Manipulating Hierarchical Orientation of Wet‐Spun Hybrid Fibers via Rheological Engineering for Zn‐Ion Fiber Batteries

• DOI: 10.1002/adma.202203905
• Publication Date: 2022-06-29T05:14:56Z
• Authors: Zhou Xia; Shuo Li; Guiqing Wu; Yanyan Shao; Dongzi Yang; Jinrong Luo; Zhenyang Jiao; Jingyu Sun; Yuanlong Shao
• Keywords: 01 natural sciences; 7. Clean energy; 0104 chemical sciences

Wet-spinning is a promising strategy to fabricate fiber electrodes for real commercial battery applications, according its great compatibility with large-scale production. However, engineering the rheological properties of electrochemical active materials accommodate viscoelasticity or liquid crystalline requirements continuous wet-spinning remains daunting challenge. Here, entropy-driven volume-exclusion effects, behavior vanadium pentoxide (V2 O5 ) nanowire dispersions regulated through introducing 2D graphene oxide (GO) flakes in an optimal ratio. By optimizing and liquid-crystalline spinning dope, wet-spun hybrid fibers display controlled hierarchical orientation. The V2 /rGO 10:1 mass fraction /rGO10:1 exhibits highly oriented nanoblock arrangement, enabling efficient Zn-ion migration excellent storage capacity 486.03 mAh g-1 at 0.1 A . half-meter long quasi-solid-state assembled polyacrylamide gel electrolyte biocompatible Ecoflex encapsulation. thus-derived integrated into wearable self-powered system, incorporating GaAs solar cell, which delivers record-high overall efficiency (9.80%) flexible charging systems.