Sulfur-doped carbon material and preparation method thereof

A carbon material, sulfur doping technology, used in electrical components, battery electrodes, circuits, etc.

Inactive Publication Date: 2017-09-29
SHENZHEN CAPCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the popularization of electric vehicles and the development of portable, miniaturized and multi-functional electronic products, lithium-ion batteries have gradually failed to meet people's needs. Therefore, we urgently need to find new high-energy batteries with high energy

Method used

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  • Sulfur-doped carbon material and preparation method thereof
  • Sulfur-doped carbon material and preparation method thereof
  • Sulfur-doped carbon material and preparation method thereof

Examples

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preparation example Construction

[0018] At the same time, the present invention also discloses the preparation method of the above-mentioned sulfur-doped carbon material, which specifically includes: mixing antimony acetate, thioacetamide and ethylene glycol, stirring vigorously to obtain a mixed solution; then placing the mixed solution in a grinding chamber Add ethylenediaminetetraacetic acid into the bowl for grinding to obtain a precursor; then sinter the precursor to obtain the sulfur-doped carbon material.

[0019] According to the present invention, firstly, a mixed solution is prepared, and the mixed solution includes antimony acetate, thioacetamide and ethylene glycol. Specifically, antimony acetate and thioacetamide can be put into a stirring bottle first, and then ethylene glycol is added for vigorous stirring.

[0020] In the mixed solution, the relative content of antimony acetate, thioacetamide and ethylene glycol can vary within a wide range. Preferably, in the above-mentioned mixed solution, t...

Embodiment 1

[0032] This example is used to illustrate the sulfur-doped carbon material disclosed in the present invention and its preparation method.

[0033] Dissolve 4.5g of antimony acetate and 4.5g of thioacetamide in 6ml of ethylene glycol, and vigorously stir at room temperature for 12h to prepare a uniform mixture. Transfer the resulting mixture to a mortar, add 1 g of ethylenediaminetetraacetic acid, and grind for 2 hours. Antimony acetate and thioacetamide used were purchased from Shanghai Aladdin Biochemical Technology Co., Ltd., and ethylene glycol was purchased from Sinopharm Chemical Reagents. Co., Ltd., all are analytically pure.

[0034] Put the above-mentioned precursor obtained by grinding into a tube furnace, pass through argon gas with a purity of 99.99% at a flow rate of 40 mL / min, heat to 800 °C at a heating rate of 2 °C / min, keep the temperature for 4 hours, and then naturally cool to room temperature , the obtained black product is the sulfur-doped carbon material,...

Embodiment 2

[0040] This example is used to illustrate the sulfur-doped carbon material disclosed in the present invention and its preparation method.

[0041] Dissolve 3g of antimony acetate and 3g of thioacetamide in 6ml of ethylene glycol, and vigorously stir at room temperature for 12 hours to prepare a uniform mixed solution, transfer the obtained mixed solution to a mortar, add 2g of ethylenediaminetetraacetic acid, Grinding for 4h.

[0042] Put the above-mentioned precursor obtained by grinding in a tube furnace, feed argon gas with a purity of 99.99% at a flow rate of 40 mL / min, heat to 900 °C at a heating rate of 2 °C / min, keep the temperature for 4 hours, and then naturally cool to room temperature , the obtained black product is the sulfur-doped carbon material.

[0043] According to element content analysis, the sulfur element content in Example 2 is 5wt%.

[0044] image 3 SEM image of the sulfur-doped carbon material prepared in Example 2.

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Abstract

The invention aims to provide a sulfur-doped carbon material with relatively high discharge specific capacity. The thickness of a carbon layer of the sulfur-doped carbon material is 20-300 nanometers, and the sulfur content accounts for 3-20wt%. Meanwhile, the invention also discloses a preparation method of the sulfur-doped carbon material. The sulfur-doped carbon material provided by the invention has relatively high discharge specific capacity.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a sulfur-doped carbon material and a preparation method thereof. Background technique [0002] Since the 21st century, with the depletion of fossil energy such as coal and oil and the increasingly serious environmental problems, in order to ensure the sustainable development of society, seeking new clean energy has become a common issue for mankind. In the upsurge of research on new energy materials, lithium-ion batteries have become the focus of human research because of their advantages such as high energy density, long cycle life and high safety. [0003] Lithium-ion batteries use two different lithium intercalation compounds that can reversibly intercalate and extract lithium ions as the positive and negative electrodes of the battery respectively. When charging, lithium ions are deintercalated from the positive electrode and inserted into the negati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583
CPCH01M4/366H01M4/583Y02E60/10
Inventor 马建民张丽兰崔春雨毛玉华石桥
Owner SHENZHEN CAPCHEM TECH
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