Electrochemical Performance of a New Triazole Functionalized Ferrocene in Aqueous Redox Flow Batteries - UTU Research Portal

A1 Refereed original research article in a scientific journal

Electrochemical Performance of a New Triazole Functionalized Ferrocene in Aqueous Redox Flow Batteries

Authors: Eken, Taha Yasin; Gonzalez, Gabriel; Peljo, Pekka; Koz, Gamze

Publisher: WILEY

Publishing place: HOBOKEN

Publication year: 2025

Journal: Applied Organometallic Chemistry

Journal name in source: APPLIED ORGANOMETALLIC CHEMISTRY

Journal acronym: APPL ORGANOMET CHEM

Article number: e7820

Volume: 39

Issue: 2

Number of pages: 7

ISSN: 0268-2605

eISSN: 1099-0739

DOI: https://doi.org/10.1002/aoc.7820

Web address : https://doi.org/10.1002/aoc.7820

Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/458589461

Abstract

A new 1,2,3-triazole functionalized ferrocene (1,2,3-TAFc) produced by Cu(I)-catalyzed click reaction was investigated as positive electrolyte for aqueous organic flow batteries (AOFBs). The molecule is highly soluble in 1 M hydrochloric acid and displays high electrochemical reversibility. 1,2,3-TAFc demonstrated good stability during cycling with a low capacity decay (0.011%/cyc, 3.0%/day) and high Coulombic efficiency (99.4%) over 280 cycles when tested in a flow battery at low concentration. This low capacity decay was attributed to the instability of ferrocene. These findings indicate that a stable and water-soluble catholyte for AOFBs can be obtained with structural modifications of 1,2,3-TAFc.A new type of ferrocene catholyte for AOFBs based on a 1,2,3-triazole moiety was introduced. 1,2,3-TAFc was prepared easily via click chemistry with a one-pot, two steps reaction sequence with 73% overall yield. The CV and flow battery experiments demonstrated the reversible and stable nature of the material. The cycling battery tests show a high stability of 1,2,3-TAFc in acidic electrolyte with low capacity decay (0.011%/cyc) and high Coulombic efficiency (99.4%).image

Downloadable publication

This is an electronic reprint of the original article.
This reprint may differ from the original in pagination and typographic detail. Please cite the original version.

Applied Organom Chemis - 2024 - Eken - Electrochemical Performance of a New Triazole Functionalized Ferrocene in Aqueous.pdf

Funding information in the publication:
We are grateful to the Bursa Technical University Scientific Research Fund (Project No. 231N002) for financial support. G. G. gratefully acknowledges the financial support from the University of Turku Graduate School. P. P. gratefully acknowledges the financial support from European Research Council Starting Grant (agreement no. 950038). This work partly utilized the Materials Research Infrastructure (MARI) at the University of Turku.