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Preparation method and application of hollow hyper-branched carbon material

A technology of hyperbranched carbon and carbon-based materials, which is applied in the energy field to achieve the effects of reduced contact resistance, high specific surface area, and high superelectric performance

Active Publication Date: 2021-08-10
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on the above considerations, using a simple method to prepare three-dimensional multi-scale hollow carbon materials can effectively improve the performance of carbon-based electrode materials. However, hollow hyperbranched carbon materials have not been reported, and the unique hyperbranched hollow structure will endow carbon materials with better performance. electrochemical performance

Method used

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  • Preparation method and application of hollow hyper-branched carbon material
  • Preparation method and application of hollow hyper-branched carbon material
  • Preparation method and application of hollow hyper-branched carbon material

Examples

Experimental program
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Effect test

Embodiment 1

[0039] refer to figure 1 , the preparation method of hollow hyperbranched carbon material comprises the following steps:

[0040] (1) Synthesis of ZIF-8 nanoparticles

[0041] ZIF-8 nanoparticles were prepared by a simple precipitation method.

[0042] Take 0.8g of zinc nitrate and dissolve in 50ml of methanol to obtain solution A, meanwhile, dissolve 0.8g of 2-methylimidazole in 50ml of methanol to obtain solution B. Subsequently, solution A and solution B were mixed and stirred for 1 min, and the mixed solution was allowed to stand at 4° C. for 24 h. After the reaction, the product is centrifuged, washed, and vacuum-dried to obtain the product ZIF-8 nanoparticles.

[0043] (2) Synthesis of hollow hyperbranched glucose-derived carbon-based materials

[0044] Hollow hyperbranched glucose-derived carbon-based materials were prepared by a one-step hydrothermal reaction.

[0045] 0.1 g of ZIF-8 nanoparticles and 1.6 g of glucose were ultrasonically dispersed and dissolved in...

Embodiment 2

[0051] The hollow hyperbranched carbon material obtained in Example 1 is used as an electrode material in a supercapacitor, and the specific steps are as follows:

[0052] Hollow hyperbranched carbon material, carbon black and PTFE are weighed at a mass ratio of 8:1:1 and mixed with ethanol to obtain a slurry, and then the mixed slurry is pressed on the surface of nickel foam, and the load is obtained after drying in an oven About 2mg cm –2 the working electrode.

[0053] The electrochemical performance test of the hollow hyperbranched carbon material was carried out in a standard three-electrode cell. The nickel foam loaded with the hollow hyperbranched carbon material was used as the working electrode, the Pt sheet was used as the counter electrode, Hg / HgO was used as the reference electrode, and 6M KOH for the electrolyte. The CV test voltage range is -1 to 0V, and the scan rate is 10-200mV s –1 . The GCD test voltage range is -1 to 0V, and the charge and discharge curr...

Embodiment 3

[0057] Synthesis of Hollow Hyperbranched Carbon Materials

[0058] (1) Synthesis of ZIF-8 nanoparticles

[0059] ZIF-8 nanoparticles were prepared by a simple precipitation method.

[0060] Take 0.8g of zinc nitrate and dissolve in 50ml of methanol to obtain solution A, meanwhile, dissolve 0.8g of 2-methylimidazole in 50ml of methanol to obtain solution B. Subsequently, solution A and solution B were mixed and stirred for 1 min, and the mixed solution was allowed to stand at 3° C. for 12 h. After the reaction, the product is centrifuged, washed, and vacuum-dried to obtain the product ZIF-8 nanoparticles.

[0061] (2) Synthesis of hollow hyperbranched glucose-derived carbon-based materials

[0062] Hollow hyperbranched glucose-derived carbon-based materials were prepared by a one-step hydrothermal reaction.

[0063] 0.1 g of ZIF-8 nanoparticles and 1.0 g of glucose were ultrasonically dispersed and dissolved in 40 ml of deionized water, and then the mixed solution was trans...

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Abstract

The invention relates to a preparation method and application of a hollow hyper-branched carbon material. The preparation process of the hollow hyper-branched carbon material comprises the following steps: (1) preparing ZIF-8 nanoparticles by a precipitation method; (2) preparing a hollow hyper-branched glucose derived carbon-based material from the ZIF-8 nanoparticles and glucose in a one-step hydrothermal manner; and (3) performing high-temperature carbonization on the hollow hyper-branched glucose derived carbon-based material to obtain the hollow hyper-branched carbon material. According to the invention, the preparation method is simple, a hollow super-branched structure can be built through a one-step hydrothermal reaction, the final product hollow super-branched carbon material has a high specific surface area, a large-volume cavity and an ultrathin carbon wall, contact resistance can be effectively reduced when an electrode material is prepared, and electrochemical performance can be effectively improved when the hollow super-branched carbon material is applied to a supercapacitor.

Description

technical field [0001] The invention belongs to the technical field of energy, and relates to a method for preparing a hollow hyperbranched carbon material and its application, in particular to the preparation of a hollow hyperbranched carbon material and its application as an electrode material in an energy storage device. Background technique [0002] In recent years, the rapid development of electric vehicles, information technology, intelligent equipment and other fields has put forward strategic requirements for energy storage and conversion devices with large capacity, high efficiency and long life, and electrode materials are the key factors affecting the above performance. Due to their excellent electrical transport properties and highly active surface, carbon materials are not only important energy storage materials, but also can build energy transport networks, and at the same time play an important role in electron transfer and regulation of interfacial reactions i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/86
CPCH01G11/32H01G11/86Y02E60/13
Inventor 纪律律朱滢滢王晟王騊
Owner ZHEJIANG SCI-TECH UNIV
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