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

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

Active Publication Date: 2018-03-30
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

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Experimental program
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Effect test

Embodiment 1

[0035] Wash the ox bones, pulverize them into bone powder and place them in an oven for drying, then place them in a tube furnace at a flow rate of 200 mL min -1 Under the protection of high-purity argon, with 5 oC min -1 Heat up to 400 o C carbonization, heat preservation for 3h, stop heating, cool to room temperature naturally, obtain pre-carbonized product; weigh 5g pre-carbonized product and activator KOH according to the mass ratio of 1:1, grind and mix uniformly into the tube furnace, under the protection of argon 2.5 oC min -1 Heat up to 750 o C, after holding for 1 hour, cool to room temperature naturally to obtain activated carbonized product; then put the above activated carbonized product in 2mol L -1 HNO 3 Stir and pickle in the solution for 12h, then wash with deionized water, 110 o After drying in C for 12 hours, a porous carbon material CB-HPC-750 co-doped with nitrogen and oxygen is obtained. The pores present a three-dimensional honeycomb network structure,...

Embodiment 2

[0037] Pre-carbonization adopts the preparation process of Example 1. Weigh 5g of pre-carbonization product and activator KOH according to a mass ratio of 1:1, grind and mix them evenly into the tube furnace, under the protection of argon at 2.5 oC min -1 Heat up to 850 o C, after holding for 1 hour, cool to room temperature naturally to obtain activated carbonized product; then put the above activated carbonized product in 2 mol L -1 HNO 3 Stir and pickle in the solution for 12h, then wash with deionized water, 110 o After drying in C for 12 hours, a porous carbon material CB-HPC-850 doped with nitrogen and oxygen is obtained. The pores of the material present a three-dimensional honeycomb network structure, including macropores, mesopores, and micropores. figure 2 , Through the nitrogen isothermal adsorption and desorption test, the specific surface area of ​​porous carbon reached 2520 m using BET fitting 2 g -1 ; Using X-ray photoelectron spectroscopy, the oxygen content i...

Embodiment 3

[0039] Pre-carbonization adopts the preparation process of Example 1. Weigh 5g of pre-carbonization product and activator KOH according to a mass ratio of 1:1, grind and mix them evenly into the tube furnace, under the protection of argon at 2.5 oC min -1 Heat up to 950 o C, after holding for 1 hour, cool to room temperature naturally to obtain activated carbonized product; then put the above activated carbonized product in 2 mol L -1 HNO 3 Stir and pickle in the solution for 12h, then wash with deionized water, 110 o After drying in C for 12 hours, a porous carbon material CB-HPC-950 co-doped with nitrogen and oxygen was obtained. The specific surface area of ​​porous carbon reached 1123 m through nitrogen isothermal adsorption and desorption test and BET fitting. 2 g -1 ; Using X-ray photoelectron spectroscopy, the oxygen content is 9.2 wt%, and the nitrogen content is 1.01 wt%.

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Abstract

The invention relates to a preparation method and application of a nitrogen and oxygen in-situ co-doped porous carbon electrode material with excellent conductivity, good chemical stability, three-dimensionality and rich channels. Animal bones are used, such as bovine bones, pig bones, Sheep bone is used as a carbon precursor, the organic component collagen in the bone is used as a carbon and nitrogen source, and the inorganic component is used as a natural template, which is used as a supporting material during the carbonization process and controls the change of hydroxyapatite crystals and the size of the pore structure. The porous carbon electrode material has a rich and developed pore structure, contains micropores, mesopores, and macropores, and has a specific surface area of ​​1000-3000 m2 g-1, and can be used as an electrode material for supercapacitors.

Description

Technical field [0001] The invention belongs to the field of electrochemical energy storage, and specifically relates to a preparation method of a nitrogen and oxygen in-situ co-doped porous carbon material and its application as a super capacitor electrode material. Background technique [0002] Energy is the most basic power support for human survival and development in the new century. However, with the exhaustion 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. How to develop a green and sustainable new energy in the future is currently facing the world. Common problem. With the discovery and utilization of more new energy sources such as solar energy, wind energy, tidal energy, biomass energy, etc., people need an energy storage device to store and convert these energy sources. Among many energy storage devices, batteries and supercapaci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/26H01G11/32H01G11/86
CPCY02E60/13
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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