Research progress on the electrospinning nanofiber lithium-ion battery separators

Abstract

Electrospinning nanofiber membrane has the advantages of wide raw materials, large specific surface area, and high porosity. It is an ideal separator material for lithium-ion batteries. This paper first introduces two common electrospinning nanofiber diaphragms: polymer, polymer, and inorganic composite, and then focuses on the modification methods of composite modification, blending modification, and inorganic modification, as well as the methods of electrospinning nano modified polyolefin diaphragm. Finally, the development direction of the electrospinning lithium-ion battery separator has prospected.

Safety Study Based on the Aging Mechanism of Retired Lithium Batteries

“…Disassembled the monomer batteries and used field-emitting scanning electron microscopes to study the positive and negative poles and diaphragms of decommissioned lithium batteries that had been "dived" after capacity and had not been cycled to age [9]. Figure 5 is a disassembly of the battery after the capacity "diving", during which it can be clearly observed that the battery electrolyte is seriously missing and the battery electrodes are dried up.…”