Dual-phase interface engineering via parallel modulation strategy for highly reversible Zn metal batteries  

作　　者：Zhean Bao Yang Wang Kun Zhang Guosheng Duan Leilei Sun Sinan Zheng Bin Luo Zhizhen Ye Jingyun Huang 

机构地区：[1]School of Materials Science and Engineering,State Key Laboratory of Silicon and Advanced Semiconductor Materials,Zhejiang University,Hangzhou 310027,Zhejiang,China [2]Institute of Wenzhou,Zhejiang University,Wenzhou 325006,Zhejiang,China [3]Longmen Laboratory of Luoyang,Luoyang 471000,Henan,China [4]Institute of Thermal Science and Power Systems,Zhejiang University,Hangzhou 310027,Zhejiang,China

出　　处：《Journal of Energy Chemistry》2025年第2期163-174,I0005,共13页能源化学(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(52172159);the Postdoctoral Fellowship Program of CPSF(GZB20230631).

摘　　要：The reversibility and stability of aqueous Zn metal batteries(AZMBs)are largely limited by Zn dendrites and interfacial parasitic reactions.Herein,we propose a parallel modulation strategy to boost the reversibility of the Zn anode by introducing N,N,N',N'-tetramethylchloroformamidinium hexafluorophosphate(TCFH)as an additive in the electrolyte.TCFH is composed of PF6-and TN+with opposite charges.PF6-can spontaneously induce the in-situ generation of ZnF_(2)solid electrolyte interface(SEI)on the anode,which can improve the transport kinetics of Zn^(2+)at the interface,thus promoting the rapid and uniform deposition of Zn as well as inhibiting the growth of dendrites.In addition,TN+is enriched at the anode surface during Zn deposition through the anchoring effect,which brings a reconfiguration of the ion/molecule distribution.The anchored-TN+reduces the concentrations of H_(2)O and SO_(4)^(2-),sufficiently restraining the parasitic reaction.Thanks to the dual-phase interface engineering constructed of PF6-and TN+in parallel,the symmetric cell with the proposed electrolyte survives long cycling stability over750 h at 20 mA cm^(-2),10 mAh cm^(-2).This study offers a distinct viewpoint to the multidimensional optimization of Zn anodes for high-performance AZMBs.

关 键 词：Aqueous Znmetal batteries Electrolyte additive Zn anode Solid electrolyte interface Anchoring effect 

分 类 号：TM9[电气工程—电力电子与电力传动]