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A kind of three-dimensional ordered mesoporous cobalt nitride and its preparation method and application

A three-dimensional ordered, cobalt nitride technology, applied in the field of inorganic porous materials and energy science, can solve the problems of poor ion transport capacity, less active sites, and low specific surface area, and achieve improved electrochemical performance, simple preparation method, The effect of easy access to raw materials

Active Publication Date: 2021-08-24
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The third technical problem to be solved by the present invention is: for lithium-ion battery electrode materials facing the problems of low specific surface area, few active sites, poor conductivity and poor ion transport ability, the prepared three-dimensional ordered mesoporous CoN is used as the electrode material , improve the capacity, cycle stability and rate performance of lithium-ion batteries, and promote the practical application of three-dimensional ordered mesoporous CoN as electrode materials

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  • A kind of three-dimensional ordered mesoporous cobalt nitride and its preparation method and application
  • A kind of three-dimensional ordered mesoporous cobalt nitride and its preparation method and application
  • A kind of three-dimensional ordered mesoporous cobalt nitride and its preparation method and application

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Embodiment 1

[0035] A three-dimensional ordered mesoporous cobalt nitride, the mesoporous structure presents regular and ordered characteristics, and is a uniform and controllable three-dimensional ordered pore.

[0036] Preparation method: (1) Put 10g of P 123, 16.75mL of concentrated hydrochloric acid with a concentration of 37%, and 362mL of ultrapure water into a beaker, stir at 35°C until completely dissolved, then add 12.35mL of n-butanol and stir for 1h , add 23.12mL tetraethyl orthosilicate and stir for 24h to get the mixture, hydrothermally treat the resulting mixture at 100°C for 24h to get a precipitate, finally wash the obtained precipitate, dry and put in the muffle furnace under the air at 2°C / min Rise to 500°C and keep for 3 hours to obtain ordered mesoporous silica;

[0037](2) At room temperature, put 0.84 g of cobalt nitrate into 3 mL of ethanol, stir until completely dissolved to obtain an ethanol solution, weigh 0.5 g of pre-synthesized ordered mesoporous silica in step...

Embodiment 2

[0042] A three-dimensional ordered mesoporous cobalt nitride, the mesoporous structure presents regular and ordered characteristics, and is a uniform and controllable three-dimensional ordered pore.

[0043] Preparation method: (1) Put 10g of P 123, 16.75mL of concentrated hydrochloric acid with a concentration of 37%, and 362mL of ultrapure water into a beaker, stir at 35°C until completely dissolved, then add 12.35mL of n-butanol and stir for 1h , add 23.12mL tetraethyl orthosilicate and stir for 24h to obtain a mixture, hydrothermally treat the obtained mixture at 100°C for 24h to obtain a precipitate, finally wash the obtained precipitate, dry it and raise it to 500°C at 2°C / min under the air to keep 3h, the ordered mesoporous silica is obtained;

[0044] (2) At room temperature, put 0.55 g of cobalt nitrate into 5 mL of ethanol, stir until completely dissolved to obtain an ethanol solution, weigh 0.5 g of pre-synthesized ordered mesoporous silica in step (1) as a template...

Embodiment 3

[0048] A three-dimensional ordered mesoporous cobalt nitride, the mesoporous structure presents regular and ordered characteristics, and is a uniform and controllable three-dimensional ordered pore.

[0049] Preparation method: (1) Put 10g of P 123, 16.75mL of concentrated hydrochloric acid with a concentration of 37%, and 362mL of ultrapure water into a beaker, stir at 35°C until completely dissolved, then add 12.35mL of n-butanol and stir for 1h , add 23.12mL tetraethyl orthosilicate and stir for 24h to get the mixture, hydrothermally treat the resulting mixture at 100°C for 24h to get a precipitate, finally wash the obtained precipitate, dry and put in the muffle furnace under the air at 2°C / min Rise to 500°C and keep for 3 hours to obtain ordered mesoporous silica;

[0050] (2) At room temperature, put 1.1 g of cobalt nitrate into 4 mL of ethanol, stir until completely dissolved to obtain an ethanol solution, weigh 0.5 g of pre-synthesized mesoporous silica in step (1) as ...

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Abstract

The invention discloses a three-dimensional ordered mesoporous cobalt nitride and its preparation method and application. The ordered mesoporous cobalt nitride has a uniform and controllable three-dimensional ordered aperture, a high specific surface area and a good conductive framework, and the preparation method The method comprises the following steps: S1, using tetraethyl orthosilicate as a raw material, using polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer as a template, and hydrothermally synthesizing orderly under acidic conditions Mesoporous silica; S2, using the ordered mesoporous silica prepared in S1 as a template, using cobalt nitrate as a precursor, and using solvent volatilization to induce filling; S3, performing high-temperature crystallization on the sample obtained in S2, and selecting The ordered mesoporous cobalt nitride can be obtained by permanent etching and nitridation. When ordered mesoporous cobalt nitride is used as an electrode material for lithium-ion batteries, the material forms a good contact interface with the electrolyte, which effectively promotes the rapid transport of electrons and ions, buffers the volume expansion effect of the lithium-ion intercalation process, and realizes lithium-ion batteries. performance improvement.

Description

technical field [0001] The invention belongs to the field of inorganic porous materials and energy science and technology, and relates to a three-dimensional ordered mesoporous cobalt nitride and its preparation method and application. Background technique [0002] Cobalt nitride (CoN) material is a kind of transition metal nitride with magnetic properties, excellent catalytic performance and good electrical conductivity. It has broad application prospects in the fields of electromagnetic, chemical and energy storage. However, CoN synthesized by conventional methods has low pore size and low specific surface area, which limits its further performance. Ordered mesoporous materials have the advantages of high specific surface area, uniform pore size, regular morphology and adjustable periodic pore structure. Therefore, the construction of ordered mesoporous CoN can effectively solve the above problems, which is of great significance. [0003] However, the synthesis of nitrid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/06H01M4/58H01M10/0525
CPCC01B21/0622C01P2004/03C01P2004/04C01P2006/12C01P2006/14C01P2006/17C01P2006/40H01M4/58H01M10/0525Y02E60/10
Inventor 王洪强姜广申韩浩杰徐飞
Owner NORTHWESTERN POLYTECHNICAL UNIV