Lee, Kyunam Serdiuk, Illia E. Eo, Joohwan Jo, Dong Hyeon Kim, Jihyeon Min, Dong Joo Park, Hyunji Lee, Sojeong Kang, Myeongju Jang, Gun Ra, Sooyeon Park, Sang Kyu Kim, Sang- Ok Park, Ho Seok Kang, Kisuk Park, Soo Young Kwon, Ji Eon 2026-05-07T09:00:10Z 2026-05-07T09:00:10Z 2026-05-07 2026-03 1613-6810 https://pubs.kist.re.kr/handle/201004/154642 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 nonconjugated polymeric structures without generating any by-products. Notably, the in situ electrochemical coupling during the cell operation not only yields insoluble crosslinked polymers of V3PXZ but also unexpectedly forms nanostructures with high surface area in the electrode. This self-nanostructuring behavior of V3PXZ enables us to prepare aqueous-processed V3PXZ cathodes, achieving exceptionally high cycling stability and rate capability (charging 56% of capacity in 36 s) even with high active content (>70 wt.%). English Wiley - V C H Verlag GmbbH & Co. In Situ Self-Nanostructuring Enables Fast-Recharging of an Aqueous-Processed Organic Small Molecule Cathode Article 10.1002/smll.202513662 1 Small Small N scie scopus 2-s2.0-105033846498 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article; Early Access ELECTROCHEMICAL ENERGY-STORAGE BATTERIES TRIPHENYLAMINE CYCLOADDITION PHENOXAZINE POLYMERS CHARGE electrochemical polymerization organic battery organic electrode phenoxazine postcrosslinking