Hierarchically Nanostructured Solid-State Electrolyte for Flexible Rechargeable Zinc-Air Batteries.

作者：Mi Xu, Haozhen Dou, Zhen Zhang, Yun Zheng, Bohua Ren, Qianyi Ma, G. Wen, Dan Luo, A. Yu, Luhong Zhang, Xin Wang, Zhongwei Chen · 发表于：Angewandte Chemie · 年份：2022 · DOI：10.1002/anie.202117703 · 被引用次数：81 · 研究领域：Medicine

The construction of safe and environmentally-benign solid-state electrolytes (SSEs) with intrinsic hydroxide ion-conduction for flexible zinc-air batteries is highly desirable yet extremely challenging. Herein, hierarchically nanostructured CCNF-PDIL SSEs with reinforced concrete architecture are constructed by nanoconfined polymerization of dual-cation ionic liquid (PDIL, concrete) within robust three-dimensional porous cationic cellulose nanofiber matrix (CCNF, reinforcing steel), where plenty of penetrating ion-conductive channels are formed and undergo dynamic self-rearrangement under different hydrated levels. The CCNF-PDIL SSEs synchronously exhibit good flexibility, mechanical robustness, superhigh ion conductivity of 286.5 mS/cm, and decent water uptake. The resultant flexible solid-state zinc-air batteries deliver a high-power density of 135 mW/cm2, specific capacity of 775 mAh/g and ultralong cycling stability with continuous operation of 240 hours for 720 cycles, far outperforming those of the state-of-the-art solid-state batteries. The marriage of biomaterials with diversity of ionic liquids creates enormous opportunities to construct advanced SSEs for solid-state batteries.