Hydrophilic silica spheres layer as ions shunt for enhanced Zn metal anode

Xu Han; Huitao Leng; Ying Qi; Pan Yang; Jingxia Qiu; Bing Zheng; Jiansheng Wu; Sheng Li; Fengwei Huo

doi:10.1016/j.cej.2021.133931

Hydrophilic silica spheres layer as ions shunt for enhanced Zn metal anode

Xu Han, Huitao Leng, Ying Qi, Pan Yang, Jingxia Qiu, Bing Zheng, Jiansheng Wu, Sheng Li, Fengwei Huo

SCHOOL OF FLEXIBLE ELECTRONICS(FUTURE TECHNOLOGIES)|INSTITUTE OF ADVANCED MATERIALS(IAM)

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

70 Scopus citations

Abstract

Aqueous Zn ion batteries (AZIBs) have been widely studied due to their high safety, suitable redox potential and high theoretical capacity. As the most commonly used anode for AZIBs, Zn foil suffers from severe dendrites growth and undesired side reactions, causing battery failure. In this work, a coating layer of stacked SiO₂ spheres is designed on a Zn metal surface (SiO₂@Zn). The hydrophilic coating layer improves the electrolyte wettability of the Zn anode. Besides, it acts as ions shunt to lead Zn ions evenly plating between the coating layer and the metal anode, avoiding dendrites growth. With electrochemical characterizations and in-situ optical microscopy observations, the electrode presents a stable voltage profile and a long cycling life (2000 h at 0.5 mA cm⁻²), and the capacity decay in a full cell is significantly alleviated.

Original language	English
Article number	133931
Journal	Chemical Engineering Journal
Volume	431
DOIs	https://doi.org/10.1016/j.cej.2021.133931
State	Published - 1 Mar 2022

Keywords

Anode Protection
Aqueous Zn ion batteries
Coating Layer
Zn anode
Zn dendrites

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10.1016/j.cej.2021.133931

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title = "Hydrophilic silica spheres layer as ions shunt for enhanced Zn metal anode",

abstract = "Aqueous Zn ion batteries (AZIBs) have been widely studied due to their high safety, suitable redox potential and high theoretical capacity. As the most commonly used anode for AZIBs, Zn foil suffers from severe dendrites growth and undesired side reactions, causing battery failure. In this work, a coating layer of stacked SiO2 spheres is designed on a Zn metal surface (SiO2@Zn). The hydrophilic coating layer improves the electrolyte wettability of the Zn anode. Besides, it acts as ions shunt to lead Zn ions evenly plating between the coating layer and the metal anode, avoiding dendrites growth. With electrochemical characterizations and in-situ optical microscopy observations, the electrode presents a stable voltage profile and a long cycling life (2000 h at 0.5 mA cm−2), and the capacity decay in a full cell is significantly alleviated.",

keywords = "Anode Protection, Aqueous Zn ion batteries, Coating Layer, Zn anode, Zn dendrites",

author = "Xu Han and Huitao Leng and Ying Qi and Pan Yang and Jingxia Qiu and Bing Zheng and Jiansheng Wu and Sheng Li and Fengwei Huo",

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doi = "10.1016/j.cej.2021.133931",

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TY - JOUR

T1 - Hydrophilic silica spheres layer as ions shunt for enhanced Zn metal anode

AU - Han, Xu

AU - Leng, Huitao

AU - Qi, Ying

AU - Yang, Pan

AU - Qiu, Jingxia

AU - Zheng, Bing

AU - Wu, Jiansheng

AU - Li, Sheng

AU - Huo, Fengwei

PY - 2022/3/1

Y1 - 2022/3/1

N2 - Aqueous Zn ion batteries (AZIBs) have been widely studied due to their high safety, suitable redox potential and high theoretical capacity. As the most commonly used anode for AZIBs, Zn foil suffers from severe dendrites growth and undesired side reactions, causing battery failure. In this work, a coating layer of stacked SiO2 spheres is designed on a Zn metal surface (SiO2@Zn). The hydrophilic coating layer improves the electrolyte wettability of the Zn anode. Besides, it acts as ions shunt to lead Zn ions evenly plating between the coating layer and the metal anode, avoiding dendrites growth. With electrochemical characterizations and in-situ optical microscopy observations, the electrode presents a stable voltage profile and a long cycling life (2000 h at 0.5 mA cm−2), and the capacity decay in a full cell is significantly alleviated.

AB - Aqueous Zn ion batteries (AZIBs) have been widely studied due to their high safety, suitable redox potential and high theoretical capacity. As the most commonly used anode for AZIBs, Zn foil suffers from severe dendrites growth and undesired side reactions, causing battery failure. In this work, a coating layer of stacked SiO2 spheres is designed on a Zn metal surface (SiO2@Zn). The hydrophilic coating layer improves the electrolyte wettability of the Zn anode. Besides, it acts as ions shunt to lead Zn ions evenly plating between the coating layer and the metal anode, avoiding dendrites growth. With electrochemical characterizations and in-situ optical microscopy observations, the electrode presents a stable voltage profile and a long cycling life (2000 h at 0.5 mA cm−2), and the capacity decay in a full cell is significantly alleviated.

KW - Anode Protection

KW - Aqueous Zn ion batteries

KW - Coating Layer

KW - Zn anode

KW - Zn dendrites

UR - http://www.scopus.com/inward/record.url?scp=85120914511&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2021.133931

DO - 10.1016/j.cej.2021.133931

M3 - 文章

AN - SCOPUS:85120914511

SN - 1385-8947

VL - 431

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

M1 - 133931

ER -

Hydrophilic silica spheres layer as ions shunt for enhanced Zn metal anode

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Keywords

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