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Preparation method of nitrogen and oxygen in-situ doped porous carbon electrode material and application thereof

An electrode material, porous carbon technology, applied in the field of electrochemical energy storage, can solve the problems affecting the performance of supercapacitor energy density, low specific surface utilization, etc., to achieve excellent mass transfer performance, promote charge storage, and optimize charge capacity. Effect

Active Publication Date: 2016-05-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, activated carbon materials have the problem of low specific surface utilization, which seriously affects their performance in supercapacitor energy density.

Method used

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  • Preparation method of nitrogen and oxygen in-situ doped porous carbon electrode material and application thereof
  • Preparation method of nitrogen and oxygen in-situ doped porous carbon electrode material and application thereof
  • Preparation method of nitrogen and oxygen in-situ doped porous carbon electrode material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Wash and clean the yellow ox bone, crush it into bone powder and dry it in an oven, then place it in a tube furnace, at a flow rate of 200mLmin -1 Under the protection of high-purity argon, with 5 oC min -1 Warm up to 400 o C carbonization, after 3 hours of heat preservation, stop heating, cool naturally to room temperature, and obtain a pre-carbonized product; weigh 5 g of the pre-carbonized product and activator KOH in a mass ratio of 1:1, grind and mix them evenly, and put them into a tube furnace. 2.5 oC min -1 Warm up to 750 o C. Cool down to room temperature naturally after heat preservation for 1h to obtain the activated carbonized product; then place the above activated carbonized product in 2molL -1 HNO 3 Stir and pickle in the solution for 12h, then wash with deionized water, 110 o After C drying for 12 hours, the porous carbon material CB-HPC-750 co-doped with nitrogen and oxygen was obtained. The pores showed a three-dimensional honeycomb network stru...

Embodiment 2

[0037] Pre-carbonization adopts the preparation process of Example 1, weighs 5g of pre-carbonized product and activator KOH, grinds and mixes them evenly in a mass ratio of 1:1, and puts them into a tube furnace. oC min -1 Warm up to 850 o C. Cool down to room temperature naturally after heat preservation for 1h to obtain the activated carbonized product; then place the above activated carbonized product in 2molL -1 HNO 3 Stir and pickle in the solution for 12h, then wash with deionized water, 110 o After C drying for 12 hours, the porous carbon material CB-HPC-850 co-doped with nitrogen and oxygen was obtained. The pores of the material showed a three-dimensional honeycomb network structure, including macropores, mesopores, and micropores. The scanning electron microscope showed figure 2 , through the nitrogen isothermal adsorption and desorption test, the specific surface area of ​​the porous carbon reached 2520m2 by BET fitting 2 g -1 Adopting X-ray photoelectron spec...

Embodiment 3

[0039] Pre-carbonization adopts the preparation process of Example 1, weighs 5g of pre-carbonized product and activator KOH, grinds and mixes them evenly in a mass ratio of 1:1, and puts them into a tube furnace. oC min -1 Warm up to 950 o C. Cool down to room temperature naturally after heat preservation for 1h to obtain the activated carbonized product; then place the above activated carbonized product in 2molL -1 HNO 3 Stir and pickle in the solution for 12h, then wash with deionized water, 110 o After C drying for 12 hours, the porous carbon material CB-HPC-950 co-doped with nitrogen and oxygen was obtained. Through the nitrogen isothermal adsorption and desorption test, the specific surface area of ​​the porous carbon reached 1123m2 by BET fitting. 2 g -1 ; The oxygen content measured by X-ray photoelectron spectroscopy is 9.2wt%, and the nitrogen content is 1.01wt%.

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Abstract

The invention relates to a preparation method of nitrogen and oxygen in-situ codoped porous carbon electrode material and an application thereof. The nitrogen and oxygen in-situ codoped porous carbon electrode material is excellent in conductivity, great in chemical stability, three-dimensional and abundant in pore channels. An animal bone, such as an ox bone, a swine bone and a goat bone, is adopted to act as a carbon precursor. The organic component of collagen in the bone acts as a carbon and nitrogen source, and the inorganic component acts as a natural template to act as supporting material in the carbonization process and a pore channel regulating structure for controlling change and size of hydroxyapatite crystals so that the material is prepared. The porous carbon electrode material is abundant and prosperous in pore structures and has micropores, mesopores and macropores with the specific surface of being 1000-3000m<2>g<-1> so that the porous carbon electrode material can be used as supercapacitor electrode material.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and in particular relates to a method for preparing a nitrogen-oxygen in-situ co-doped porous carbon material and its application as an electrode material for a supercapacitor. Background technique [0002] Energy is the most basic driving force for the survival and development of human beings in the new century. However, with the depletion of fossil fuels and the intensification of environmental pollution, advanced energy conversion and storage technology is one of the major problems that the world needs to solve urgently. common problems. With the discovery and utilization of more new energy sources such as solar energy, wind energy, tidal energy, and biomass energy, people need an energy storage device to store and convert these energy sources. Among the many energy storage devices, batteries and supercapacitors are the two most commonly used and most widely used options. Batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/32H01G11/86
CPCY02E60/13H01G11/26H01G11/32H01G11/86
Inventor 王峰何端鹏窦美玲吉静刘景军李志林宋夜刘海静
Owner BEIJING UNIV OF CHEM TECH
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