Method and device for preparing spherical negative electrode active material, spherical negative electrode active material, lithium battery negative electrode and lithium battery

The invention relates to the technical field of lithium batteries, in particular to a method and a device for preparing a spherical negative electrode active material, the spherical negative electrode active material, a lithium battery negative electrode and a lithium battery, the method comprises t...

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Bibliographische Detailangaben
Hauptverfasser:	XIN FANWEN, ZHENG LUN, YANG GELING, GAO SHANSONG, WANG HONGXUE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF ELECTRICITY INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to the technical field of lithium batteries, in particular to a method and a device for preparing a spherical negative electrode active material, the spherical negative electrode active material, a lithium battery negative electrode and a lithium battery, the method comprises the following steps: (1) pre-treating an asphalt raw material to obtain pre-treated asphalt with the viscosity of 10-100mPa. S, and then in the presence of carrier gas, carrying out heat treatment on the pre-treated asphalt to obtain pre-treated asphalt with the viscosity of 10-100mPa. S; carrying out spray carbonization pelletizing on the pretreated asphalt to obtain first carbon microspheres and an oil-gas mixture; (2) carrying out gas-solid separation on the oil-gas mixture to obtain second carbon microspheres and high-temperature oil gas; and (3) carrying out graphitization treatment on the first carbon microspheres and/or the second carbon microspheres to obtain the spherical negative electrode active material.