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Molecular assembly superstructure materials based on core molecules, preparation methods and applications

A core molecule, super structure technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problem of particle dependence, etc., to improve the content and loading of sulfur, high porosity and specific surface area, improve specific energy Effect

Active Publication Date: 2019-08-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of particle types and particle characteristics, current molecular assembly methods are often particle-dependent

Method used

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  • Molecular assembly superstructure materials based on core molecules, preparation methods and applications
  • Molecular assembly superstructure materials based on core molecules, preparation methods and applications
  • Molecular assembly superstructure materials based on core molecules, preparation methods and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Disperse 1 g of nano-scale Ketjen black in 60 mL of commercially available concentrated nitric acid, react at 130 °C for 1 h under reflux conditions, wash with deionized water to neutrality and dry at 60 °C to obtain 1 g of nano-scale carboxylic acid Acidified Ketjen Black, dispersed in 100mL of deionized water, mixed with 0.5g of phytic acid, fully dissolved at 30°C; then firstly added 0.7587mL of ethylene glycol, then 0.87 g ammonium persulfate, heated to 130°C for 2h to form phosphate bond and carbonate bond; cooled to room temperature, filtered to obtain a solid, then washed with deionized water until the pH was neutral, and then dried at 120°C for 6h A reaction product is obtained; the reaction product is calcined at 1000° C. under an argon atmosphere, and the obtained powder is the aforementioned molecular assembly superstructure material based on core molecules.

[0057] 100 mg of the molecular assembly superstructure material based on the core molecule obtained ...

Embodiment 2

[0066] Disperse 1g of nano-scale Ketjen Black in 60mL of 1mol / L orthophosphoric acid, react at 130°C for 1h under reflux conditions, wash with deionized water until neutral and dry at 60°C to obtain 1g of nano-scale Phosphorylated Ketjen black, dispersed in 100mL ethanol, mixed with 0.5g phytic acid, fully dissolved at 30°C; then firstly added 0.7587mL ethylene glycol, then 0.87g Ammonium persulfate, heated to 130°C for 2 hours of connection reaction to form a phosphate bond; cooled to room temperature, filtered to obtain a solid, then washed with deionized water until the pH was neutral, and then dried at 120°C for 6 hours to obtain the reaction product; The reaction product is calcined at 1000° C. under an argon atmosphere, and the obtained powder is the molecular assembly superstructure material based on core molecules.

[0067] Evenly disperse 100 mg of the core molecule-based molecular assembly superstructure material obtained in this example in 100 mL of deionized water ...

Embodiment 3

[0076] Disperse 1g of nano-scale Ketjen black in 60mL of 1mol / L benzenesulfonic acid, react at 130°C for 1h under reflux conditions, wash with deionized water until neutral and dry at 60°C to obtain 1g of nano-scale Grade sulfonated Ketjen Black, dispersed in 100mL of isopropanol, mixed with 0.5g of phytic acid, fully dissolved at 30°C; then firstly added 0.7587mL of ethylene glycol under stirring and condensing reflux at 500rpm, then Add 0.87g of ammonium persulfate, heat to 130°C for connection reaction for 2h, form phosphate bond and sulfonate bond; cool to room temperature, filter to obtain solid, then wash with deionized water until the pH is neutral, and then in 120°C The reaction product was obtained by drying at low temperature for 6 hours; the reaction product was calcined at 1000° C. under an argon atmosphere, and the obtained powder was the aforementioned molecular assembly superstructure material based on core molecules.

[0077] Evenly disperse 100 mg of the core ...

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Abstract

The invention relates to a core molecule-based molecular assembled superstructure material, a preparation method and an application, and belongs to the field of chemical and molecular engineering materials. The superstructure material adopts a three-dimensional connected net-shaped structure formed by multiple structural units in connection; each structural unit is formed by particles through connection of connecting molecules and core molecules, so that structural stability of the material can be improved, and inner holes of the material can be diversified; the superstructure material is prepared by a thermodynamic assembling method; according to the application, the superstructure material, used as a sulfur carrier, is applied to a positive electrode material of a lithium-sulfur battery; by virtue of the application, the sulfur loading capacity of the lithium-sulfur battery can be improved; and meanwhile, buffer is provided for sulfur volume expansion in an electrochemical reaction process.

Description

technical field [0001] The invention relates to a molecular assembly superstructure material based on a core molecule, a preparation method and an application, and belongs to the field of chemical and molecular engineering materials. Background technique [0002] Superstructural materials refer to some artificial composite structures or composite materials with extraordinary physical properties that natural materials do not have. Through the orderly design of the structure on the key physical scale of the material, the limitation of some apparent natural laws can be broken through, so as to obtain the supernormal material function beyond the ordinary nature inherent in nature. Superstructural materials not only possess the synergistic properties of simple structures stacked together, but also often exhibit stronger or new properties. Therefore, complex superstructure materials assembled from simple unit modules have attracted extensive attention in the field of engineering ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/66H01M10/052
CPCH01M4/362H01M4/38H01M4/665H01M10/052Y02E60/10
Inventor 陈人杰叶玉胜吴锋钱骥赵腾邢易李丽
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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