Construction of a multifunctional Ti_(3)C_(2)T_(x)MXene/g-C_(3)N_(4)artificial protective layer for dendrite-free aqueous Zn-ion batteries  

作　　者：Wei-Wei Wang Rui Huang Yu Tao Peng He Su-Xing Tuo Yu-Jian Bian Rui-Ting Hu Jun Yan Yan-Jie Liang Wen-Chao Zhang 

机构地区：[1]The Key Laboratory of Digital Flavour Research of Hunan China Tobacco Industry Co.,Ltd,Changsha 410019,China [2]College of Metallurgy and Environment,Central South University,Changsha 410083,China [3]College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China

出　　处：《Rare Metals》2024年第10期4992-5004,共13页稀有金属（英文版）

基　　金：financially supported by the Natural Science Foundation of Hunan Province(No.2020JJ4684);the National Natural Science Foundation of China(No.52104315);the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(No.52121004);the Open Project of the Key Laboratory of digital flavor research of Hunan China Tobacco Industry Co.,Ltd(No.202143000834024)。

摘　　要：The electrochemical utilization of Zn anodes in aqueous batteries is hampered by the intricate and interconnected issues of Zn dendrite growth,H_(2)evolution and Zn corrosion reactions.In this study,a multifunctional protective layer comprising MXene and graphitic carbon nitride(g-C_(3)N_(4))was constructed using a self-assembly strategy.The MXene/g-C_(3)N_(4)protective layer exhibited robust zincophilic characteristics,which facilitated a uniform distribution of the electric field and ensured a sufficient influx of Zn^(2+).This reduces the Zn^(2+)nucleation barrier and prevents dendrite growth.In addition,the hydrophobic nature of the protective layer,coupled with its negative charge,can repel SO_(4)^(2-)and select water molecules from the electrolyte,which aids in mitigating corrosion and H_(2)evolution.The symmetric Zn cell coated with the MXene/g-C_(3)N_(4)protective layer showed remarkable stability,achieving over 2000 h of reversible cycling at1 mA·cm^(-2).Furthermore,the MXene/g-C_(3)N_(4)-coated Zn anode paired with a sodium-doped V_(2)O_5cathode(NVO)exhibited enhanced cycling capability over 1500 cycles.

关 键 词：Ti_(3)C_(2)T_(x)MXene g-C_(3)N_(4) Artificial protective layers Interface stability Dendrite-free Zn anodes 

分 类 号：TB34[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]