TY  - JOUR
AU  - Korshunov, Aleksandr
AU  - Gibalova, Anna
AU  - Grünebaum, Mariano
AU  - Ravoo, Bart Jan
AU  - Winter, Martin
AU  - Cekic-Laskovic, Isidora
TI  - Host‐Guest Interactions Enhance the Performance of Viologen Electrolytes for Aqueous Organic Redox Flow Batteries
JO  - Batteries & supercaps
VL  - 4
IS  - 6
SN  - 2566-6223
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2021-01152
SP  - 923-928
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000616816100001
DO  - DOI:10.1002/batt.202100018
UR  - https://juser.fz-juelich.de/record/890729
ER  -