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Electrochromic Poly(chalcogenoviologen)s as Anode Materials for High‐Performance Organic Radical Lithium‐Ion Batteries
Author(s) -
Li Guoping,
Zhang Bingjie,
Wang Jianwei,
Zhao Hongyang,
Ma Wenqiang,
Xu Letian,
Zhang Weidong,
Zhou Kun,
Du Yaping,
He Gang
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201903152
Subject(s) - electrochromism , anode , viologen , electrolyte , redox , electrochromic devices , faraday efficiency , lithium (medication) , materials science , electrochemistry , organic radical battery , chemical engineering , ion , electrode , nanotechnology , chemistry , photochemistry , organic chemistry , medicine , engineering , metallurgy , endocrinology
A series of electrochromic electron‐accepting poly(chalcogenoviologen)s with multiple, stable, and reversible redox centers were used as anodic materials in organic radical lithium‐ion batteries (ORLIBs). The introduction of heavy atoms (S, Se, and Te) into the viologen scaffold significantly improved the capacity and cycling stability of the ORLIBs. Notably, the poly(Te‐BnV) anode was able to intercalate 20 Li ions and showed higher conductivity and insolubility in the electrolyte, thus contributing to a reversible capacity of 502 mAh g −1 at 100 mA g −1 when the Coulombic efficiency approached 100 %. The charged/discharged state of flexible electrochromic batteries fabricated from these anodic materials could be monitored visually owing to the unique electrochromic and redox properties of the materials. This study opens a promising avenue for the development of organic polymer‐based electrodes for flexible hybrid visual electronics.