Abstract
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.
基金项目
Jilin Provincial Natural Fund(20230101205JC)
Chongqing Natural Science Foundation(cstc2022jcyjmsxmX0184)
Chongqing Natural Science Foundation(CSTB2022NSCQ-MSX0241)
International Cooperation Foundation of science and Technology Department of Jilin Province(20220402026GH)
维普
万方数据