Method for evaluating batch graphene layer number distribution based on lithium intercalation kinetic model

• Main Authors: WANG XIN, WANG XUNCHUN, LI BIN, SHI XIANGLEI, WANG BO, LIU YONG, ZHOU LIHUA, SUN LIJIE
• Format: Patent
• Language: Chinese; English
• Published: 30.05.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; METALLURGY; NON-METALLIC ELEMENTS; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TESTING

The invention relates to a technology for applying a lithium intercalation kinetic model to intercalation of different layers of graphene, and in the charging and discharging process of graphene, Li < + > mainly generates adsorption and desorption behaviors on the outer surface of the graphene and generates Li < + > lithium intercalation and desorption behaviors between inner layers. Diffusion barriers of different layers of graphene in the lithium intercalation process are different, so that difference of lithium intercalation potential energy is caused, and finally the difference is reflected on a constant-current charge-discharge lithium intercalation platform, so that the layer number distribution of the batch of graphene is evaluated according to the calculated slope k. By analyzing the difference of the inner and outer surfaces of different layers of graphene in electrochemical behaviors, the problem of evaluating the layer number distribution of graphene industrially is solved. The method for evaluatin