Engineering Directional Ion Transport Channels in Three-Dimensional Covalent Organic Frameworks for High-Performance Sodium-Ion Batteries.
Covalent organic frameworks (COFs) with abundant redox-active sites are promising electrode materials for sodium-ion batteries (SIBs). However, conventional design strategies are often limited by sluggish Na+ transport and low utilization of active sites. Here, we report a pair of 3D COFs (COF-O and COF-H). In COF-O, t...