Immobilizing polyiodides with expanded Zn2 channels for high-rate practical zinc-iodine battery
Aqueous zinc-iodine battery (AZIB) has the advantage of low cost and high specific capacity but suffer from the soluble polyiodides shuttling and sluggish redox kinetics. Herein, these two limitations are addressed by employing a cathode additive (zirconium hydrogen phosphate, denoted as EI-ZrP) whi...
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sg-ntu-dr.10356-1739462024-03-13T06:29:44Z Immobilizing polyiodides with expanded Zn2 channels for high-rate practical zinc-iodine battery Wu, Jiawen Yang, Jin-Lin Zhang, Bao Fan, Hong Jin School of Physical and Mathematical Sciences Physics Intercalated layered structures Polyiodides shuttling Aqueous zinc-iodine battery (AZIB) has the advantage of low cost and high specific capacity but suffer from the soluble polyiodides shuttling and sluggish redox kinetics. Herein, these two limitations are addressed by employing a cathode additive (zirconium hydrogen phosphate, denoted as EI-ZrP) which provides dual functions: an agent for polyiodide confinement, and abundant channels for zinc ion transport. An enlarged crystalline interlayer (from typical 7.5 to 18.3 Å) of the EI-ZrP significantly enhances the ionic conductivity and simultaneously immobilizes polyiodides, leading to an accelerated conversion process. AZIB with EI-ZrP in the iodine cathode exhibits a high capacity retention over 10,000 cycles (with a 0.02‰ decay rate per cycle). Quasi-solid-state Zn-I2 pouch cell has been constructed using hydrogel-paper as separator and EI-ZrP additive, which delivers a high areal capacity under repeated bending. As a proof-of-concept demonstration, the paper battery is integrated to power a wireless flexible pressure sensor system (WFPSS). This strategy may shed light on the rational design of conversion-type cathode materials for both energy storage and flexible portable electronics. Ministry of Education (MOE) Nanyang Technological University Submitted/Accepted version J. W. acknowledges the research scholarship awarded by the Instituteof Flexible Electronics Technology of Tsinghua, Zhejiang (IFET-THU), Nanyang Technological University (NTU), and Qiantang Science and Technology Innovation Center, China (QSTIC). H.J.F. acknowledges financial support from the Singapore Ministry of Education by Tier 2 (MOE-T2EP50121-0006). J.-L. Y. was thankful for the financial support by the China Scholarship Council (no. 202006210070).. 2024-03-07T07:45:19Z 2024-03-07T07:45:19Z 2024 Journal Article Wu, J., Yang, J., Zhang, B. & Fan, H. J. (2024). Immobilizing polyiodides with expanded Zn2 channels for high-rate practical zinc-iodine battery. Advanced Energy Materials, 14(3), 2302738-. https://dx.doi.org/10.1002/aenm.202302738 1614-6832 https://hdl.handle.net/10356/173946 10.1002/aenm.202302738 2-s2.0-85178179217 3 14 2302738 en MOE-T2EP50121-0006 Advanced Energy Materials doi:10.21979/N9/O6UFAH © 2023 Wiley-VCH GmbH. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at http://doi.org/10.1002/aenm.202302738. application/pdf |
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Physics Intercalated layered structures Polyiodides shuttling Wu, Jiawen Yang, Jin-Lin Zhang, Bao Fan, Hong Jin Immobilizing polyiodides with expanded Zn2 channels for high-rate practical zinc-iodine battery |
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Aqueous zinc-iodine battery (AZIB) has the advantage of low cost and high specific capacity but suffer from the soluble polyiodides shuttling and sluggish redox kinetics. Herein, these two limitations are addressed by employing a cathode additive (zirconium hydrogen phosphate, denoted as EI-ZrP) which provides dual functions: an agent for polyiodide confinement, and abundant channels for zinc ion transport. An enlarged crystalline interlayer (from typical 7.5 to 18.3 Å) of the EI-ZrP significantly enhances the ionic conductivity and simultaneously immobilizes polyiodides, leading to an accelerated conversion process. AZIB with EI-ZrP in the iodine cathode exhibits a high capacity retention over 10,000 cycles (with a 0.02‰ decay rate per cycle). Quasi-solid-state Zn-I2 pouch cell has been constructed using hydrogel-paper as separator and EI-ZrP additive, which delivers a high areal capacity under repeated bending. As a proof-of-concept demonstration, the paper battery is integrated to power a wireless flexible pressure sensor system (WFPSS). This strategy may shed light on the rational design of conversion-type cathode materials for both energy storage and flexible portable electronics. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Wu, Jiawen Yang, Jin-Lin Zhang, Bao Fan, Hong Jin |
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Article |
author |
Wu, Jiawen Yang, Jin-Lin Zhang, Bao Fan, Hong Jin |
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Wu, Jiawen |
title |
Immobilizing polyiodides with expanded Zn2 channels for high-rate practical zinc-iodine battery |
title_short |
Immobilizing polyiodides with expanded Zn2 channels for high-rate practical zinc-iodine battery |
title_full |
Immobilizing polyiodides with expanded Zn2 channels for high-rate practical zinc-iodine battery |
title_fullStr |
Immobilizing polyiodides with expanded Zn2 channels for high-rate practical zinc-iodine battery |
title_full_unstemmed |
Immobilizing polyiodides with expanded Zn2 channels for high-rate practical zinc-iodine battery |
title_sort |
immobilizing polyiodides with expanded zn2 channels for high-rate practical zinc-iodine battery |
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2024 |
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https://hdl.handle.net/10356/173946 |
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