantages of the biomass materials are combined, and the pseudo capacitive reaction of heteroatoms is introduced, so that the nitrogen-sulfur co-doped biomass derived carbon material has better performance when used as the electrode material of super capacitors.

Description

technical field [0001] The invention belongs to the fields of supercapacitors and nanometer material synthesis, and in particular relates to a nitrogen-sulfur co-doped biomass-derived carbon material and a synthesis method thereof. Background technique [0002] As a new type of energy storage device that combines the advantages of traditional capacitors and secondary batteries, supercapacitors can provide higher energy density than traditional capacitors, as well as better power density and cycle life than secondary batteries, and are expected to be widely used in Energy conversion, aerospace systems, communication engineering and microelectronic devices and other fields. From the perspective of energy storage mechanism, supercapacitors mainly include: electric double layer capacitors with carbon-related materials as electrodes, which rely on charge separation on the surface of electrodes / electrolyte to store energy; polymers and metal oxides as electrodes, relying on electr...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/44H01G11/34H01G11/86
CPCH01G11/24H01G11/30H01G11/34H01G11/44H01G11/86Y02E60/13
Inventor 李强彭程韩军建王嘉琪
Owner HEFEI UNIV OF TECH
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