A lithium ion battery negative electrode material fe2sis4 and its composite material fe2sis4/cpan

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of complex preparation methods and difficulty in large-scale production, and achieve simple and easy-to-operate synthesis methods, easy popularization and application, and wide sources Effect

Active Publication Date: 2018-08-10
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the above-mentioned preparation methods are complicated and difficult to achieve large-scale production.

Method used

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  • A lithium ion battery negative electrode material fe2sis4 and its composite material fe2sis4/cpan
  • A lithium ion battery negative electrode material fe2sis4 and its composite material fe2sis4/cpan
  • A lithium ion battery negative electrode material fe2sis4 and its composite material fe2sis4/cpan

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Experimental program
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Embodiment

[0020] Weigh Fe, Si, S with a total mass of 240mg (Fe / Si / S molar ratio is 2:1:4). Weigh 60mg of PAN, fully grind to a finer powder. Add the weighed medicine to the ground PAN powder, and grind until mixed evenly. After the raw materials are pressed into tablets, they are vacuum-sealed into a quartz tube and transferred to a muffle furnace for temperature control. The temperature was raised from room temperature to 300° C. over 10 hours and kept at that temperature for 10 hours. Then, after 10 hours, the temperature was raised to 800-1000°C, and the temperature was kept for 24 hours, and then the program was stopped. After cooling to room temperature, open the quartz tube to take out the product, and grind it for later use. Pure Fe 2 SiS 4 Same operation as above. Product Features:

[0021] figure 1 Is the embodiment solid phase reaction product Fe 2 SiS 4 and Fe 2 SiS 4 XRD pattern of / CPAN. The reaction gives Fe 2 SiS 4 and Fe 2 SiS 4 / XRD pattern of CPAN and...

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Abstract

The invention belongs to the field of energy storage, and relates to a lithium-ion battery negative electrode material, Fe2SiS4 and its composite material Fe2SiS4 / CPAN. The lithium-ion battery negative electrode material is made of Fe, Si and S as raw materials, with or without adding PAN, mixed After uniformity, it is pressed into tablets, put into a muffle furnace and slowly heated to 800-1000°C and reacted to obtain pure phase Fe2SiS4 or Fe2SiS4 / CPAN. The present invention has the following synthesis method, which is simple and easy to operate, and can realize large-scale synthesis. The solid-phase synthesis method is conducive to the industrialization of materials. The materials used in the invention have wide sources, are non-toxic, green and environment-friendly, and are easy to be popularized and applied in industry.

Description

technical field [0001] The invention belongs to the field of energy storage and relates to a novel negative electrode material Fe 2 SiS 4 and its composite Fe 2 SiS 4 / CPAN (carbonized polyacrylonitrile). The present invention also relates to Fe 2 SiS 4 synthetic method. Background technique [0002] At present, the problem of energy shortage is becoming more and more prominent, and energy storage devices play an important role in modern society. As an important member of the energy storage device family, lithium-ion batteries have been widely used in various fields, such as computers, mobile phones, watches, electric bicycles, etc. Although lithium-ion batteries are commercially available, their energy density limits their use in high-energy applications such as electric vehicles and the transmission grid industry. [0003] As an important component of lithium-ion batteries, the performance of negative electrode materials greatly affects the performance of the enti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/587H01M4/62H01M10/0525C01G49/00
CPCC01G49/009C01P2002/72C01P2002/85C01P2004/03H01M4/362H01M4/5815H01M4/587H01M4/625H01M10/0525Y02E60/10
Inventor 郭胜平李加闯薛怀国
Owner YANGZHOU UNIV
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