Cathodic Zn underpotential deposition: an evitable degradation mechanism in aqueous zinc-ion batteries

Shaohua Zhu; Yuhang Dai; Jinghao Li; Chumei Ye; Wanhai Zhou; Ruohan Yu; Xiaobin Liao; Jiantao Li; Wei Zhang; Wei Zong; Ruwei Chen; Guanjie He; Dongliang Chao; Qinyou An

doi:10.1016/j.scib.2022.08.023

Cathodic Zn underpotential deposition: an evitable degradation mechanism in aqueous zinc-ion batteries

Shaohua Zhu, Yuhang Dai, Jinghao Li, Chumei Ye, Wanhai Zhou, Ruohan Yu, Xiaobin Liao, Jiantao Li, Wei Zhang, Wei Zong, Ruwei Chen, Guanjie He^*, Dongliang Chao, Qinyou An

^*Corresponding author for this work

Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

64 Scopus citations

Abstract

Aqueous zinc-ion batteries (AZIBs) are promising for large-scale energy storage, but their development is plagued by inadequate cycle life. Here, for the first time, we reveal an unusual phenomenon of cathodic underpotential deposition (UPD) of Zn, which is highly irreversible and considered the origin of the inferior cycling stability of AZIBs. Combining experimental and theoretical simulation approaches, we propose that the UPD process agrees with a two-dimensional nucleation and growth model, following a thermodynamically feasible mechanism. Furthermore, the universality of Zn UPD is identified in systems, including VO₂//Zn, TiO₂//Zn, and SnO₂//Zn. In practice, we propose and successfully implement removing cathodic Zn UPD and substantially mitigate the degradation of the battery by controlling the end-of-discharge voltage. This work provides new insights into AZIBs degradation and brings the cathodic UPD behavior of rechargeable batteries into the limelight.

Original language	English (US)
Pages (from-to)	1882-1889
Number of pages	8
Journal	Science Bulletin
Volume	67
Issue number	18
DOIs	https://doi.org/10.1016/j.scib.2022.08.023
State	Published - Sep 30 2022

Funding

This work was supported by the National Key Research and Development Program of China ( 2020YFA0715000 and 2016YFA0202603 ) and the National Natural Science Foundation of China ( 51832004 , 51521001 , and 22109029 ).

Keywords

Aqueous battery
Degradation mechanism
Underpotential deposition
Zinc-ion battery
Zn metal deposition

ASJC Scopus subject areas

General

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10.1016/j.scib.2022.08.023

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title = "Cathodic Zn underpotential deposition: an evitable degradation mechanism in aqueous zinc-ion batteries",

abstract = "Aqueous zinc-ion batteries (AZIBs) are promising for large-scale energy storage, but their development is plagued by inadequate cycle life. Here, for the first time, we reveal an unusual phenomenon of cathodic underpotential deposition (UPD) of Zn, which is highly irreversible and considered the origin of the inferior cycling stability of AZIBs. Combining experimental and theoretical simulation approaches, we propose that the UPD process agrees with a two-dimensional nucleation and growth model, following a thermodynamically feasible mechanism. Furthermore, the universality of Zn UPD is identified in systems, including VO2//Zn, TiO2//Zn, and SnO2//Zn. In practice, we propose and successfully implement removing cathodic Zn UPD and substantially mitigate the degradation of the battery by controlling the end-of-discharge voltage. This work provides new insights into AZIBs degradation and brings the cathodic UPD behavior of rechargeable batteries into the limelight.",

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author = "Shaohua Zhu and Yuhang Dai and Jinghao Li and Chumei Ye and Wanhai Zhou and Ruohan Yu and Xiaobin Liao and Jiantao Li and Wei Zhang and Wei Zong and Ruwei Chen and Guanjie He and Dongliang Chao and Qinyou An",

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doi = "10.1016/j.scib.2022.08.023",

language = "English (US)",

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T1 - Cathodic Zn underpotential deposition

T2 - an evitable degradation mechanism in aqueous zinc-ion batteries

AU - Zhu, Shaohua

AU - Dai, Yuhang

AU - Li, Jinghao

AU - Ye, Chumei

AU - Zhou, Wanhai

AU - Yu, Ruohan

AU - Liao, Xiaobin

AU - Li, Jiantao

AU - Zhang, Wei

AU - Zong, Wei

AU - Chen, Ruwei

AU - He, Guanjie

AU - Chao, Dongliang

AU - An, Qinyou

PY - 2022/9/30

Y1 - 2022/9/30

N2 - Aqueous zinc-ion batteries (AZIBs) are promising for large-scale energy storage, but their development is plagued by inadequate cycle life. Here, for the first time, we reveal an unusual phenomenon of cathodic underpotential deposition (UPD) of Zn, which is highly irreversible and considered the origin of the inferior cycling stability of AZIBs. Combining experimental and theoretical simulation approaches, we propose that the UPD process agrees with a two-dimensional nucleation and growth model, following a thermodynamically feasible mechanism. Furthermore, the universality of Zn UPD is identified in systems, including VO2//Zn, TiO2//Zn, and SnO2//Zn. In practice, we propose and successfully implement removing cathodic Zn UPD and substantially mitigate the degradation of the battery by controlling the end-of-discharge voltage. This work provides new insights into AZIBs degradation and brings the cathodic UPD behavior of rechargeable batteries into the limelight.

AB - Aqueous zinc-ion batteries (AZIBs) are promising for large-scale energy storage, but their development is plagued by inadequate cycle life. Here, for the first time, we reveal an unusual phenomenon of cathodic underpotential deposition (UPD) of Zn, which is highly irreversible and considered the origin of the inferior cycling stability of AZIBs. Combining experimental and theoretical simulation approaches, we propose that the UPD process agrees with a two-dimensional nucleation and growth model, following a thermodynamically feasible mechanism. Furthermore, the universality of Zn UPD is identified in systems, including VO2//Zn, TiO2//Zn, and SnO2//Zn. In practice, we propose and successfully implement removing cathodic Zn UPD and substantially mitigate the degradation of the battery by controlling the end-of-discharge voltage. This work provides new insights into AZIBs degradation and brings the cathodic UPD behavior of rechargeable batteries into the limelight.

KW - Aqueous battery

KW - Degradation mechanism

KW - Underpotential deposition

KW - Zinc-ion battery

KW - Zn metal deposition

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Cathodic Zn underpotential deposition: an evitable degradation mechanism in aqueous zinc-ion batteries

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