%0 Journal Article
%A Korshunov, Aleksandr
%A Gibalova, Anna
%A Grünebaum, Mariano
%A Ravoo, Bart Jan
%A Winter, Martin
%A Cekic-Laskovic, Isidora
%T Host‐Guest Interactions Enhance the Performance of Viologen Electrolytes for Aqueous Organic Redox Flow Batteries
%J Batteries & supercaps
%V 4
%N 6
%@ 2566-6223
%C Weinheim
%I Wiley-VCH
%M FZJ-2021-01152
%P 923-928
%D 2021
%X Host-guest interactions are an attractive approach to design redox electrolytes, enabling to precisely tune the key properties for redox flow batteries such as half-cell redox potential, solubility, and stability. Herein we report a host-guest complex of highly water soluble (2-hydroxypropyl)-β-cyclodextrin with 1-decyl-1′-ethyl-4,4′-bipyridinium dibromide as anolyte in a new aqueous organic redox flow battery (AORFB). The supramolecular anolyte ensured the total RFB voltage increase of ≈9 % up to 0.97 V and provided a stable capacity delivery for more than 500 cycles with a capacity fade rate of 0.037 %/cycle (2.84 %/day) at high Coulombic (>99.5 %) and energy (>62 %) efficiencies. The results highlight host-guest interactions as promising strategy towards more effective storage of renewable energy within AORFBs.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000616816100001
%R 10.1002/batt.202100018
%U https://juser.fz-juelich.de/record/890729