What is separator engineering for rechargeable metal batteries?

Separator engineering has triggered massive research activities as a simple yet effective strategy to mitigate these intractable issues in recent years. Herein, we offer a critical review on the significant advances of separator engineering for rechargeable metal batteries.

What is a battery separator?

Battery separators are the unsung heroes within the realm of battery technology. In this comprehensive guide, we will explore the fascinating world of battery separators, shedding light on their definition, functions, types, and the intricate process involved in their manufacturing.

Why is a battery separator important?

As an essential component of batteries, separator plays a critical role in physically segregating the anode and cathode, enabling the movement of ions through pore channels, and retaining an adequate supply of electrolyte .

Why do lithium ion batteries need a separator?

During the charging and discharging processes, ions, such as lithium ions in lithium-ion batteries, must migrate through the separator to maintain the electrochemical balance. The porous structure of the separator allows controlled ion flow while preventing electrode contact, which could lead to short circuits. 3. Electrical Insulation

What are the mechanical properties of a battery separator?

The mechanical properties of separator generally involve tensile strength, Young’s Modulus, and puncture strength. Tensile strength and Young’s Modulus express the dimensional stability of the separator and determine the battery durability.

Why is chemical stability important for battery separators?

Except for the thermal stability and the mechanical strength, chemical stability is vital for battery separators because it ensures the separator material can withstand the harsh chemical environment inside the battery without degrading or reacting with the electrolyte or active materials.