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The Fast and the Capacious: A [Ni(Salen)]‐TEMPO Redox‐Conducting Polymer for Organic Batteries
Author(s) -
Vereshchagin Anatoliy A.,
Lukyanov Daniil A.,
Kulikov Ilia R.,
Panjwani Naitik A.,
Alekseeva Elena A.,
Behrends Jan,
Levin Oleg V.
Publication year - 2021
Publication title -
batteries and supercaps
Language(s) - English
Resource type - Journals
ISSN - 2566-6223
DOI - 10.1002/batt.202000220
Subject(s) - redox , conductive polymer , polymer , nitroxyl , materials science , electrochemistry , electrical conductor , electron paramagnetic resonance , chemical engineering , polymer chemistry , chemistry , inorganic chemistry , electrode , organic chemistry , nuclear magnetic resonance , physics , engineering , composite material
Redox‐active nitroxyl‐containing polymers are promising candidates as possible replacements for inorganic based energy‐storage materials, due to their high energy density and fast redox kinetics. One challenge towards the implementation of such a system is the insufficient electrical conductivity, impeding the charge collection even with highly conductive additives. Herein, the first implementation of a polymeric bis(salicylideniminato) nickel (NiSalen) conductive backbone as an active charge‐collecting wire is reported. NiSalen simultaneously serves as a charge collector for nitroxyl pendants and supports the redox capacity of the material. This novel polymer exhibits a specific capacity of up to 91.5 mAh g −1 , retaining 87 % of its theoretical capacity at 800 C and more than 30 % at as high as 3000 C (66 % capacity retention after 2000 cycles). The properties of the new material upon operation was studied by means of operando electrochemical methods, UV‐Vis, and electron paramagnetic resonance spectroscopy.