Organic pH Buffer for Dendrite-Free and Shuttle-Free Zn-I₂ Batteries.

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dc.contributor.authorLyu, Y.
dc.contributor.authorYuwono, J.
dc.contributor.authorWang, P.
dc.contributor.authorWang, Y.
dc.contributor.authorYang, F.
dc.contributor.authorLiu, S.
dc.contributor.authorZhang, S.
dc.contributor.authorWang, B.
dc.contributor.authorDavey, K.
dc.contributor.authorMao, J.
dc.contributor.authorGuo, Z.
dc.date.issued2023
dc.descriptionPublished May 2023
dc.description.abstractAqueous Zn-iodine (I2) batteries are attractive for large-scale energy storage. However, drawbacks include, Zn dendrites, hydrogen evolution reaction (HER), corrosion and, cathode 'shuttle' of polyiodines. Here we report a class of N-containing heterocyclic compounds as organic pH buffers to obviate these. We evidence that addition of pyridine /imidazole regulates electrolyte pH, and inhibits HER and anode corrosion. In addition, pyridine and imidazole preferentially absorb on Zn metal, regulating non-dendritic Zn plating /stripping, and achieving a high Coulombic efficiency of 99.6% and long-term cycling stability of 3,200 h at 2 mA cm⁻², 2 mAh cm⁻². It is also confirmed that pyridine inhibits polyiodines shuttling and boosts conversion kinetics for I-/I₂. As a result, the Zn-I₂ full battery exhibits long cycle stability of > 25,000 cycles and high specific capacity of 105.5 mAh g⁻¹ at 10 A g⁻¹. We conclude organic pH buffer engineering is practical for dendrite-free and shuttle-free Zn-I₂ batteries.
dc.description.statementofresponsibilityYanqiu Lyu, Jodie A. Yuwono, Pengtang Wang, Yanyan Wang, Fuhua Yang, Sailin Liu, Shilin Zhang, Baofeng Wang, Kenneth Davey, Jianfeng Mao, and Zaiping Guo
dc.identifier.citationAngewandte Chemie International Edition, 2023; 62(21):e202303011-1-e202303011-10
dc.identifier.doi10.1002/anie.202303011
dc.identifier.issn1433-7851
dc.identifier.issn1521-3773
dc.identifier.orcidLyu, Y. [0000-0002-3812-3976]
dc.identifier.orcidYuwono, J. [0000-0002-0915-0756]
dc.identifier.orcidWang, P. [0009-0008-0824-994X]
dc.identifier.orcidWang, Y. [0000-0003-3236-1516]
dc.identifier.orcidLiu, S. [0000-0003-0025-998X]
dc.identifier.orcidZhang, S. [0000-0002-3268-5708]
dc.identifier.orcidDavey, K. [0000-0002-7623-9320]
dc.identifier.orcidMao, J. [0000-0002-4787-4261]
dc.identifier.orcidGuo, Z. [0000-0003-3464-5301]
dc.identifier.urihttps://hdl.handle.net/2440/138118
dc.language.isoen
dc.publisherWiley-VCH GmbH
dc.relation.granthttp://purl.org/au-research/grants/arc/DP200101862
dc.relation.granthttp://purl.org/au-research/grants/arc/FL210100050
dc.rights© 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
dc.source.urihttps://doi.org/10.1002/anie.202303011
dc.subjectElectrolyte additives
dc.subjectorganic pH buffer
dc.subjectZn metal
dc.subjectZn-iodine batteries
dc.titleOrganic pH Buffer for Dendrite-Free and Shuttle-Free Zn-I₂ Batteries.
dc.title.alternativeOrganic pH Buffer for Dendrite-Free and Shuttle-Free Zn-I2 Batteries
dc.typeJournal article
pubs.publication-statusPublished

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