Stabilizing Zn Anode Interface by Simultaneously Manipulating the Thermodynamics of Zn Nucleation and Overpotential of Hydrogen Evolution

Huibo Wang; Heng Li; Yuxin TangZhu XuKexuan WangQingyuan LiBingchen HeYi LiuMingzheng GeShi ChenTianwei HaoGuichuan XingYanyan Zhang

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Stabilizing Zn Anode Interface by Simultaneously Manipulating the Thermodynamics of Zn Nucleation and Overpotential of Hydrogen Evolution

机译：Stabilizing Zn Anode Interface by Simultaneously Manipulating the Thermodynamics of Zn Nucleation and Overpotential of Hydrogen Evolution

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The uncontrollable dendrite growth, hydrogen evolution, and other sidereactions, originating from the zinc anode, have severely restricted the practical application of aqueous zinc–ion batteries (ZIBs). To address these challenges, a stable solid-electrolyte-interface (SEI) layer is constructed through introducing sericin molecules as an electrolyte additive to modulate the Zn nucleation and overpotential of hydrogen evolution. This SEI layer increases the nucleation overpotential during Zn plating, leading to the finer-grained, dense, and uniform Zn deposition. Meanwhile, the lower unoccupied molecular orbital molecules in SEI layer have a higher reduction potential than H_2O, inhibiting hydrogen production, and subsequently suppressing the Zn dendritic and interfacial side-reactions. Consequently, the Zn|Zn symmetric cells with sericin additives exhibit an extremely prolonged cycling lifetime of 4446 h compared with to bare Zn electrode of 53 h at 1.0 mA cm~(?2)/1.0 mAh cm~(?2), and a high average Coulombic efficiency of 99.29% under a high cumulative plated capacity of 1.0 Ah cm~(?2) tested in Zn|Cu cells. Moreover, the assembled full cells using Na_2V_6O_(16)·3H_2O cathodes endure 2000 cycles with high capacity retention of 81.7% at 5.0 A g~(?1). This study sheds new light on modulating the process of Zn nucleation and overpotential of H2 evolution for durable Zn anode design.

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来源
《Advanced functional materials》 |2022年第48期|2207898.1-2207898.13|共13页
作者
Huibo Wang; Heng Li; Yuxin TangZhu XuKexuan WangQingyuan LiBingchen HeYi LiuMingzheng GeShi ChenTianwei HaoGuichuan XingYanyan Zhang;
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作者单位

College of Chemical Engineering Fuzhou University Fuzhou 350116, P. R. China,Institute of Applied Physics and Materials Engineering University of Macau Macau 999078, P. R. China;

Institute of Applied Physics and Materials Engineering University of Macau Macau 999078, P. R. China,State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050,;

College of Chemical Engineering Fuzhou University Fuzhou 350116, P. R. China,Fujian Science and Technology Innovation Laboratory for Chemical Engineering of China Quanzhou 362801, P. R. ChinaInstitute of Applied Physics and Materials Engineering University of Macau Macau 999078, P. R. ChinaTechnische Universit?t Chemnitz Institut für Chemie AG Elektrochemie D-09107 Chemnitz, GermanyDepartment of Civil and Environmental Engineering Faculty of Science and Technology University of Macau Macau 999078, P. R. ChinaCollege of Chemical Engineering Fuzhou University Fuzhou 350116, P. R. China;

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正文语种英语
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hydrogen evolution; LUMO energies; nucleation overpotentials; solid electrolyte interfaces; Zn dendrites;

Stabilizing Zn Anode Interface by Simultaneously Manipulating the Thermodynamics of Zn Nucleation and Overpotential of Hydrogen Evolution

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