A Stimulus-Responsive Zinc–Iodine Battery with Smart Overcharge Self-Protection Function

Faxing Wang; Jochi Tseng; Zaichun Liu; Panpan Zhang; Gang Wang; Guangbo Chen; Weixing Wu; Minghao Yu; Yuping Wu; Xinliang Feng

doi:10.1002/adma.202000287

A Stimulus-Responsive Zinc–Iodine Battery with Smart Overcharge Self-Protection Function

Faxing Wang, Jochi Tseng, Zaichun Liu, Panpan Zhang, Gang Wang, Guangbo Chen, Weixing Wu, Minghao Yu, Yuping Wu, Xinliang Feng

School of energy science and engineering

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

134 Scopus citations

Abstract

Zinc–iodine aqueous batteries (ZIABs) are highly attractive for grid-scale energy storage due to their high theoretical capacities, environmental friendliness, and intrinsic non-flammability. However, because of the close redox potential of Zn stripping/platting and hydrogen evolution, slight overcharge of ZIABs would induce drastic side reactions, serious safety concerns, and battery failure. A novel type of stimulus-responsive zinc–iodine aqueous battery (SR-ZIAB) with fast overcharge self-protection ability is demonstrated by employing a smart pH-responsive electrolyte. Operando spectroelectrochemical characterizations reveal that the battery failure mechanism of ZIABs during overcharge arises from the increase of electrolyte pH induced by hydrogen evolution as well as the consequent irreversible formation of insulating ZnO at anode and soluble Zn(IO₃)₂ at cathode. Under overcharge conditions, the designed SR-ZIABs can be rapidly switched off with capacity degrading to 6% of the initial capacity, thereby avoiding continuous battery damage. Importantly, SR-ZIABs can be switched on with nearly 100% of capacity recovery by re-adjusting the electrolyte pH. This work will inspire the development of aqueous Zn batteries with smart self-protection ability in the overcharge state.

Original language	English
Article number	2000287
Journal	Advanced Materials
Volume	32
Issue number	16
DOIs	https://doi.org/10.1002/adma.202000287
State	Published - 1 Apr 2020

Keywords

Zn anodes
battery overchange
battery self-protection
metal-I batteries
stimulus-responsive batteries

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10.1002/adma.202000287

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title = "A Stimulus-Responsive Zinc–Iodine Battery with Smart Overcharge Self-Protection Function",

abstract = "Zinc–iodine aqueous batteries (ZIABs) are highly attractive for grid-scale energy storage due to their high theoretical capacities, environmental friendliness, and intrinsic non-flammability. However, because of the close redox potential of Zn stripping/platting and hydrogen evolution, slight overcharge of ZIABs would induce drastic side reactions, serious safety concerns, and battery failure. A novel type of stimulus-responsive zinc–iodine aqueous battery (SR-ZIAB) with fast overcharge self-protection ability is demonstrated by employing a smart pH-responsive electrolyte. Operando spectroelectrochemical characterizations reveal that the battery failure mechanism of ZIABs during overcharge arises from the increase of electrolyte pH induced by hydrogen evolution as well as the consequent irreversible formation of insulating ZnO at anode and soluble Zn(IO3)2 at cathode. Under overcharge conditions, the designed SR-ZIABs can be rapidly switched off with capacity degrading to 6% of the initial capacity, thereby avoiding continuous battery damage. Importantly, SR-ZIABs can be switched on with nearly 100% of capacity recovery by re-adjusting the electrolyte pH. This work will inspire the development of aqueous Zn batteries with smart self-protection ability in the overcharge state.",

keywords = "Zn anodes, battery overchange, battery self-protection, metal-I batteries, stimulus-responsive batteries",

author = "Faxing Wang and Jochi Tseng and Zaichun Liu and Panpan Zhang and Gang Wang and Guangbo Chen and Weixing Wu and Minghao Yu and Yuping Wu and Xinliang Feng",

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AU - Wang, Faxing

AU - Tseng, Jochi

AU - Liu, Zaichun

AU - Zhang, Panpan

AU - Wang, Gang

AU - Chen, Guangbo

AU - Wu, Weixing

AU - Yu, Minghao

AU - Wu, Yuping

AU - Feng, Xinliang

PY - 2020/4/1

Y1 - 2020/4/1

N2 - Zinc–iodine aqueous batteries (ZIABs) are highly attractive for grid-scale energy storage due to their high theoretical capacities, environmental friendliness, and intrinsic non-flammability. However, because of the close redox potential of Zn stripping/platting and hydrogen evolution, slight overcharge of ZIABs would induce drastic side reactions, serious safety concerns, and battery failure. A novel type of stimulus-responsive zinc–iodine aqueous battery (SR-ZIAB) with fast overcharge self-protection ability is demonstrated by employing a smart pH-responsive electrolyte. Operando spectroelectrochemical characterizations reveal that the battery failure mechanism of ZIABs during overcharge arises from the increase of electrolyte pH induced by hydrogen evolution as well as the consequent irreversible formation of insulating ZnO at anode and soluble Zn(IO3)2 at cathode. Under overcharge conditions, the designed SR-ZIABs can be rapidly switched off with capacity degrading to 6% of the initial capacity, thereby avoiding continuous battery damage. Importantly, SR-ZIABs can be switched on with nearly 100% of capacity recovery by re-adjusting the electrolyte pH. This work will inspire the development of aqueous Zn batteries with smart self-protection ability in the overcharge state.

AB - Zinc–iodine aqueous batteries (ZIABs) are highly attractive for grid-scale energy storage due to their high theoretical capacities, environmental friendliness, and intrinsic non-flammability. However, because of the close redox potential of Zn stripping/platting and hydrogen evolution, slight overcharge of ZIABs would induce drastic side reactions, serious safety concerns, and battery failure. A novel type of stimulus-responsive zinc–iodine aqueous battery (SR-ZIAB) with fast overcharge self-protection ability is demonstrated by employing a smart pH-responsive electrolyte. Operando spectroelectrochemical characterizations reveal that the battery failure mechanism of ZIABs during overcharge arises from the increase of electrolyte pH induced by hydrogen evolution as well as the consequent irreversible formation of insulating ZnO at anode and soluble Zn(IO3)2 at cathode. Under overcharge conditions, the designed SR-ZIABs can be rapidly switched off with capacity degrading to 6% of the initial capacity, thereby avoiding continuous battery damage. Importantly, SR-ZIABs can be switched on with nearly 100% of capacity recovery by re-adjusting the electrolyte pH. This work will inspire the development of aqueous Zn batteries with smart self-protection ability in the overcharge state.

KW - Zn anodes

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KW - battery self-protection

KW - metal-I batteries

KW - stimulus-responsive batteries

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A Stimulus-Responsive Zinc–Iodine Battery with Smart Overcharge Self-Protection Function

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