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A graphitized carbon material with a three-dimensional micro-nano composite structure, its preparation method and application

A micro-nano composite structure, graphitized carbon technology, applied in structural parts, electrical components, battery electrodes, etc., can solve problems such as unfavorable large-scale production, large changes in sulfur volume, loss of active materials, etc., to improve battery rate performance , more voids, the effect of improving energy density

Active Publication Date: 2020-11-20
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although lithium-sulfur batteries have many advantages, there are still some problems: first, the active material sulfur and its discharge product lithium sulfide have poor conductivity; "Corrosion" to the lithium negative electrode; the third is that the volume of sulfur changes greatly during charging and discharging
Carbon materials have good electrical conductivity, and their skeletons can fix sulfur, which can reduce the loss of active substances to a certain extent. Generally, researchers synthesize monodisperse carbon particles through hard templates, and the energy density is generally low. The method often has the disadvantages of complex technological process, time-consuming energy consumption, and disadvantages for large-scale production

Method used

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  • A graphitized carbon material with a three-dimensional micro-nano composite structure, its preparation method and application
  • A graphitized carbon material with a three-dimensional micro-nano composite structure, its preparation method and application
  • A graphitized carbon material with a three-dimensional micro-nano composite structure, its preparation method and application

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Embodiment 1

[0068] This embodiment provides a graphitized carbon material with a three-dimensional micro-nano composite structure and its preparation method

[0069] A method for preparing a graphitized carbon material with a three-dimensional micro-nano composite structure, comprising the steps of:

[0070] S1. Take 1mol of indium nitrate hydrate and 1mol of BTC, dissolve them in 80mL of DMF, stir mechanically at room temperature until the solid dissolves, transfer the mixed solution to a reaction kettle and seal it, and put the reaction kettle in an oven for reaction at 150°C The reaction was carried out for 12 hours. After the reaction was finished, it was naturally cooled to room temperature, and the reaction products were centrifugally washed three times with DMF, then three times with ethanol, and dried in an oven for 24 hours to obtain a precursor;

[0071] S2. Place the prepared precursor in a porcelain boat, and conduct carbonization treatment under the protection of an atmosphe...

Embodiment 2

[0076] This embodiment provides a graphitized carbon material with a three-dimensional micro-nano composite structure and its preparation method

[0077] A method for preparing a graphitized carbon material with a three-dimensional micro-nano composite structure, comprising the steps of:

[0078] S1. Take 1mol of indium nitrate hydrate and 1mol of BTC, dissolve them in 80mL of DMF, stir mechanically at room temperature until the solid dissolves, transfer the mixed solution to a reaction kettle and seal it, and put the reaction kettle in an oven for reaction at 150°C The reaction was carried out for 12 hours. After the reaction was finished, it was naturally cooled to room temperature, and the reaction products were centrifugally washed three times with DMF, then three times with ethanol, and dried in an oven for 24 hours to obtain a precursor;

[0079] S2. Place the prepared precursor in a porcelain boat, and conduct carbonization treatment under the protection of an atmosphe...

Embodiment 3

[0084] This embodiment provides a graphitized carbon material with a three-dimensional micro-nano composite structure and its preparation method

[0085] A method for preparing a graphitized carbon material with a three-dimensional micro-nano composite structure, comprising the steps of:

[0086] S1. Take 1.5mol indium nitrate hydrate, 1mol BTC, dissolve it in 80mL DMF, stir mechanically at room temperature until the solid dissolves, transfer the mixed solution to the reaction kettle and seal it, and put the reaction kettle in an oven for reaction, 150 °C for 12 hours. After the reaction was finished, it was naturally cooled to room temperature, and the reaction products were centrifugally washed three times with DMF, then three times with ethanol, and dried in an oven for 24 hours to obtain a precursor;

[0087] S2. Place the prepared precursor in a porcelain boat, and conduct carbonization treatment under the protection of an atmosphere of inert gas argon, at 2°C·min -1 Th...

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Abstract

The invention discloses a graphitizing carbon material with a three-dimensional micro-nano composite structure, and a preparation method and application thereof, and belongs to the technical field ofenergy source materials. The preparation method comprises the following steps of firstly, mixing indium salt, BTC (trimesic acid) and a solvent at room temperature, stirring and / or treating by ultrasonic waves until the solid is dissolved; then, treating by a hydrothermal method, so as to obtain a precursor; further carbonizing, pickling, and the like, so as to obtain the graphitizing carbon material of the three-dimensional micro-nano composite structure, wherein the porous graphitizing carbon material can be used as an active matter carrier and applied to a positive electrode of a lithium and sulfur battery. The prepared porous graphitizing carbon material with a spherical structure has the advantages that the porous graphitizing carbon material is a secondary micrometer-level carbon sphere formed by primary nanometer-level hollow particles; the carbon sphere has more internal cavities, large pore capacity, large specific surface area, good dispersivity and high stability; the conductivity is good. The lithium and sulfur battery using the porous graphitizing carbon material as the carrier for the active matter sulfur has higher energy density, good rate and cycle property.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and relates to a graphitized carbon material with a three-dimensional micro-nano composite structure, its preparation method and application, in particular to a graphitized carbon material with a three-dimensional micro-nano composite structure, its preparation method and its application in lithium-sulfur batteries. Applications. Background technique [0002] At present, the global environmental pollution is serious, and the non-renewable energy sources are depleting day by day, so we urgently need to find green and renewable energy sources to alleviate the energy crisis and reduce the serious greenhouse effect. For example, we are now using wind energy, solar energy, and tidal energy to solve part of the energy crisis, but these are greatly affected by weather and geographical location, and are unstable and uncertain. Therefore, efficient and economical energy storage systems are requi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62
CPCH01M4/625Y02E60/10
Inventor 褚卫国刘圣男王汉夫
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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