Zhang, L;
Huang, J;
Guo, H;
Ge, L;
Tian, Z;
Zhang, M;
Wang, J;
... Lai, F; + view all
(2023)
Tuning Ion Transport at the Anode-Electrolyte Interface via a Sulfonate-Rich Ion-Exchange Layer for Durable Zinc-Iodine Batteries.
Advanced Energy Materials
, 13
(13)
, Article 2203790. 10.1002/aenm.202203790.
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Abstract
Rechargeable aqueous zinc-iodine batteries (ZIBs) are considered a promising newly-developing energy-storage system, but the corrosion and dendritic growth occurring on the anode seriously hinder their future application. Here, the corrosion mechanism of polyiodide is revealed in detail, showing that it can spontaneously react with zinc and cause rapid battery failure. To address this issue, a sulfonate-rich ion-exchange layer (SC-PSS) is purposely constructed to modulate the transport and reaction chemistry of polyiodide and Zn2+ at the zinc/electrolyte interface. The resulting ZIBs can work properly over 6000 cycles with high-capacity retention (90.2%) and reversibility (99.89%). Theoretical calculations and experimental characterization reveal that the SC-PPS layer blocks polyiodide permeation through electrostatic repulsion, while facilitating desolvation of Zn(H2O)62+ and restricting undesirable 2D diffusion of Zn2+ by chemisorption.
Type: | Article |
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Title: | Tuning Ion Transport at the Anode-Electrolyte Interface via a Sulfonate-Rich Ion-Exchange Layer for Durable Zinc-Iodine Batteries |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1002/aenm.202203790 |
Publisher version: | https://doi.org/10.1002/aenm.202203790 |
Language: | English |
Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | anodic protection, ion-exchange layers, polyiodide corrosion mechanism, zinc-iodine batteries |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
URI: | https://discovery.ucl.ac.uk/id/eprint/10165862 |
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