Preparation method and application of silicon carbide ceramic-based nano-composite material

A nanocomposite, silicon carbide ceramic-based technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as hindering practical application, volume expansion, poor conductivity, etc., to promote diffusion. and electron transfer, enhance conductivity, and achieve the effect of stability
CN110429248AInactive Publication Date: 2019-11-08DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN UNIV OF TECH
Publication Date
2019-11-08
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a preparation method and application of a silicon carbide ceramic-based nano-composite material, and belongs to the technical field of nano material preparation and application. The method comprises the steps of: introducing, by an automatic control DC arc plasma device, a mixed atmosphere of an inert gas and hydrogen by using an industrial silicon block as an anode and a graphite rod as a cathode, and then introducing gaseous carbon source methane, acetylene or ethanol, evaporating the raw materials to obtain the silicon carbide ceramic-based nano-composite material; mixing the silicon carbide ceramic-based nano-composite material with a conductive agent and a binder to prepare an electrode to be used as a negative electrode material of a lithium ion battery, assembling the negative electrode material of the lithium ion battery into a cell lithium ion battery, performing an electrochemical performance test such that the cell lithium ion battery can exhibit excellent electrochemical performance. The silicon carbide ceramic-based nano-composite material has a simple preparation process and can realize industrial production. When applied to the negative electrode material of the lithium ion battery, the silicon carbide ceramic-based nano-composite material can realize stabile electrochemical cycle performance and a large-current charge-discharge capability. By processes of current, voltage, atmosphere type and gas pressure ratio thereof, passivation, screening, the method achieves control of the sizes, the distribution, and shapes of nano-powders.
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Description

technical field

[0001] The invention belongs to the field of nanomaterial preparation technology and application, and relates to a preparation method of a silicon carbide ceramic-based nanocomposite material and its application in lithium-ion battery negative electrode materials. Background technique

[0002] Silicon carbide is an important semiconductor material. Due to the strong covalent bond between carbon atoms and silicon atoms, it has high thermal conductivity, high hardness, high temperature stability, and chemical corrosion resistance, and can be used in harsh environments . As a wide bandgap semiconductor material (2.4-3.3eV), its on-state resistance is small, the leakage current is extremely small, and the PN junction withstand voltage is high. For a long time, due to its unique physical and chemical properties, silicon carbide materials have been used in new power semiconductor devices, such as the production of various integrated circuits, gate circuit insulati...

Claims

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