The separator is one of the key inner components of lithium batteries and an important component of cost. The separator is a porous insulating film that separates the positive and negative electrodes of the battery to prevent short circuits. The pores of the separator enable the electrolyte to transport lithium ions and electrons from the external circuit, thereby forming an electrochemical charge-discharge circuit. The performance of the separator determines the interface structure and internal resistance of the battery, and directly affects the capacity, cycle and safety performance of the battery.

In the lithium battery industry, PVDF (polyvinylidene fluoride, a high-performance fluoropolymer material) is irreplaceable in the field of diaphragm coating due to its unique performance advantages, especially in the context of the rapid development of high-voltage high-energy density battery systems. The high-pressure stability of PVDF has become an important competitive advantage. However, for environmental reasons, its raw materials are strictly controlled.

Jin Tianchi Company has a first-class core technology research and development team. After several years of painstaking research, it has designed and developed an environment-friendly fluorine-free adhesive-fluorine-free adhesive. By coating fluorine-free adhesive on the diaphragm base film, it can not only improve the thermal stability of the diaphragm, but also improve the liquid absorption and retention, and the adhesion of the pole piece, thus improving the safety, energy density, rate discharge, cycle life, etc.

Keywords: SBR CMC flexible agent cracking agent coated carbon aluminum foil adhesive graphene