A cost-effective pyrrole additive for realizing highly stable Zn anode  

作　　者：Qian Wang Bo-Hui Xu Yi-Xun Du Ling-Yao Kuang Zhe-Shuai Lin Xing-Xing Gu 

机构地区：[1]Chongqing Key Laboratory of Catalysis and New Environmental Materials,College of Environment and Resources,Chongqing Technology And Business University,Chongqing,400067,China [2]Functional Crystals Lab,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing,100190,China

出　　处：《Rare Metals》2025年第1期209-217,共9页稀有金属(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.51902036);the Natural Science Foundation of Chongqing Science&Technology Commission(No.CSTB2022NSCQ-MSX0828);the Venture&Innovation Support Program for Chongqing Overseas Returnees(No.CX2021046);the Science and Technology Research Program of Chongqing Municipal Education Commission(No.KJZD-K202300802);the Research Project of Innovative Talent Training Engineering Program of Chongqing Primary and Secondary School(No.CY230801).

摘　　要：In recent years,researchers have increasingly focused on aqueous rechargeable Zn-ion batteries(AZIBs)as a cost-effective and safe alternative to lithium-ion batteries for energy storage.Nevertheless,the limited reversibility of the Zn anode and the low coulombic efficiency of the electroplating process limit the application of AZIBs.In this work,pyrrole is employed as a cost-effective electrolyte additive for stabilizing the Zn anode for the first time.By altering the coordination environment of Zn(H2O)62+,chemical and hydrogen evolution corrosion was reduced,and a molecular interface layer was in-situ constructed on the surface of the metal Zn anode,thus effectively inhibiting the corrosion of Zn anode and the growth of dendrites.In addition,the molecular interface layer based on pyrrole can effectively regulate the uniform deposition of Zn ions and limit the 2D diffusion of Zn ions.Therefore,the electrochemical performance of the metal Zn anode is greatly improved in the pyrrole-based electrolyte.At the current density of 1 mA·cm^(-2),the stable cycle can exceed 1200 h,and the average Coulomb efficiency is as high as 99%.Moreover,the full battery can have more than 400 stable cycles with a reversible capacity 247.9 mAh·g^(-1)at a current density 0.5 A·g^(-1)when assembled with V2O5 cathodes.This work provides a simple and feasible strategy for realizing the high performance of aqueous Zn-ion batteries.

关 键 词：Nitrogen-containing heterocyclic molecule Electrolyte additive Zinc-ion battery 

分 类 号：TM9[电气工程—电力电子与电力传动]