Imide-pillared covalent organic framework protective films as stable zinc ion-conducting interphases for dendrite-free Zn metal anodes  

作　　者：Xiaoman Ye Xuemei Xiao Zhijing Wu Xin Wu Lin Gu Sheng Liu 

机构地区：[1]School of Chemical Engineering and Technology,Sun Yat-sen University,Zhuhai 519082,Guangdong,China [2]The Key Lab of Low-Carbon Chemistry&Energy Conservation of Guangdong Province,Sun Yat-sen University,Guangzhou 510275,Guangdong,China

出　　处：《Journal of Energy Chemistry》2024年第10期470-477,I0010,共9页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China (52373065);the Joint Fund of Ministry of Education for Equipment Pre-research (8091B032206);the Guang Dong Basic and Applied Basic Research Foundation (2021A1515111067,2023A1515010735);the start-up funding of“Hundred Talent Program”from Sun Yat-sen University。

摘　　要：The notorious growth of zinc dendrite and the water-induced corrosion of zinc metal anodes(ZMAs)restrict the practical development of aqueous zinc ion batteries(AZIBs).In this work,a zinc metallized,imide-pillared covalent organic framework(ZPC)protective film has been engineered as a stable Zn^(2+)ion-conducting interphase to modulate interfacial kinetics and suppress side reactions for ZMAs.Compared to bare Zn,ZPC@Zn exhibits a higher Zn^(2+)ionic conductivity,a larger Zn^(2+)transference number,a lower electronic conductivity,a smaller desolvation activation energy and correspondingly a significant suppression of corrosion,hydrogen evolution and Zn dendrites.Impressively,the ZPC@Zn||ZPC@Zn symmetric cell obtains a cycling lifespan over 3000 h under 5 mA cm^(-2)for 1 mA h cm^(-2).The ZPC@Zn||NH_(4)V_(4)O_(10)coin-type full battery delivers a specific capacity of 195.8 mA h g^(-1)with a retention rate of78.5%at 2 A g^(-1)after 1100 cycles,and the ZPC@Zn||NH_(4)V_(4)O_(10) pouch full cell shows a retention of70.1%in reversible capacity at 3 A g^(-1)after 1100 cycles.The present incorporation of imide-linked covalent organic frameworks in the surface modification of ZMAs will offer fresh perspectives in the search for ideal protective films for the practicality of AZIBs.

关 键 词：Aqueous zinc ion batteries Zinc metal anodes Surface modification Covalent organic frameworks Imide linkage 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.2[一般工业技术—材料科学与工程]