Hyperbranched polyamidoamine protective layer with phosphate and carboxyl groups for dendrite-free Zn metal anodes  

作　　者：Xinxiu Yan Xizhe Huang Yangyang Liu Weishang Jia Hualin Chen Qi Yao Tao Chen 

机构地区：[1]Key Laboratory of General Chemistry of the National Ethnic Afairs Commission,School of Chemistry and Environment,Southwest Minzu University,Chengdu 610041,China [2]Institute of smart city and inteligent transportation,Southwest Jiaotong University,Chengdu 611756,China [3]School of Materials Science and Engineering,Guangdong University of Petrochemical Technology,Maoming 525000,China

出　　处：《Chinese Chemical Letters》2024年第10期495-499,共5页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.22209134);the Southwest Minzu University Research Startup Funds(No.RQD2021097)。

摘　　要：Zinc metal is regarded as one of the most promising anodes for Zn-based batteries in next-generation energy storage systems.However,the dendrite growth and interfacial corrosion lead to poor reversibility and cycle life of Zn anodes.Herein,we synthesize a 2-phosphate-1,2,4-butane tricarboxylic acid modified hyperbranched polyamidoamine containing rich terminal groups of phosphate and carboxyl(HPC)as modified layer for the Zn anodes.Importantly,the in situ acid-etching promotes the exposure of(002)Zn plane and the generated salt-polymer complexes could be adhered to the Zn anodes tightly.This greatly favors the uniform deposition of Zn and inhibits interfacial corrosion.Consequently,stable HPC@Zn anode plating/stripping for over 1200 h at a high areal capacity of 4 mAh/cm^(2)and a current density of 4 m A/cm^(2)is obtained.This study provides a new avenue of hyperbranched polymer in interfacial design for highly reversible and stable Zn metal anodes.

关 键 词：Zn anode Znmetal batteries Surface chemistry Functional groups Hyperbranched polyamidoamine 

分 类 号：TM912[电气工程—电力电子与电力传动] TG174.4[金属学及工艺—金属表面处理]