Double-shell different component hollow carbon microsphere with adjustable cavity size and wall thickness

A double-shell, adjustable technology, applied in the field of new materials, can solve the problem of inability to achieve fine control of the diameter, cavity size, wall thickness and composition of hollow carbon microspheres, increase ion diffusion distance, reduce capacitor specific capacity, etc. It can effectively control the cavity size and wall thickness, the preparation process is simple and environmentally friendly, and the size is uniform.

Active Publication Date: 2019-02-05
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although single-shell hollow carbon microspheres have shown good application prospects, when they are used as supercapacitor materials, they will increase the diffusion distance of ions, which will lead to a decrease in the specific capacity of the capacitor and an increase in the mass transfer resistance.
At the same time, the single-shell structure is also difficult to realize the construction and loading of different components on the inner and outer walls of the shell, thus limiting the scope of use of these microspheres and the comprehensive performance of the prepared devices.
Although the invention patent with domestic application number 201410588081.1 provides a method for preparing a multilayer carbon hollow sphere anode material, the literature [Carbon 2015, 86, 235-244] uses hollow 2 As a template, heteroatom-doped double-shell hollow carbon microspheres were prepared [Carbon 2016, 99, 514-522] with double-shell C / SiO 2 As a template, Fe was prepared 3 o 4 doped double-shell carbon microspheres, but none of these methods can achieve fine control of hollow carbon microspheres such as diameter, cavity size, wall thickness, and composition.

Method used

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  • Double-shell different component hollow carbon microsphere with adjustable cavity size and wall thickness
  • Double-shell different component hollow carbon microsphere with adjustable cavity size and wall thickness
  • Double-shell different component hollow carbon microsphere with adjustable cavity size and wall thickness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Preparation of soft-core / hard-shell polystyrene (PS) microspheres: Measure 8 mL of styrene, add it dropwise to 120 mL of deionized water, blow in high-purity nitrogen gas and stir for 30 minutes, heat to 70°C, and then add 14 mL A deionized aqueous solution containing 0.16 g of potassium persulfate was used as an initiator, stirred at 70°C for 4 h, and then 1.8 mL of divinylbenzene was added to the above system to continue the reaction for 24 h to obtain a soft-core / hard-shell PS with a diameter of 250 nm. Microspheres.

[0024] 2) Preparation of PS / PDA composite microspheres: take 0.5 g of PS microspheres prepared in step 1) and ultrasonically disperse them in 400 mL of a mixed solvent with a volume ratio of ethanol: water = 7: 1, add 0.25 g of trishydroxyaminomethane and 0.75g of dopamine, mixed and stirred at room temperature for 24 hours, dopamine polymerized on the surface of polystyrene microspheres to obtain PS / PDA composite microspheres.

[0025] 3) Preparat...

Embodiment 2

[0027] 1) Preparation of soft-core / hard-shell polystyrene (PS) microspheres: Measure 8 mL of styrene, add it dropwise to 120 mL of deionized water, blow in high-purity nitrogen gas and stir for 30 minutes, heat to 70°C, and then add 14 mL A deionized aqueous solution containing 0.12 g of potassium persulfate was used as an initiator, stirred at 70°C for 4 h, and then 1.8 mL of divinylbenzene was added to the above system to continue the reaction for 24 h to obtain a soft-core / hard-shell PS with a diameter of 280 nm. Microspheres.

[0028] 2) Preparation of PS / PDA composite microspheres: according to Example 1.

[0029] 3) Preparation of double-shell heterogeneous hollow carbon microspheres: according to Example 1, double-shell heterogeneous hollow carbon microspheres with a cavity size of 255 nm can be obtained.

Embodiment 3

[0031] 1) Preparation of soft-core / hard-shell polystyrene (PS) microspheres: Measure 8 mL of styrene, add it dropwise to 120 mL of deionized water, blow in high-purity nitrogen gas and stir for 30 minutes, heat to 70°C, and then add 14 mL A deionized aqueous solution containing 0.08 g of potassium persulfate was used as an initiator, stirred at 70°C for 4 h, and then 1.8 mL of divinylbenzene was added to the above system to continue the reaction for 24 h to obtain a soft-core / hard-shell PS with a diameter of 320 nm. Microspheres.

[0032] 2) Preparation of PS / PDA composite microspheres: according to Example 1.

[0033] 3) Preparation of double-shell heterogeneous hollow carbon microspheres: according to Example 1, double-shell heterogeneous hollow carbon microspheres with a cavity size of 285 nm can be obtained.

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Abstract

The invention belongs to the field of new materials, and particularly relates to a double-shell different component hollow carbon microsphere with adjustable cavity size and wall thickness. A cross-linked soft core / hard shell polystyrene microsphere is used as a template. Through polymerization of dopamine on the surface of the microsphere and high-temperature carbonization in a nitrogen protecting atmosphere, the double-shell different component hollow carbon microsphere is prepared. The hollow carbon microsphere prepared by the method has the advantages of good dispersibility, uniform size,different double-shell components and adjustable cavity size and each shell thickness, and is innovation in a preparation aspect of the hollow carbon microsphere.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a double-shell heterogeneous hollow carbon microsphere with adjustable cavity size and wall thickness. Background technique [0002] In order to meet the increasing energy demand and more stringent carbon emission standards, the development of new energy storage devices with higher energy conversion efficiency and storage density has attracted more and more attention. However, the performance of these devices relies heavily on the unique structures and functions of nanomaterials used inside them. Carbon microspheres have high specific surface area, low density, excellent chemical stability, good electrical and thermal conductivity, so they are used in supercapacitors, fuel cell catalyst supports, lithium-ion battery anode materials, high-performance liquid chromatography column packing and Adsorption materials and other aspects have potential huge application value. Com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01B32/05
Inventor 陈志民王瑞娟杨瑞华冯磊孟迪陈永方明明陈加福付建伟
Owner ZHENGZHOU UNIV
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