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a co 9 the s 8 Nanoparticle composite electrode material and its preparation method and application

A composite electrode and nanoparticle technology, used in hybrid capacitor electrodes, nanotechnology, battery electrodes, etc., can solve the problems of complex synthesis process, high price, scarcity of materials, etc., and achieve simple preparation process, enhanced conductivity, and increased material surface area. Effect

Active Publication Date: 2021-06-15
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrode materials based on noble metals are facing the problems of scarcity and high price, and the composite structure is also facing the problem of high construction cost (such as graphene, MOF) and complex synthesis process.

Method used

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  • a co <sub>9</sub> the s <sub>8</sub> Nanoparticle composite electrode material and its preparation method and application
  • a co <sub>9</sub> the s <sub>8</sub> Nanoparticle composite electrode material and its preparation method and application
  • a co <sub>9</sub> the s <sub>8</sub> Nanoparticle composite electrode material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 High temperature treatment of vermiculite + step-by-step impregnation method

[0044] (1) Grind the commercial expanded vermiculite fully through a 200-mesh sieve in a mortar, and collect the product under the sieve (<100 μm) as the finely ground vermiculite;

[0045] (2) Weigh 0.51 g of the finely ground vermiculite prepared in step (1), raise the temperature to 900°C in the air at a heating rate of 5°C / min, keep the temperature at a constant temperature for 2 hours, and cool naturally to obtain high-temperature treated vermiculite;

[0046] (3) Weigh 10g of sucrose to prepare a 9.6% sucrose solution as impregnation solution A; place the high-temperature-treated vermiculite prepared in step (2) in 50mL of impregnation solution A for 24 hours, and centrifuge after the impregnation is completed. , keep the lower layer product and dry at 105°C for 12h; after drying, in an inert gas N 2 Under the atmosphere, the temperature was raised at 2°C / min at a constant te...

Embodiment 2

[0052] Embodiment 2 grinds fine vermiculite+step-by-step impregnation method

[0053] (1) Grind the commercial expanded vermiculite fully through a 200-mesh sieve in a mortar, and collect the product under the sieve (<100 μm) as the finely ground vermiculite;

[0054] (2) Weigh 10g of sucrose to prepare a 9.6% sucrose solution by mass as impregnating solution A; place 0.51g of the finely ground vermiculite prepared in step (1) in 50mL of impregnating solution A for 24 hours. Centrifuge, keep the lower layer product and dry at 105°C for 12h; after drying, in an inert gas N 2 Under the atmosphere, the temperature was raised at 2°C / min at a constant temperature of 600°C for 3 hours, and naturally cooled to obtain carbon-coated vermiculite;

[0055] (3) Weigh 0.48g of cobalt chloride hexahydrate, 0.3g of thiourea and 12g of urea according to the molar ratio of 1:2:100 to prepare 100ml of impregnation solution B. In the impregnation solution B, cobalt chloride hexahydrate and thio...

Embodiment 3

[0059] Example 3 Acid treatment of vermiculite+step-by-step impregnation method

[0060] (1) Grind the commercial expanded vermiculite fully through a 200-mesh sieve in a mortar, and collect the product under the sieve (<100 μm) as the finely ground vermiculite;

[0061] (2) Weigh 0.51g of the finely ground vermiculite prepared in step (1), stir it with 200mL of 2mol / L hydrochloric acid at 80°C for 24 hours, filter it, wash it with water until it is neutral, and dry it at 70°C to obtain the acid-treated vermiculite ;

[0062] (3) Weigh 10g of sucrose to prepare a 9.6% sucrose solution by mass as impregnating solution A; place the hydrochloric acid-treated vermiculite prepared in step (2) in 50mL of impregnating solution A for 24 hours, and then centrifuge , keep the lower layer product and dry at 105°C for 12h; after drying, in an inert gas N 2 Under the atmosphere, the temperature was raised at 2°C / min at a constant temperature of 600°C for 3 hours, and naturally cooled to ...

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Abstract

The invention belongs to the technical field of electrode materials, in particular to a Co 9 S 8 Nanoparticle composite electrode material and its preparation method and application. In the present invention, the ground vermiculite or the pretreated ground vermiculite is immersed in the impregnation solution A containing sucrose and calcined to obtain the carbon-coated vermiculite; then the carbon-coated vermiculite is placed in Cobalt, thiourea, and urea impregnation solution B impregnated and calcined to obtain Co 9 S 8 Nanoparticle composite electrode materials. This method employs the impregnation method to in situ grow Co on two-dimensional layered vermiculite. 9 S 8 Nanoparticles, the preparation process is simple, low energy consumption and easy to operate, not only maintain the two-dimensional layered structure of vermiculite itself, increase the surface area of ​​the material, but also use sucrose as the carbon source to coat the surface of the nanoparticles, which enhances the conductivity of the electrode material ; In addition, thiourea and urea are used as sulfur source and nitrogen source to form double heteroatom N, S co-doping, which further enhances the electrochemical performance of the material.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, in particular to a Co 9 S 8 Nanoparticle composite electrode material and its preparation method and application. Background technique [0002] The energy shortage and environmental pollution caused by the use of fossil fuels make people focus on the storage and conversion of clean and renewable energy. At present, some renewable energy sources (solar energy, wind energy, biomass energy) have gradually replaced oil and natural gas, but they still have intermittent and uneven distribution. How to convert these intermittent energy sources into storable modes (such as electric energy ) is the crux of the problem. In addition, the rapid development of industries such as portable electronic devices and electric vehicles has set higher standards for energy storage and output capabilities. Driven by many factors, supercapacitors stand out for their unique advantages of fast charging and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/00
CPCB82Y30/00B82Y40/00C01B33/26C01G51/30C01P2002/72C01P2004/02C01P2004/61C01P2004/80C01B32/05H01G11/30H01M4/5815Y02E60/10
Inventor 王芳于海峰高亚辉冯婷孔德升
Owner LUOYANG INST OF SCI & TECH
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