Trade-off between H<sub>2</sub>O-rich and H<sub>2</sub>O-poor electric double layers enables highly reversible Zn anodes in aqueous Zn-ion batteries

Qi, Kaiwen; Liang, Pengrui; Wei, Shiqiang; Ao, Huaisheng; Ding, Xuan; Chen, Shiyuan; Fan, Zhechen; Wang, Chengming; Song, Li; Wu, Xiaojun; Wu, Changzheng; Zhu, Yongchun

doi:10.1039/d4ee00147h

Energy Environ. Sci.

2024

DOI: 10.1039/d4ee00147h

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Trade-off between H₂O-rich and H₂O-poor electric double layers enables highly reversible Zn anodes in aqueous Zn-ion batteries

Kaiwen Qi,

Pengrui Liang,

Shiqiang Wei

et al.

Abstract: Trade-off between H2O-rich and H2O-poor EDLs to balance dead Zn and dendrites and side reactions, realizing highly reversible Zn anodes.

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Cited by 12 publications

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Scavenging Energy and Information through Dynamically Regulating the Electrical Double Layer

Li,

Wang,

Wei

2024

Adv Funct Materials

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The electrical double layer (EDL) between solids and liquids serves as the primary interface for ionic‐electronic coupling and is pivotal in nanoscale phenomena, governing electric field effects, ion transport, surface interactions, etc. Dynamically regulating the EDL through mechanical or electrostatic methods can influence charge carrier behavior, thereby impacting energy scavenging and storage processes. This regulation enabled efficient energy scavenging by governing ionic migration and optimizing charge carrier concentration at the interface, presenting a novel avenue to achieve efficient energy and information flow. Here, various scavenging energy and information devices through dynamically regulating the EDL are systematically reviewed. They are classified into three groups by regulating the distribution and movement of charge carriers throughout the entire EDL, diffuse layer, and Debye length range. The review provided a comprehensive overview of the operating principles, influencing factors, output characteristics, and typical applications, along with a discussion on future challenges. This holistic examination offers researchers valuable insights for evaluating their applicability in various scenarios.

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Scavenging Energy and Information through Dynamically Regulating the Electrical Double Layer

Li,

Wang,

Wei

2024

Adv Funct Materials

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Boosting Dendrite‐Free Zinc Anode with Strongly Polar Functional Group Terminated Hydrogel Electrolyte for High‐Safe Aqueous Zinc‐Ion Batteries

Li,

Zhang,

Liu

et al. 2024

Adv Funct Materials

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Aqueous zinc‐ion batteries (AZIBs) have become a promising energy storage device due to their low cost and high security. However, the severe dendrite growth and side reactions on metallic zinc (Zn) anode hamper their commercial implementation. Herein, a strongly electronegative trifluoroborate anion (─BF3−) functionalized polyacrylamide hydrogel (PAME) is well‐designed and constructed as the quasi‐solid‐state electrolyte to overcome these obstacles. The PAME chain segments terminated with strongly polar functional groups promote the conversion of water molecules from free water to bound water through the enhanced hydrogen bonding interaction to alleviate the side reactions. Furthermore, the PAME electrolyte featured with hierarchically porous structure and enhanced electrostatic interaction among the ─BF3− groups, and Zn2+ ions homogenizes the high‐flux Zn ion transport and induce the uniform deposition to restrain dendrite growth. Consequently, the assembled Zn‖PAME‖Zn batteries deliver remarkable cycling stability over 1800 h at 1 mA cm−2 and 900 h at 15 mA cm−2. Additionally, the constructed Zn‖PAME‖MnO2 full cells achieve a reversible capacity of 202 mAh g−1 at 2.0 A g−1 with a capacity retention rate of 91.4% over 500 cycles. This work sheds light on constructing the strongly polar hydrogel electrolyte to boost free‐dendrite Zn anodes for long‐lifespan AZIBs.

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Switching Hydrophobic Interface with Ionic Valves for Reversible Zinc Batteries

Tang,

Zhang,

Han

et al. 2024

Advanced Materials

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Developing hydrophobic interface has proven effective in addressing dendrite growth and side reactions during zinc (Zn) plating in aqueous Zn batteries. However, this solution inadvertently impedes the solvation of Zn2+ with H2O and subsequent ionic transport during Zn stripping, leading to insufficient reversibility. Herein, an adaptive hydrophobic interface that can be switched “on” and “off” by ionic valves to accommodate the varying demands for interfacial H2O during both the Zn plating and stripping processes, is proposed. This concept is validated using octyltrimethyl ammonium bromide (C8TAB) as the ionic valve, which can initiatively establish and remove a hydrophobic interface in response to distinct electric‐field directions during Zn plating and stripping, respectively. Consequently, the Zn anode exhibits an extended cycling life of over 2500 h with a high Coulombic efficiency of ≈99.8%. The full cells also show impressive capacity retention of over 85% after 1 000 cycles at 5 A g−1. These findings provide a new insight into interface design for aqueous metal batteries.

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Trade-off between H₂O-rich and H₂O-poor electric double layers enables highly reversible Zn anodes in aqueous Zn-ion batteries

Abstract: Trade-off between H2O-rich and H2O-poor EDLs to balance dead Zn and dendrites and side reactions, realizing highly reversible Zn anodes.

Cited by 12 publications

References 49 publications

Scavenging Energy and Information through Dynamically Regulating the Electrical Double Layer

Scavenging Energy and Information through Dynamically Regulating the Electrical Double Layer

Boosting Dendrite‐Free Zinc Anode with Strongly Polar Functional Group Terminated Hydrogel Electrolyte for High‐Safe Aqueous Zinc‐Ion Batteries

Switching Hydrophobic Interface with Ionic Valves for Reversible Zinc Batteries

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Trade-off between H2O-rich and H2O-poor electric double layers enables highly reversible Zn anodes in aqueous Zn-ion batteries

Abstract: Trade-off between H2O-rich and H2O-poor EDLs to balance dead Zn and dendrites and side reactions, realizing highly reversible Zn anodes.

Cited by 12 publications

References 49 publications

Scavenging Energy and Information through Dynamically Regulating the Electrical Double Layer

Scavenging Energy and Information through Dynamically Regulating the Electrical Double Layer

Boosting Dendrite‐Free Zinc Anode with Strongly Polar Functional Group Terminated Hydrogel Electrolyte for High‐Safe Aqueous Zinc‐Ion Batteries

Switching Hydrophobic Interface with Ionic Valves for Reversible Zinc Batteries

Contact Info

Product

Resources

About

Trade-off between H₂O-rich and H₂O-poor electric double layers enables highly reversible Zn anodes in aqueous Zn-ion batteries