Detailed explanation of the use of graphene materials in the field of lithium battery energy storage

One is that graphene can be used directly as a negative electrode material or a positive and negative electrode composite material in lithium batteries, but it is difficult to promote temporarily due to the high cost and high cost; the second is that the graphene coating is used in the aluminum foil of the positive electrode current collector, which can be effective Reduce polarization and improve rate performance, especially for the current high specific energy, high voltage system of ternary batteries, graphene materials can effectively improve the cycle life of the battery; third, graphene is used as a positive electrode conductive agent, in the material During the preparation process, fully utilize the conductive network characteristics of graphene to modify the cathode material; fourth, in the use of traditional conductive agents and high-end diversified conductive agents, graphene plays an important role with its excellent conductive properties: as a flexible The flakes form a surface-to-point contact between the active materials. In order to better improve the conductivity of the electrode sheet, in industrial processing and use, graphene and conductive carbon black are often mixed and used to achieve points and points. Adequate contact between point and surface. Graphene as a base material can load active materials well, control the size of the material, improve the conductivity of the electrode, the volume expansion of the converging material, and improve the battery performance; coating on the current collector can protect the current collector and prolong the service life. Reduce polarization and improve rate characteristics; in power lithium-ion batteries, as a conductive agent additive, it is beneficial to increase the compaction density of the pole piece and improve the conductivity of the material. my country is one of the most important processing countries for lithium batteries. In 2014, my country's lithium battery output reached 5.287 billion, accounting for 71.2% of the world's total output, and it has continued to rank first in the world for 10 years. As of the end of 2018, my country's lithium battery output reached 13.987 billion, more than double the amount in 2014. With the technological innovation of lithium battery processing manufacturers and the improvement of performance and safety, people's demand for lithium batteries will continue to rise. It is estimated that by 2024, the market size of my country's lithium battery industry will exceed 150 billion yuan. Graphene has magical advantages and great potential in new energy storage materials, and its application prospects are very broad. Compared with other countries, the research and development of graphene in my country is focused on the preparation of graphene and its use in lithium battery electrodes, and there are relatively few patents in the preparation of semiconductor devices. At present, the development of graphene in my country is in a critical period from the laboratory to the industrialization, and a leading industry should be built to promote the graphene industry to become bigger and stronger. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the situations where the battery/battery pack cannot be charged?