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1D/2D composite subnanometer channels for ion transport:The role of confined water

Nano Research 2023年第8期16卷 10913-10921页

作者： Yuhao Li Xiaorui Jin Xinhai Yan Xinyu Ai Xin Yang Zi-Jian Zheng Kun Huang Gaofeng Zhao Yongan Yang Meiling Wu Kai-Ge Zhou Institute of Molecular Plus Department of ChemistryTianjin UniversityTianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Key Laboratory of Polymer MaterialsHubei UniversityWuhan 430062China School of Chemical Engineering and Analytical Science National Graphene InstituteUniversity of ManchesterManchesterM139PLUK School of Civil Engineering Tianjin UniversityTianjin 300072China

As a mass transport media,water is an alternative of organic solvent applied in rechargeable batteries,due to its unique properties,including fast ionic migration,easy-processibility,economic/environmental friendliness,and flame ***,due to the high activity of water molecules in aqueous electrolytes,the corrosion of metal anode,side reactions,and inferior metal electrodeposition behavior leads to unstable cycling performance,poor Coulombic efficiency(CE),and early-staged failure of *** several attempts to regulate the activity of water,migration of ions is sacrificed,due to the limited methods to control the water ***,we developed a subnanoscale confinement strategy based on a nacre-like structure to modulate the activity of water in the solid *** tuning the ratio between the two-dimensional(2D)vermiculite and one-dimensional(1D)cellulose nanofibers(CNFs),the capillary size in the 1D/2D structure is altered to achieve a fast Zn^(2+)*** dielectric relaxation and molecular dynamics studies indicate that the enhanced Zn^(2+)conductivity is attributed to the fast water relaxation in the precisely defined 1D/2D *** advantage of the regulated activity of the confined water in 2D capillary,the composite vermiculite membrane can suppress the corrosion and side reactions between Zn electrode and water molecular,endowing a reversible Zn^(2+)stripping/plating behavior and a stable cycling performance for 900 *** on our confinement strategy to control the water states by 1D/2D structures,this work will open an avenue toward aqueous energy storage devices with excellent reversibility,high safety,and long-term stability.

关键词： ion transport subnanometer channels confined water aqueous electrolyte limited side reactions

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