Ultraviolet‐Assisted Printing of Flexible Solid‐State Zn‐Ion Battery with a Heterostructure Electrolyte
Fan Bu, Yong Gao, Qiangzheng Wang, Yuxuan Wang, Chun Li, Jiayu Yang, Xiangye Liu, Cao Guan
Abstract
Abstract Flexible solid‐state Zn‐ion batteries (ZIBs) have garnered considerable attention for next‐generation power sources, but the corrosion, dendrite growth, and interfacial problems severely hinder their practical applications. Herein, a high‐performance flexible solid‐state ZIB with a unique heterostructure electrolyte is facilely fabricated through ultraviolet‐assisted printing strategy. The solid polymer/hydrogel heterostructure matrix not only isolates water molecules and optimizes electric field distribution for dendrite‐free anode, but also facilitates fast and in‐depth Zn 2+ transport in the cathode. The in situ ultraviolet‐assisted printing creates cross‐linked and well‐bonded interfaces between the electrodes and the electrolyte, enabling low ionic transfer resistance and high mechanical stability. As a result, the heterostructure electrolyte based ZIB outperforms single‐electrolyte based cells. It not only delivers a high capacity of 442.2 mAh g −1 with long cycling life of 900 cycles at 2 A g −1 , but also maintains stable operation under mechanical bending and high‐pressure compression in a wide temperature range (−20 °C to 100 °C).