Battery Binder

The battery binder in lithium batteries is an essential component that ensures the effective performance of the battery. Lithium batteries are increasingly used in various electronic devices because of their high performance and long life span. The battery binder plays a critical role in keeping the battery components together, ensuring proper contact, and preventing any leakage.

One of the key advantages of lithium batteries is their ability to provide high energy and power density, making them ideal for use in high-performance devices. The battery binder, being the glue that holds the battery components together, needs to have strong adhesive properties that can withstand the stresses and strains placed on the battery during use.

As lithium batteries continue to grow in popularity, the demand for high-quality battery binders has increased. Manufacturers are constantly looking for new and innovative ways to improve the performance of their products, and the battery binder is an area where significant progress has been made.

There are various types of battery binders used in lithium batteries, including:

(1)Cathode Binder PVDF（Poly-vinylidene fluoride）

It mainly refers to homopolymers of vinylidene fluoride and copolymers of vinylidene fluoride and other compounds.

- Homopolymer class PVDF, is a homopolymer of VF2, such as HSV900, 5130, etc;

- Copolymer class PVDF, the main use of VF2 (vinylidene fluoride) / HFP (hexafluoropropylene) copolymer, such as 2801, LBG, etc..

CH2=CF2→(CH2CF2)n

(2)Anode Binder SBR

• Styrene-butadiene rubber emulsion: made by the polymerization of butadiene and styrene monomer and other functional monomers.
• Styrene emulsion: It mainly contains two monomers, styrene and acrylate. There are more types of acrylate monomers, commonly used ones include methyl acrylate, ethyl acrylate, methyl methacrylate and so on. The presence of ester group increases the affinity between binder and electrolyte; in addition, a large number of electronegative elements in the molecular chain (with lone pair of electrons, which will continuously complex/decomplex with lithium ions under the action of electric field, which is favorable for the diffusion of lithium ions), which leads to the outstanding low-temperature performance.
• Acrylates: also known as pure propylene emulsion, other functional monomers, such as acrylonitrile monomer, fluorine-containing monomers, etc., are generally introduced, which can satisfy the two factors of electrolyte swelling and electronegative element content at the same time, and thus have excellent kinetic performance.

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