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 ...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.展开更多
基金financially supported by the Natural Science Foundation of Hunan Province(No.2020JJ4684)the National Natural Science Foundation of China(No.52104315)+1 种基金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)。
文摘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.
