In Situ Self‐Nanostructuring Enables Fast‐Recharging of an Aqueous‐Processed Organic Small Molecule Cathode

Redox-active organic materials (ROMs) for batteries are emerging as sustainable alternatives to inorganic cathode materials. However, the development of high-performance organic cathodes faces challenges of a trade-off between insolubilizing ROMs for high stability and maintaining their processability. This balance is essential to fabricate uniformly blended electrodes without the formation of large agglomerates, which is crucial for high capacity utilization and rate capability. Herein, we present a small-molecule organic cathode material, 1,3,5-tris(3-vinyl-10H-phenoxazin-10-yl)benzene (V3PXZ), that overcomes this limitation by forming insoluble network polymers through in situ electrochemical crosslinking in the cell after electrode fabrication from a soluble active material. To this end, V3PXZ is delicately designed to undergo a novel electrochemical coupling reaction, forming noncon…