Aqueous zinc-ion batteries(AZIBs)are regarded as promising energy storage devices due to their low cost,high capacity,and ecological safety.Nevertheless,the severe dendritic growth and side reactions hinder their prac...Aqueous zinc-ion batteries(AZIBs)are regarded as promising energy storage devices due to their low cost,high capacity,and ecological safety.Nevertheless,the severe dendritic growth and side reactions hinder their practical applicability significantly.Herein,an ultrathin Cu coating layer(~200 nm)is decorated on zinc foils via filtered cathodic vacuum arc deposition technology,aiming to achieve high-performance AZIBs.The Cu layer effectively suppresses chemical corrosion and hydrogen evolution reactions and enables preferential(002)Zn deposition during the stripping/plating cycles.Consequently,the Cu@Zn anode represents an elongated cycle life over 4,000 h at 2 mA·cm^(-2)/2 mAh·cm^(-2).Even in conditions of high current density of 5 and 10 mA·cm^(-2),the Cu@Zn anode shows prolonged cycling stability exceeding 4000 and 2000 h,respectively.Such advantages also bring high Coulombic efficiency of 99.87%under 5 mAh·cm^(-2)in Cu@Ti||Zn half-cell over 1500 cycles.Moreover,the Cu@Zn||MnO_(2)full cell demonstrates a superior cyclability with a specific capacity of 203 mAh·g^(-1)after 500 cycles a1 A·g^(-1).展开更多
Rechargeable aqueous zinc(Zn)ion batteries(AZIBs)using low-cost and safe Zn metal anodes are considered promising candidates for future grid-scale energy storage systems,but the Zn dendrite problem severely hinders th...Rechargeable aqueous zinc(Zn)ion batteries(AZIBs)using low-cost and safe Zn metal anodes are considered promising candidates for future grid-scale energy storage systems,but the Zn dendrite problem severely hinders the further prospects of AZIBs.Regulating Zn depositing behaviors toward horizontal alignment is highly effective and thus has received huge attention.However,such a strategy is usually based on previous substrate engineering,which requires complex preparation or expensive equipment.Therefore,it is essential to develop a novel solution that can realize horizontally aligned Zn flake deposition via easy operation and low cost.Herein,we report an ultrathin and robust Kevlar membrane as the interlayer to mechanically suppress Zn dendrite growth.Compared to the randomly distributed flaky dendrites in the control group,the deposited Zn sheets would grow into parallel alignment with the existence of such interlayer.As the dendrites are effectively suppressed,Zn||Cu asymmetric,Zn||Zn symmetric,and Zn||MnO_(2)full batteries using Kevlar interlayer deliver significantly improved cycling stabilities.Furthermore,the Zn||MnO_(2)pouch cell using a Kevlar interlayer delivers stable cycling performance and shows stable operation during multi-angle folding.We believe this work provides a new possibility for regulating Zn deposition from a crystallographic perspective.展开更多
基金supported by the National Natural Science Foundation of China(Nos.52271117 and12027813)Hunan Provincial Natural Science Foundation of China(No.2021JJ30646)the High Technology Research and Development Program of Hunan Province of China(No.2022GK4038).
文摘Aqueous zinc-ion batteries(AZIBs)are regarded as promising energy storage devices due to their low cost,high capacity,and ecological safety.Nevertheless,the severe dendritic growth and side reactions hinder their practical applicability significantly.Herein,an ultrathin Cu coating layer(~200 nm)is decorated on zinc foils via filtered cathodic vacuum arc deposition technology,aiming to achieve high-performance AZIBs.The Cu layer effectively suppresses chemical corrosion and hydrogen evolution reactions and enables preferential(002)Zn deposition during the stripping/plating cycles.Consequently,the Cu@Zn anode represents an elongated cycle life over 4,000 h at 2 mA·cm^(-2)/2 mAh·cm^(-2).Even in conditions of high current density of 5 and 10 mA·cm^(-2),the Cu@Zn anode shows prolonged cycling stability exceeding 4000 and 2000 h,respectively.Such advantages also bring high Coulombic efficiency of 99.87%under 5 mAh·cm^(-2)in Cu@Ti||Zn half-cell over 1500 cycles.Moreover,the Cu@Zn||MnO_(2)full cell demonstrates a superior cyclability with a specific capacity of 203 mAh·g^(-1)after 500 cycles a1 A·g^(-1).
基金supported by King Abdullah University of Science and Technology(KAUST),the Project of State Key Laboratory of Organic Electronics and Information Displays,Nanjing University of Posts and Telecommunications(Nos.GZR2022010017 and GDX2022010010)the National Natural Science Foundation of China(NSFC,No.91963119 and 52102265)+4 种基金China Postdoctoral Science Foundation(No.2020M681681)Jiangsu Provincial NSF(No.BK20210604)Research Startup Fund from Nanjing University of Posts and Telecommunications(NJUPT,Nos.NY220069 and NY220085)Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD,No.YX030003)Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM).
文摘Rechargeable aqueous zinc(Zn)ion batteries(AZIBs)using low-cost and safe Zn metal anodes are considered promising candidates for future grid-scale energy storage systems,but the Zn dendrite problem severely hinders the further prospects of AZIBs.Regulating Zn depositing behaviors toward horizontal alignment is highly effective and thus has received huge attention.However,such a strategy is usually based on previous substrate engineering,which requires complex preparation or expensive equipment.Therefore,it is essential to develop a novel solution that can realize horizontally aligned Zn flake deposition via easy operation and low cost.Herein,we report an ultrathin and robust Kevlar membrane as the interlayer to mechanically suppress Zn dendrite growth.Compared to the randomly distributed flaky dendrites in the control group,the deposited Zn sheets would grow into parallel alignment with the existence of such interlayer.As the dendrites are effectively suppressed,Zn||Cu asymmetric,Zn||Zn symmetric,and Zn||MnO_(2)full batteries using Kevlar interlayer deliver significantly improved cycling stabilities.Furthermore,the Zn||MnO_(2)pouch cell using a Kevlar interlayer delivers stable cycling performance and shows stable operation during multi-angle folding.We believe this work provides a new possibility for regulating Zn deposition from a crystallographic perspective.
