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A kind of preparation method of porous carbon electrode material

A porous carbon electrode and carbonization technology, which is applied to conductive materials dispersed in non-conductive inorganic materials, battery electrodes, hybrid capacitor electrodes, etc., can solve the problems of low yield of mesoporous carbon products and difficulty in industrialized production. Achieve the effects of lowering the carbonization temperature, lowering the cost of raw materials, and enriching nanopores

Active Publication Date: 2022-03-29
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above methods all need to adjust the pore structure of carbon materials through templates, and the yield of mesoporous carbon products is low, making it difficult to realize industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] A preparation method of a porous carbon electrode material, comprising:

[0026] 1) Weigh a certain molar ratio of tartrate and manganese salt, dissolve in water, stir vigorously for 2 hours, react the obtained product at 180°C for 10 hours; then wash and dry the obtained product;

[0027] 2) Mix the product of step 1) with a nitrogen source in a certain proportion, disperse it in water, react the obtained product at 180° C. for 5 hours; then wash and dry the obtained product, and heat-treat the dried product at 600° C. for 5 hours in an inert atmosphere;

[0028] 3) Mix the product of step 2) with a sulfur source in a certain proportion, disperse it in water, react the obtained product at 180°C for 5 hours; then wash and dry the obtained product, and anneal the dried product at 600°C for 2 hours to obtain Porous carbon electrode material.

[0029] A compositional design of a porous carbon electrode material comprising:

[0030] 1) The molar ratio of manganese chlorid...

example 2

[0033] The operation is the same as example 1.

[0034] A compositional design of a porous carbon electrode material comprising:

[0035] 2) The molar ratio of manganese nitrate and sodium ammonium tartrate is 1.1:1; biuret is 8wt% of the mass percent of carbonized product of manganese nitrate and sodium ammonium tartrate; methylthiourea is 8wt% of the mass percent of carbonized product of manganese nitrate and sodium ammonium tartrate. 12wt%;

[0036] The porous carbon electrode material and selenium powder were uniformly mixed at a mass ratio of 3.5:6.5 and ball milled for 6 hours. The ball milled product was annealed in a tube furnace at 300° C. for 6 hours to obtain a nitrogen-doped porous carbon-loaded selenium electrode material. The charge and discharge voltage range is 1 to 3V, the current density is 200mA / g, and the discharge specific capacity of the porous carbon-loaded selenium electrode material is greater than 400mAh / g after 50 cycles, which is much larger than t...

example 3

[0038] The operation is the same as example 1.

[0039] A compositional design of a porous carbon electrode material comprising:

[0040] 3) The molar ratio of manganese bromide and potassium sodium tartrate is 0.9:1; N-methylurea is 15wt% of the mass percentage of the carbonization product of manganese nitrate and ammonium sodium tartrate; ethylthiourea is the carbonization product of manganese bromide and potassium sodium tartrate 9wt% of product mass percent;

[0041] The porous carbon electrode material and selenium powder were uniformly mixed at a mass ratio of 3.5:6.5 and ball milled for 6 hours. The ball milled product was annealed in a tube furnace at 300° C. for 6 hours to obtain a nitrogen-doped porous carbon-loaded selenium electrode material. The charge and discharge voltage range is 1 to 3V, the current density is 200mA / g, and the discharge specific capacity of the porous carbon-loaded selenium electrode material is greater than 400mAh / g after 50 cycles, which is...

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Abstract

The invention discloses a method for preparing a porous carbon electrode material. The porous carbon electrode material is prepared by using manganese salt and tartrate as raw materials, hydrothermal reaction carbonization, and nitrogen and sulfur doping; the manganese salt is manganese chloride, manganese bromide, A kind of manganese nitrate; tartrate is a kind of sodium potassium tartrate, sodium ammonium tartrate, sodium antimony tartrate; nitrogen source is urea, biuret, N-methylurea, N-ethylurea, N-propylurea , a kind of in N-isopropylurea; Sulfur source is a kind of of thiourea, methylthiourea, ethylthiourea, propylthiourea, butylthiourea; The mol ratio of manganese salt and tartrate is 0.8-1.2; the nitrogen source is 0-20wt% of the mass percentage of the porous carbon electrode material; the sulfur source is 0-15wt% of the mass percentage of the porous carbon electrode material. After the porous carbon is combined with selenium, sulfur, silicon and other electrode materials, it exhibits very good lithium storage performance and has a good application prospect. The preparation process of the porous carbon electrode material is simple and controllable, the operation is convenient, and it is suitable for industrial production.

Description

technical field [0001] The patent of the present invention relates to a preparation method of an electrode material, in particular to a preparation method of a porous carbon electrode material. Background technique [0002] Carbon materials have the characteristics of high conductivity, good hydrothermal stability, large relative area and porous structure, and are widely used in new energy devices such as lithium-ion batteries and supercapacitors; Electrochemical properties of materials. [0003] Gao et al. used seaweed as raw material, first carbonized at 500°C, then mixed the product with sodium aluminate, and reacted at 500-900°C to obtain a 1-2 nanometer microporous-mesoporous carbon material, which has a BET specific surface area and pores The volume reaches 1374m 2 / g and 1.15cm 3 / g. (Gao Y, et al. Chemical Engineering J, 2015, 274:76-83.) [0004] Yang et al. used calcium citrate to pyrolyze at 700-1000 °C to prepare carbon materials with mesoporous structure. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15H01B1/18H01G11/34H01G11/44H01M4/583H01M4/62H01M10/0525B82Y40/00
CPCC01B32/15H01B1/18H01G11/34H01G11/44H01M4/583H01M4/62H01M4/625H01M10/0525B82Y40/00Y02E60/10
Inventor 徐晨茜刘凯元张佳颖金益广尹号曹江行范美强
Owner CHINA JILIANG UNIV
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