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https://hdl.handle.net/10316/107458
Title: | Sulfonated tryptanthrin anolyte increases performance in pH neutral aqueous redox flow batteries | Authors: | Pinheiro, Daniela Pineiro, Marta Melo, J. Sérgio Seixas de |
Issue Date: | 11-Jun-2021 | Publisher: | Springer Nature | Project: | POCI-01-0145-FEDER-016387 info:eu-repo/grantAgreement/SFRH/BD/74351/2010 UIDB/00313/2020 UIDP/00313/2020 PTDC/ QUI-QFI/31625/2017 |
Serial title, monograph or event: | Communications Chemistry | Volume: | 4 | Issue: | 1 | Abstract: | Aqueous organic redox flow batteries (AORFBs) hold great promise as low-cost, environmentally friendly and safe alternative energy storage media. Here we present aqueous organometallic and all-organic active materials for RFBs with a water-soluble active material, sulfonated tryptanthrin (TRYP-SO3H), working at a neutral pH and showing long-term stability. Electrochemical measurements show that TRYP-SO3H displays reversible peaks at neutral pH values, allowing its use as an anolyte combined with potassium ferrocyanide or 4,5-dihydroxy-1,3-benzenedisulfonic acid disodium salt monohydrate as catholytes. Single cell tests show reproducible charge-discharge cycles for both catholytes, with significantly improved results for the aqueous all-organic RFB reaching high cell voltage (0.94 V) and high energy efficiencies, stabilized during at least 50 working cycles. | URI: | https://hdl.handle.net/10316/107458 | ISSN: | 2399-3669 | DOI: | 10.1038/s42004-021-00523-0 | Rights: | openAccess |
Appears in Collections: | I&D CQC - Artigos em Revistas Internacionais |
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Pinheiro2021Commun Chem.pdf | 2.08 MB | Adobe PDF | View/Open |
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