Biomass-based N, S and P-containing co-doped porous carbon and application thereof

A technology of porous carbon and biomass, which is applied in the manufacture of carbon compounds, hybrid/electric double layer capacitors, inorganic chemistry, etc., can solve the problems of environmental pollution, waste of resources, etc., and achieve the effect of abundant raw materials, low cost, and simple preparation process

Inactive Publication Date: 2017-05-10
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If these wastes are discarded randomly during processing, it will not only waste resources, but also cause environmental pollution.

Method used

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  • Biomass-based N, S and P-containing co-doped porous carbon and application thereof
  • Biomass-based N, S and P-containing co-doped porous carbon and application thereof
  • Biomass-based N, S and P-containing co-doped porous carbon and application thereof

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Experimental program
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Effect test

preparation example Construction

[0034] (5) Preparation of activated carbon electrode: take the prepared activated carbon as the active material, weigh the active material with a mass ratio of 8:1:1, the conductive agent acetylene black, and the binder polytetrafluoroethylene (PTFE) into the agate grinder. Grind in a bowl, grind until viscous, and then apply it on a nickel foam with a diameter of 1 cm. After drying, press it into a flat sheet with a tablet press (pressure 10 MPa).

[0035] (6) Electrochemical performance test: use the electrochemical workstation to test the performance of materials such as cyclic voltammetry, constant current charge and discharge, and AC impedance, and use two-electrode systems and three-electrode systems to measure them in different electrolytes.

[0036] The invention prepares palm shell activated carbon with superior performance under the appropriate alkali-carbon ratio and heating temperature, with a specific surface area of ​​2760 m 2 / g, pore volume up to 1.6 cm 3 / g, ...

Embodiment 1

[0038] (1) Carbonization: Weigh a certain amount of dry palm shell raw materials and place them in a quartz crucible and heat them in a tube furnace. h, take it out after standing to normal temperature, and obtain the black palm shell carbonized material, which is pulverized and sieved for subsequent use.

[0039] (2) Impregnation: According to the alkali-carbon ratio of 3:1, weigh 6 g of activator KOH in a beaker, then weigh 2 g of palm shell carbonized material and mix it with it, add an appropriate amount of distilled water, stir to mix evenly, and place at 100 °C Dry in an oven for activation.

[0040] (3) Activation: During the activation process, the palm shell carbonized material impregnated with KOH is placed in a nickel crucible and placed in a tube furnace, and the mixture is heated to 800 ~ Keep at 1000°C for 1 h.

[0041](4) Washing and drying: After the activation, cool naturally, add 1M hydrochloric acid solution to wash after taking it out, put it in a beaker ...

Embodiment 2

[0045] (1) Carbonization: Weigh a certain amount of dry palm shell raw materials and place them in a quartz crucible and heat them in a tube furnace. h, take it out after standing to normal temperature, and obtain the black palm shell carbonized material, which is pulverized and sieved for subsequent use.

[0046] (2) Impregnation: According to the alkali-carbon ratio of 4:1, weigh 8 g of activator KOH in a beaker, then weigh 2 g of palm shell carbonized material and mix it with it, add an appropriate amount of distilled water, stir to mix evenly, and place at 100 °C Dry in an oven for activation.

[0047] (3) Activation: During the activation process, the palm shell carbonized material impregnated with KOH was placed in a nickel crucible and placed in a tube furnace, and the mixture was heated to 800-800 °C at a rate of 5 °C / min under a nitrogen atmosphere. Keep at 1000°C for 1 h.

[0048] (4) Washing and drying: After activation, cool naturally, add 1 M hydrochloric acid s...

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Abstract

The invention discloses biomass-based N, S and P-containing co-doped porous carbon and an application thereof. The N, S and P-containing co-doped porous carbon is prepared successfully from palm kernel shell serving as a raw material through high-temperature carbonization and an activation method. The palm kernel shell is taken as waste biomass, so that a low-cost carbon source can be provided, and the heteroatoms of N, S and P are provided for a final product; in the presence of the heteroatoms, oxidation reduction pseudo-capacitance is provided; through heteroatom doping, irreversible change of oxygen-containing functional groups on the surface of a carbon material in charging and discharging processes can be suppressed; due to a synergistic effect shown after doping of the elements of N, S and P, the prepared carbon material shows an excellent electrochemical capacitance characteristic, and is a high-quality activated carbon production raw material.

Description

technical field [0001] The invention belongs to the field of carbon material preparation and application, in particular to a biomass-based N, S, P co-doped porous carbon and its application. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are a new type of energy storage element between traditional capacitors and batteries. Because it has the advantages of high power density of ordinary capacitors and high energy density of secondary batteries, it is widely used in many fields such as electric vehicles, mobile communications, aerospace and national defense technology. Among many electrode materials, activated carbon has always been the material of choice for manufacturing electrodes for supercapacitors because of its large specific surface area, stable chemical properties, good electrical conductivity, simple preparation, and low price. At the same time, activated carbon is also an adsorbent material with developed pore structure, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324H01G11/24H01G11/34H01G11/44H01G11/86
CPCY02E60/13H01G11/24C01P2002/72C01P2002/80C01P2002/85C01P2004/03C01P2004/04C01P2006/12C01P2006/14C01P2006/16C01P2006/17C01P2006/40H01G11/34H01G11/44H01G11/86
Inventor 庞欢徐梦娇薛怀国
Owner YANGZHOU UNIV
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