Chemical Welding of the Electrode–Electrolyte Interface by Zn-Metal-Initiated In Situ Gelation for Ultralong-Life Zn-Ion Batteries

Yao Qin; Hongfei Li; Cuiping HanFunian MoXin Wang

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Chemical Welding of the Electrode–Electrolyte Interface by Zn-Metal-Initiated In Situ Gelation for Ultralong-Life Zn-Ion Batteries

机译：Chemical Welding of the Electrode–Electrolyte Interface by Zn-Metal-Initiated In Situ Gelation for Ultralong-Life Zn-Ion Batteries

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A compatible and robust electrode–electrolyte interface is favorable in resolving the severe dendritic growth and side reactions of aqueous Zn-ion batteries toward commercial-standard lifespan and charging–discharging rate. Herein, a chemical welding strategy through in situ construction of a gel electrolyte that enables Zn-ion batteries to achieve ultralong life and reversibility is reported. The gel electrolyte is spontaneously formed on the Zn anode surface by redox polymerization with the initiation of Zn metal. The direct participation of the Zn anode in the chemical synthesis of the gel electrolyte brings a well-bonded and water-poor electrode–electrolyte interface, which not only alleviates side reactions but also enables preferential (002) Zn deposition. The in situ symmetric cell thus prepared delivers an ultralong lifespan of 5100 h (>212 days), and a hybrid capacitor with the in situ electrolyte runs smoothly over 40 000 cycles at 20 A g~(?1). Even at an ultrahigh current density of 40 mA cm~(?2) and capacity of 40 mAh cm~(?2), the cell still operates stably for 240 h, alongside a high Zn utilization with 87 depth of discharge. The in situ gel electrolyte integrating robust interface and preparation of all-in-one cells demonstrate a commercializable path for aqueous Zn-storage devices.

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《Advanced Materials》 |2022年第44期|2207118.1-2207118.10|共10页
作者
Yao Qin; Hongfei Li; Cuiping HanFunian MoXin Wang;
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作者单位

Songshan Lake Materials Laboratory Dongguan, Guangdong 523808, China;

Songshan Lake Materials Laboratory Dongguan, Guangdong 523808, China,School of System Design and Intelligent Manufacturing Southern University of Science and echnology Shenzhen, Guangdong 518055, China;

Faculty of Materials Science and Energy Engineering Institute of Technology for Carbon eutrality Shenzhen Institute of Advanced Technology Chinese Academy of Sciences (CAS) Shenzhen, Guangdong 518055, ChinaShenzhen Key Laboratory of Flexible Printed Electronics Technology Center Harbin Institute of Technology Shenzhen, Guangdong 518055, China;

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正文语种英语
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aqueous Zn-storage devices; electrode–electrolyte interfaces; gel electrolytes; in situ polymerization; tough bonding; Zn anodes;

Chemical Welding of the Electrode–Electrolyte Interface by Zn-Metal-Initiated In Situ Gelation for Ultralong-Life Zn-Ion Batteries

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