Facile fabrication of flexible electrodes with poly(vinylidene fluoride)/Si3N4 composite separator prepared by electrospinning for sodium‐ion batteries

Process‐Structure‐Formulation Interactions for Enhanced Sodium Ion Battery Development: A Review

“…As a result, Na‐ion battery researchers can select from a range of separator types, ready for use without further processing in the laboratory. In contrast, development of novel separators for Na‐ion cells frequently involves specialised processing equipment such as electrospinning to achieve a desirable nanostructure [192,193] . Pores in separators must be sufficiently small and tortuous to obstruct dendritic growth, [194] but this consequently restricts the flow‐through of liquid electrolyte during wetting.…”

Highly Connective Spongy Polyimide Separators Blended with Inorganic Whiskers for High-Performance Lithium-Ion Batteries

“…51 Silicon nitride whisker (SNw), possessing superb chemical and electrochemical stability, high temperature stability (melting point of 1900 °C), and high dielectric properties (10 15 −1016 Ω cm −1 ), is a potential additive to be used in the battery separator. 52 The homogeneously dispersed whiskers in polymer matrices provide the composite separator with enhanced dimensional stability, improved heat resistance, high electrolyte affinity, and excellent cycling performances. Particularly, we hope to obtain the separator with improved permeability by introducing this rod-shaped "powder" to destroy inner pore walls, instead of introducing porogens.…”

Poly(dopamine) surface‐modified polyethylene separator with electrolyte‐philic characteristics for enhancing the performance of sodium‐ion batteries

“…Frequently, the fabrication process is based on traditional methods such as dip-coating, solution casting, thermal polymerization, and electrospinning. [32][33][34][35][36] J. Qin et al prepared s-2D poly(dopamine)-graphene on one side of a PP separator by using a casting method, 37 which exhibits high electrolyte wettability, homogeneous Na ion transport, and improved contact area. Besides, the PVDF/ Si 3 N 3 separator is electrospun directly onto the Na 2 Ni[Fe (CN) 6 ] cathode, yielding a flexible separator@electrode combination.…”

“…Besides, the PVDF/ Si 3 N 3 separator is electrospun directly onto the Na 2 Ni[Fe (CN) 6 ] cathode, yielding a flexible separator@electrode combination. 36 From a molecular perspective, polymer brushes with an abundance of polar functional group such as NH , C═O, OH, and COOH, can improve electrolyte wettability, producer a robust SEI interface, and thus readily homogenize alkali-metal ion distribution and nucleation. [38][39][40][41] Poly(dopamine) (PDA) is an excellent material for the modification of PE separators.…”