A kind of high-purity and high-conductivity graphene-like hierarchical porous carbon and preparation method thereof

A high-conductivity, graphene technology, applied in the field of new materials, can solve the problems of discontinuous reaction process, high equipment requirements, waste of energy consumption, etc., and achieve the effect of avoiding heat loss, high conductivity, and improving porosity

Active Publication Date: 2020-10-09
高彪峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires a high temperature above 2000°C, high energy consumption, high equipment requirements, and discontinuous reaction process, resulting in waste of energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix petroleum coke, potassium hydroxide, and ferric nitrate at a molar ratio of 1:3:0.05, put them into a nickel crucible, then place them in a high-temperature atmosphere furnace, feed 200ccm of nitrogen, and raise the temperature to 850°C at 2°C / min Keep warm for 1h, then add 30ccm of chlorine gas, raise the temperature to 1350°C at 5°C / min, and keep it warm for 4h, stop feeding chlorine gas (continue to feed nitrogen gas), and naturally cool down to room temperature, and immerse the obtained product in 0.05M HCl solution After 1h, take it out and wash it with deionized water to neutrality, and bake it in an oven at 80°C for 8h to obtain an ash content of 0.06%, an electrical conductivity of 10S / cm, and a specific surface area of ​​1370m 2 / g graphene-like hierarchical porous carbon.

Embodiment 2

[0023] Mix pitch coke, sodium oxide, and nickel chloride at a molar ratio of 1:3:0.02, put them into a nickel crucible, and then place them in a high-temperature atmosphere furnace, inject 600ccm of nitrogen gas, and raise the temperature to 750°C at 2°C / min Keep warm for 2h, then add 60ccm of chlorine gas, raise the temperature to 1550°C at 5°C / min, keep warm for 2h, stop feeding chlorine gas (continue to feed nitrogen gas), and let it cool down to room temperature naturally, then immerse the obtained product in 0.1M HCl solution After 0.5h, take it out and wash it with deionized water to neutrality, put it in a vacuum oven at 100°C for 4h, and get an ash content of 0.09%, a Franklin P value of 0.404, and a specific surface area of ​​1150m 2 / g graphene-like hierarchical porous carbon.

Embodiment 3

[0025] Mix coal char and nickel chloride at a molar ratio of 1:0.02, put them into a nickel crucible, and then place them in a high-temperature atmosphere furnace, and feed 600ccm of nitrogen and 45ccm of CO 2 , and heated at 10°C / min to 700°C for 5h, then stopped feeding CO 2 , add 20ccm of chlorine gas, raise the temperature to 1650°C at 10°C / min, and keep it warm for 2h, stop feeding chlorine gas (continue to feed nitrogen gas), and naturally cool down to room temperature, and immerse the obtained product in 0.5M HNO 3 in the solution for 0.5h, then take it out and wash it with deionized water until it is neutral, put it in a vacuum oven at 100°C for 2h, and obtain an ash content of 0.045%, a Franklin P value of 0.37, and a specific surface area of ​​850m 2 / g graphene-like hierarchical porous carbon.

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Abstract

The invention discloses high-purity high-conductivity graphene graded porous carbon and a preparation method thereof. A substance with a high carbon content serves as a precursor, and direct pore-forming, catalytic graphitization and / or post-treatment are performed in atmosphere to obtain the high-purity high-conductivity graphene graded porous carbon. According to the preparation method, continuous heating is performed, steps are closely linked, heat loss caused by poor step linking in a conventional method is avoided, and continuous and large-scale production is easily performed. The prepared carbon material has high specific surface area, pore diameter controllability and the like, a carbon framework is a graphene structure facilitating electronic conduction, double properties of high mass transfer and high conduction can be taken into account, and the carbon framework has the advantages of good heat vibration resistance, strong mechanical strength and the like. The carbon materialcan be applied to the field of efficient heat dissipation, electrode materials, conductive agents, catalyst carriers and the like.

Description

technical field [0001] The invention relates to a high-purity and high-conductivity graphene-like hierarchical porous carbon and a preparation method thereof, belonging to the field of new materials. Background technique [0002] Porous carbon has the characteristics of large specific surface area, controllable pore structure and interface properties, and good chemical stability, and its electrical conductivity can realize the transformation from semiconductor to superconductor. It is used in new energy, environmental protection, gas separation and storage, drug carrier, Catalyst carrier and other fields. However, the high porosity and high electronic conductivity of porous carbon are difficult to unify on the same porous carbon material. For example, the conductivity of commercial activated carbon materials with high porosity is about 4us / m, and the conductivity of various porous carbon materials reported in the literature is basically <100us / m; while the high conductiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05
CPCC01B32/05
Inventor 高彪峰谷保祥张继伟陈锋刘碧波刘帅霞陈晓阳孙哲邓元鑫
Owner 高彪峰
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