Project Background

1.PFAS definition:(per-& polyfluoroalkyl substances) series of non-natural compounds. H in some C- H bonds that may exist on the molecular carbon chain skeleton is replaced by F to form fluorinated hydrophobic chains, including PVDF, PTFE, etc.
2.PFAS hazards: potential endocrine disruptors associated with a variety of adverse outcomes, including reproductive and developmental toxicity, may affect the functional persistence of reproductive hormones, and are hardly biodegradable
3.PFAS Act: In 2021, the United States requires PFAS not to be detected for packaging materials.
Article 68 of Annex 17 of the EU REACH Regulation restricts the C9-C14 of PFCA
3M plans to stop using PFAS in its product portfolio by the end of 2025

No fluorine adhesive HJ815

The molecular structure of fluorine-free adhesive HJ815 is a propylene copolymer, which is non-toxic and degradable, avoiding the PFAS Act. High electrochemical stability and protection of the active material, can form a layer of uniform coating on the separator, enhance the chemical resistance and electrochemical stability of the separator, to prevent the battery internal short circuit and safety problems.
HJ815 can be used as a diaphragm coated on a comprehensive alternative to PVDF.

HJ815 Product Advantage

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. By coating a fluorine-free adhesive material on the diaphragm base film, the thermal stability, liquid absorption and liquid retention of the diaphragm can be improved, and the bonding force of the pole piece can be improved, thereby improving battery safety, energy density, rate discharge, cycle life, etc.

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