Method for recycling graphite from lithium battery negative electrode carbon powder and preparation method of graphene oxide

• Main Authors: DENG DI, LIU XIANGNING, ZENG GUISHENG, MI XUE, TAN RONG, GONG BAICHUAN, GONG JIE
• Format: Patent
• Language: Chinese; English
• Published: 18.01.2022
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a method for recycling graphite from lithium battery negative electrode carbon powder and a preparation method of graphene oxide, and relates to the field of battery recycling. The method comprises the steps: adding carbon powder into a ball mill; grinding the ball-milled carbon powder and ammonium chloride; roasting the mixture in argon; putting the carbon powder into a container, controlling the temperature to be 40-70 DEG C, inserting an ultrasonic vibration rod, and carrying out ultrasonic treatment; performing suction filtration to obtain graphite; mixing graphite with concentrated H2SO4, and dropwise adding KMnO4; and adding deionized water for dilution, adding hydrogen peroxide, filtering, washing and drying to obtain graphite oxide, dispersing the graphite oxide in a sodium hydroxide solution, and carrying out ultrasonic separation, centrifugation, filtering, washing and drying. The method has the beneficial effects that the carbon powder is subjected to ball milling treatment,