Electrospun fiber-based electrodes materials for flexible lithium-ion batteries

Flexible lithium-ion batteries (FLBs) hold a promising future in the fields of wearable electronic accessories, wearable therapeutic devices, etc. due to their long cycle life, good flexibility, and the transferable experience from traditional rigid lithium-ion batteries. Additionally, electrospinning technology, as an important method of synthesizing fiber materials, has good controllability and shows incomparable advantages in the preparation of fiber-based electrodes. Therefore, this review first discusses the assessment of flexibility and proposes that standardized assessment methods are the foundation for the development of flexible energy storage devices. It then analyzes in detail the principle of electrospinning technology and the impact of various parameters on electrode performance, exploring the controlling of the morphology of fibers by optimizing process parameters. The pivotal role of electrospinning technology in manufacturing FLBs is also discussed, with a particular focus on its contribution to enhancing energy density, cycling stability, and mechanical flexibility in both cathode and anode materials. Overall, the review provides guidance for the development of high-performance FLBs.