Lithium-ion battery separator material properties

What properties should a lithium ion battery separator have?

Since the electrolyte is an organic solvent system for lithium-ion batteries, the separator should generally possess the following properties: The pore size and structure are usually influenced by polymer compensation and stretching conditions. The pore size affects the transit of the anode and cathode of the li-ion battery.

Why is a Lithium Ion Separator important?

As a key component of LIBs, the separator plays a crucial role in sequestering the electrodes, preventing direct contact between the positive and negative electrodes, and allowing the free passage of lithium ions in the electrolyte. Additionally, the separator is also crucial for ensuring the safe operation of the batteries.

Do lithium-ion batteries have separators?

Separators are an essential part of current lithium-ion batteries. Vanessa Wood and co-workers review the properties of separators, discuss their relationship with battery performance and survey the techniques for characterizing separators.

Why do we need a characterization of a battery separator?

It is crucial to obtain an in-depth understanding of the design, preparation/ modification, and characterization of the separator because structural modifications of the separator can effectively modulate the ion diffusion and dendrite growth, thereby optimizing the electrochemical performance and high safety of the battery.

How do micropores affect a lithium-ion battery separator?

The micropores of the separator have a significant influence on the obstruction of the electrode active material particles at the initial stage and on the micro particles that may enter the lithium-ion battery during the manufacturing process, which may cause damage to the weak point of the separator.

Why is a battery separator important?

Although separator is an inactive element of a battery, characteristics of separators such as porosity, pore size, mechanical strength, and thermal stability influence the ion transport, cycle life, performance, and safety of the batteries . Thus, the separator represents one of the key components in LIBs.