Restraining growth of Zn dendrites by poly dimethyl diallyl ammonium cations in aqueous electrolytes  

作　　者：Xiang-Xin Zhang Yuan-Qiang Chen Chang-Xin Lin Yuan-Sheng Lin Guo-Lin Hu Yong-Chuan Liu Xi-Lai Xue Su-Jing Chen Zhan-Lin Yang Bai-Sheng Sa Yi-Ning Zhang 

机构地区：[1]Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [2]Helmholtz Institute Ulm(HIU),89081 Ulm,Germany [3]Karlsruhe Institute of Technology(KIT),76021 Karlsruhe,Germany [4]College of Materials Science and Engineering,Fuzhou University,Fuzhou350108,China

出　　处：《Rare Metals》2024年第8期3735-3747,共13页稀有金属（英文版）

基　　金：financially supported by Fuzhou science and technology project (Nos.2021-ZD-213 and 2020-Z-6);Fujian Provincial Department of Science and Technology(Nos.2021T3036,2020T3004,2020T3030 and 2020H0040);STS Science And Technology Project of the Chinese Academy of Sciences(No.KFJ-STS-QYZD-2021-09-001);Quanzhou Science and Technology Project (No.2020G17);the Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy (No.2021009)。

摘　　要：Metallic zinc is an excellent anode material for Zn-ion batteries,but the growth of Zn dendrite severely hinders its practical application.Herein,an efficient and economical cationic additive,poly dimethyl diallyl ammonium(PDDA) was reported,used in aqueous Zn-ion batteries electrolyte for stabilizing Zn anode.The growth of zinc dendrites can be significantly restrained by benefiting from the pronounced electrostatic shielding effect from PDDA on the Zn metal surface.Moreover,the PDDA is preferentially absorbed on Zn(002) plane,thus preventing unwanted side reactions on Zn anode.Owing to the introduction of a certain amount of PDDA additive into the common ZnSO_(4)-based electrolyte,the cycle life of assembled Zn‖Zn cells(1 mA·cm^(-2) and 1 mAh·cm^(-2)) is prolonged to more than 1100 h.In response to the perforation issue of Zn electrodes caused by PDDA additives,the problem can be solved by combining foamy copper with zinc foil.For real application,Zn-ion hybrid supercapacitors and MnO_(2)‖Zn cells were assembled,which exhibited excellent cycling stability with PDDA additives.This work provides a new solution and perspective to cope with the dendrite growth problem of Zn anode.

关 键 词：PDDA Electrostatic shielding effect Zn anode Zn dendrites 

分 类 号：TM912[电气工程—电力电子与电力传动] O646[理学—物理化学]