One-dimensional multi-layer nano-chain composite material, preparation method thereof and application in lithium ion battery

A nanocomposite material, lithium-ion battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low capacity and poor cycle stability of negative electrode materials, and achieve stable cycle performance, large specific capacity, and batch controllable. Effect

Active Publication Date: 2022-02-25
乌海瑞森新能源材料有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0005] Another object of the present invention is to provide a multilayer structure Fe 2 P@SnP 0.94 @MoS 2 The application of the nano chain composite material in the battery is used to make the negative electrode of the lithium ion battery, and then the lithium ion battery is prepared, and the one-dimensional multilayer Fe 2 P@SnP 0.94 @MoS 2 Nanochain composite materials are used to make lithium-ion battery anodes, which can overcome technical problems such as low capacity and poor cycle stability of lithium-ion battery anode materials

Method used

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  • One-dimensional multi-layer nano-chain composite material, preparation method thereof and application in lithium ion battery
  • One-dimensional multi-layer nano-chain composite material, preparation method thereof and application in lithium ion battery
  • One-dimensional multi-layer nano-chain composite material, preparation method thereof and application in lithium ion battery

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Embodiment 1

[0049] A one-dimensional multilayer Fe 2 P@SnP 0.94 @MoS 2 The preparation method of nano chain composite material, comprises the following steps:

[0050] 1) Fe 3 o 4 Preparation of nanosphere material: Weigh 4.3g of FeCl 3 ·6H 2 0. The sodium acetate of 4.0g and the trisodium citrate of 1.0g are in the beaker, add 70mL ethylene glycol, make it dissolve completely under ultrasonic, the gained solution is poured in the liner of 100mL polytetrafluoroethylene reactor, in Under the condition of 200°C, react for 10h, cool down after the reaction, centrifuge at a speed of 8000 per minute / rev, wash with deionized water and ethanol three times, and dry in vacuum at 60°C for 12h to obtain Fe 3 o 4 Nanosphere material; its SEM image is shown in figure 1 As shown, it can be seen from the figure that it is a spherical structure with uniform size; its XRD pattern is as follows Figure 9 shown;

[0051] 2) Fe 3 o 4 @SiO 2 The preparation of nanochain composite material: take b...

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Abstract

The invention provides a one-dimensional multi-layer nano chain composite material, a preparation method thereof and application in a lithium ion battery. The method comprises the following steps: firstly, growing a SnO2 nano material on the surface of a one-dimensional Fe3O4@SiO2 nano chain material, then using ammonia water for etching, removing SiO2 in the material to form a multi-layer nano chain structure, reacting the multi-layer nano chain structure with a phosphating agent under calcining to convert the structure into a one-dimensional multilayer Fe2P@SnP0.94 composite material, and growing a MoS2 nanosheet material on the surface of the composite material through hydrothermal reaction to obtain a one-dimensional multilayer Fe2P@SnP0.94@MoS2 nano-chain composite material. The one-dimensional core-shell structure has large specific surface area and internal residual space, the problem of large volume structure change of the material in the charge-discharge process is effectively solved, the core-shell structure can buffer the volume structure change in the charge-discharge process, and the cycle capacity and stability of the battery are improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery materials, and relates to a one-dimensional multilayer nano-chain composite material and its preparation method and application in lithium-ion batteries, in particular to a one-dimensional multilayer Fe 2 P@SnP 0.94 @MoS 2 Nanochain composite material and its preparation method and application in lithium ion battery. Background technique [0002] With the development of human society, energy demand continues to increase. At present, fossil energy has been depleted due to extensive development. Therefore, the development of a new type of secondary energy storage system has become a hot spot in the field of scientific research. Lithium-ion batteries have gradually become mainstream energy storage devices in the fields of electric vehicles, aerospace, and military due to their advantages such as high voltage, light weight, large specific energy, long cycle life, and no pollution. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/08C01G39/06H01M4/36H01M4/58
CPCC01B25/08C01G39/06H01M4/366H01M4/5805H01M4/5815C01P2004/03C01P2004/04C01P2002/72C01P2006/12C01P2006/40C01P2004/62C01P2004/61C01P2004/32C01P2004/10Y02E60/10
Inventor 刘金云周婷陈中华韩阗俐
Owner 乌海瑞森新能源材料有限公司
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