首页|Molecular crowding electrolytes for stabilizing Zn metal anode in rechargeable aqueous batteries
Molecular crowding electrolytes for stabilizing Zn metal anode in rechargeable aqueous batteries
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A solid electrolyte interphase(SEI)with a robust mechanical property and a high ionic conductivity is imperative for high-performance zinc metal batteries.However,it is difficult to form such a SEI directly from an electrolyte.In this work,a molecular crowding effect is based on the introduction of Zn(OTF)2 and Zn(ClO4)2 to 2mol/L ZnSO4 electrolytes.Simulations and experiments indicate that the Zn(OTF)2 and Zn(ClO4)2 not only create a molecularly crowded electrolyte environment to promote the interaction of Zn2+and OTF-,but also participate in the reduction to construct a robust and high ionic-conductive SEI,thus promoting metal zinc deposition to the(002)crystal surface.With this molecular crowding elec-trolyte,a high current density of 1 mA/cm2 can be obtained by assembling symmetric batteries with Zn as the anode for over 1000h.And in a temperature environment of-10℃,a current density of 1mA/cm2 can be obtained by assembling symmetric batteries with Zn for over 200h.Zn//Bi2S3/VS4@C cells achieve a CE rate of up to 99.81％ over 1000 cycles.Hence,the utilization of a molecular crowding electrolyte is deemed a highly effective approach to fabricating a sophisticated SEI for a zinc anode.
Zinc ion batteriesAnodeElectrolyteSolid electrolyte interphaseMolecular crowding effect
Li Lin、Song-Lin Tian、Zhen-Yu Hu、Yu Zhang、Li-Min Chang、Jia-Jun Wang、Wan-Qiang Liu、Qing-Shuang Wang、Fang Wang
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School of Materials Science and Engineering,Changchun University of Science and Technology,Changchun 130022,China
Key Laboratory of Preparation and Applications of Environmental Friendly Materials of the Ministry of Education,Jilin Normal University,Changchun 130103,China
School of Life Science and Technology,Changchun University of Science and Technology,Changchun 130022,China
Zhongshan Institute of Changchun University of Science and Technology,Zhongshan 528437,China
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Jilin Provincial Natural FundChongqing Natural Science FoundationChongqing Natural Science FoundationInternational Cooperation Foundation of science and Technology Department of Jilin Province
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