Method for preparing negative pole piece from biomass material by dry method and prepared negative pole piece

• Main Authors: SHANG WENYAN, PAN LEI, FAN MEIMEI, ZHENG ZHIYONG, DU JIANGUO, SHU ZHEN
• Format: Patent
• Language: Chinese; English
• Published: 21.06.2024
• 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 preparing a negative pole piece from a biomass material by a dry method and the prepared negative pole piece, biomass is subjected to graphitization to obtain biomass graphite, pyrolytic carbon is obtained through carbonization, the biomass graphite, the pyrolytic carbon and the biomass are mixed according to a certain proportion, and a mixed carbon material with certain processability is obtained through heating and coking. The material is subjected to primary and secondary rolling to obtain a negative pole piece for a lithium battery. Biomass is converted into biomass graphite and biomass pyrolytic carbon, the two carbon materials are compounded to prepare the negative electrode, and high capacity and good cycle performance can be provided. The dry method is used for preparing the electrode, no solvent is needed, energy consumption and time needed by pole piece drying are reduced, and the process is simple, energy-saving and environment-friendly. 本发明公开了一种生物质材料干法制备负极极片的方法