Electrospinning for flexible sodium-ion batteries

As a distinct and versatile approach, electrospinning has been generally used to produce one-dimensional fiber materials of polymers, metals, ceramics, and composites. These fibers are ubiquitously applicable in sodium-ion batteries, as either electrode, electrolyte, or separator. Moreover, electrospun fibers can be easily interwoven into membranes, which are ideal components for flexible batteries. In this review, the key merits and progress of electrospinning in fabricating components for flexible sodium-ion batteries are highlighted, and the main challenges facing its scalable utilization in practice are discussed. Several research directions of electrospinning are put forward for the forthcoming advances in this field. We hope this work will inspire new ideas and pathways for future research.