A Hydroxylated Tetracationic Viologen based on Dimethylaminoethanol as a Negolyte for Aqueous Flow Batteries
Source abstract
Abstract
Abstract A tetracationic viologen based on dimethylaminoethanol is reported as a novel negolyte for aqueous‐organic flow batteries. The compound (1,1′‐bis(3‐((2‐hydroxyethyl)dimethylammonio)propyl)‐[4,4′‐bipyridine]‐1,1′‐diium tetrachloride), termed [(DMAE‐Pr)2‐Vi]Cl4, was prepared by replacing the trimethylammonium groups of a former analogue for dimethylaminoethanol derivatives as permanently charged moieties, improving its solubility and modifying its electronic structure, as revealed by DFT calculations. Its electrochemical properties and diffusion coefficient were investigated by voltammetry and DOSY. The battery concept was demonstrated by pairing [(DMAE‐Pr)2‐Vi]Cl4 with a TEMPOL posolyte using a low‐cost anion exchange membrane and a neutral‐pH supporting electrolyte. [(DMAE‐Pr)2‐Vi]Cl4 has great potential for enhancing energy density in viologen flow batteries.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced battery technologies research · Electrocatalysts for Energy Conversion · Electrochemical Analysis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Organic Chemistry Clausthal University of Technology Leibnizstraße 6 38678 Clausthal-Zellerfeld Germany
Institute of Chemical and Electrochemical Process Engineering Clausthal University of Technology Leibnizstraße 17 38678 Clausthal-Zellerfeld Germany
Research Center for Energy Storage Technologies Clausthal University of Technology Am Stollen 19 A 38640 Goslar Germany
Funding
Alexander von Humboldt-Stiftung
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