Recent Advances and Future Perspectives of Fiber-Shaped Batteries

Intelligent electronics are drawing vast attention with an enormous market and revolutionizing the daily lives of humans in extensive fields. Fiber-shaped batteries (FSBs), which act as the core component of wearable electronics, demonstrate superior flexibility, wearability, mechanical stresses, adaptability to deformation, and scale production with a unique one-dimensional architecture. However, many difficulties, including a complicated fabrication process, high internal resistance, and poor stability, hindered its development. Herein, we first summarized the influence factors between different fabrication strategies and device configurations. Subsequently, we overviewed recent achievements and performances by categorizing the investigation of FSBs, for example, lithium-ion batteries, aqueous zinc-ion batteries, and metal-air batteries. In the end, technical challenges and perspectives in practical wearable applications are also discussed to promote the boosting of this fascinating field. In this review, a focused analysis of the recent advancements in FSBs is summarized, and we take a closer look at the boosted development of FSBs from mere potential industrialization to a genuinely new era.