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Slag pretreatment method and preparation method of supercapacitor electrode material

A pretreatment and slag technology, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, nanotechnology for materials and surface science, etc., can solve the problems of excessive slag impurities, high price, and unsuitability for supercapacitors Electrode material production raw materials and other issues

Pending Publication Date: 2021-09-10
GUIZHOU CHEM IND BUILDING CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, the electrode materials for the preparation of supercapacitors are all directly purchased raw materials, and the price is relatively expensive. If slag is used as the raw material, the slag contains too many impurities, and it is not suitable for the production of electrode materials for supercapacitors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Preparation of nanomaterials: sinter nickel-molybdenum slag (100g) at a high temperature of 800°C for 4 hours, then lower the temperature to 600°C, then put it into pure water at room temperature, dry, and use a nano-grinder to dry the dried nickel-molybdenum slag Grind for 1 hour to obtain a powder, then sieve the powder with a 800-mesh sieve, and take the sieve to obtain the nickel-molybdenum slag powder; take 20 grams of slag, soak in 2mol / L 150mL hydrochloric acid, soak for 10 hours, Then add NH 3 water, adjust the pH to 6-7, and add 1 g of thiourea; transfer the obtained mixed solution into a polytetrafluoroethylene-lined stainless steel reactor for hydrothermal reaction, the reaction temperature is 100 ° C, and the reaction time is 6 hours; after the reaction is completed , naturally cooled to room temperature, centrifuged several times with distilled water, and vacuum dried at 80°C for 6 hours to obtain Ni 0.2 Mo 0,8 S 2 nanomaterials.

[0030] 2) Preparat...

Embodiment 2

[0033] 1) Preparation of nanomaterials: sinter nickel-molybdenum slag (100g) at a high temperature of 1000°C for 6 hours, then lower the temperature to 500°C, then put it into pure water at room temperature, dry, and use a nano-grinder to dry the dried nickel-molybdenum slag Grind for 3 hours to obtain powder, then sieve the powder with a 900-mesh sieve, and take the sieve to obtain nickel-molybdenum slag powder; take 20 grams of slag, soak in 5mol / L 150mL hydrochloric acid, soak for 30h, Then add NH 3 water, adjust the pH to 6-7, and add 1 g of thiourea; transfer the obtained mixed solution into a polytetrafluoroethylene-lined stainless steel reactor for hydrothermal reaction, the reaction temperature is 150 ° C, and the reaction time is 12 hours; after the reaction is completed , naturally cooled to room temperature, centrifuged several times with distilled water, and vacuum dried at 60°C for 5 hours to obtain Ni 0.2 Mo 0,8 S 2 nanomaterials.

[0034] 2) Preparation of e...

Embodiment 3

[0037] 1) Preparation of nanomaterials: Sinter nickel-molybdenum slag (100g) at a high temperature of 900°C for 5 hours, then lower the temperature to 550°C, then put it into pure water at normal temperature, and dry it. Grind for 2 hours to obtain powder, then sieve the powder with a 1000-mesh sieve, and take the sieve to obtain nickel-molybdenum slag powder; take 20 grams of slag, soak in 4mol / L 150mL hydrochloric acid, soak for 20h, Then add NH 3 water, adjust the pH to 6-7, and add 1 g of thiourea; transfer the obtained mixed solution into a polytetrafluoroethylene-lined stainless steel reactor for hydrothermal reaction, the reaction temperature is 120 ° C, and the reaction time is 10 h; after the reaction is completed , naturally cooled to room temperature, centrifuged several times with distilled water, and vacuum dried at 70°C for 5 hours to obtain Ni 0.2 Mo0,8 S 2 nanomaterials.

[0038] 2) Preparation of electrode materials: the prepared Ni 0.2 Mo 0.8 S 2 The co...

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Abstract

The invention provides a slag pretreatment method and a preparation method of a supercapacitor electrode material. The slag pretreatment method comprises the steps of: carrying out high-temperature sintering on nickel-molybdenum slag at 800-1000 DEG C for 4-6 hours, then reducing the temperature to 600 DEG C, and placing the sintered nickel-molybdenum slag in pure water for washing the slag, and drying the slag; grinding the dried nickel-molybdenum slag, and screening with the ground slag with a screen of 800 meshes or above to obtain slag powder; and soaking the slag powder in hydrochloric acid, adding NH3 water to carry out hydrothermal reaction with thiourea, and cooling and drying a reaction product after finishing the reaction. According to the slag pretreatment method and the preparation method of the supercapacitor electrode material of the invention, the slag is used for preparing the supercapacitor electrode material, so that energy recycling, energy conservation and environmental protection are realized; the slag is pretreated to a certain degree, so that the slag is more suitable for being used as a raw material of the supercapacitor electrode material, and the obtained material has very strong electrochemical performance through detection.

Description

technical field [0001] The invention relates to the field of preparation of supercapacitor electrode materials, in particular to a slag pretreatment method and a preparation method of supercapacitor electrode materials. Background technique [0002] Supercapacitor is a new type of energy storage device, which has the advantages of high power density, long service life, and environmental protection, so it has a wide range of applications. However, the energy density of supercapacitors is still very low, which greatly limits their further development. Currently, carbon materials, metal oxides, and conducting polymers are widely used as electrode materials for supercapacitors. In the process of exploring high-performance electrode materials, transition metal sulfides have been widely studied as good electrode materials due to their high natural abundance, low cost, variable oxidation state, and high electrochemical activity. Among the transition metal sulfides, nickel sulfide...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/32H01G11/44H01G11/24B82Y30/00B82Y40/00
CPCH01G11/86H01G11/32H01G11/44H01G11/24B82Y30/00B82Y40/00Y02E60/13
Inventor 任金华王壹郑彦涛张明忠罗军冉涛褚维周虎生
Owner GUIZHOU CHEM IND BUILDING CORP
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