Synergistic Mechanism of Nanochannels and Chain Migration in Bioinspired Solid‐State Gel Electrolytes for Ultrahigh‐Rate, Long‐Life Flexible Tin‐Air Batteries

Abstract Flexible high‐performance tin‐air batteries (FTABs) exhibit transformative potential for wearable electronics. Nonetheless, the rate performance and cycle life are still limited by the sluggish hydroxide ion transport in gel polymer electrolytes (GPEs), along with the inactive tin and dendrites. Herein, drawing inspiration from the structure of neurons, we show a calcium‐coordinated multidimensional nanochannel GPE, incorporating one‐ and two‐dimensional of polyacrylamide, cellulose nanofibers‐graphene oxide, and calcium ion‐adsorbed single‐layer montmorillonite (PAM/CNF‐GO/CaSMMT). The bionic GPEs demonstrate remarkable tensile property (1350%), and ultra‐high ionic conductivity (294 mS·cm −1 ). The integration of kinetic isotope effect (KIE) technology and molecular dynamics simulations has, for the first time, elucidated the continuous multidimensional nanochannels and chain migration mechanism. The FTABs exhibit an ultralong cycle life up to 195 h, outperforming the previous tin‐air batteries. In addition, the device achieves an exceptional rate capability of 50 mA·cm −2 , while almost maintaining structural integrity under various deformations. This work has driven the development of flexible tin‐air batteries and set a new benchmark for the next generation of wearable energy storage.