Rechargeable aqueous zinc-ion batteries(AZIBs)exhibit appreciable potential in the domain of electrochemical energy storage.However,there are serious challenges for AZIBs,for instance zinc dendrite growth,hydrogen evo...Rechargeable aqueous zinc-ion batteries(AZIBs)exhibit appreciable potential in the domain of electrochemical energy storage.However,there are serious challenges for AZIBs,for instance zinc dendrite growth,hydrogen evolution reaction(HER),and corrosion side reactions.Herein,we propose a surface engineering modification strategy for coating the montmorillonite(MMT)layer onto the surface of the Zn anode to tackle these issues,thereby achieving high cycling stability for rechargeable AZIBs.The results reveal that the MMT layer on the surface of the Zn anode is able to provide ordered zincophilic channels for zinc ions migration,facilitating the reaction kinetics of zinc ions.Density functional theory(DFT)calculations and water contact angle(CA)tests prove that MMT@Zn anode exhibits superior adsorption capacity for Zn^(2+)and better hydrophobicity than the bare Zn anode,thereby achieving excellent cycling stability.Moreover,the MMT@Zn||MMT@Zn symmetric cell holds the stable cycling over 5600 h at 0.5 mA cm^(-2)and 0.125 m A h cm^(-2),even exceeding 1800 h long cycling under harsh conditions of 5 m A cm^(-2)and 1.25 m A h cm^(-2).The MMT@Zn||V_(2)O_(5)full cell reaches over 3000 cycles at 2 A g^(-1)with excellent rate capability.Therefore,this surface engineering modification strategy for enhancing the electrochemical performance of AZIBs represents a promising application.展开更多
Rechargeable aqueous zinc ion batteries(AZIBs)have attracted considerable attention.However,issues such as zinc dendrite growth and harmful parasitic reactions adversely affect their cycling stability.This work propos...Rechargeable aqueous zinc ion batteries(AZIBs)have attracted considerable attention.However,issues such as zinc dendrite growth and harmful parasitic reactions adversely affect their cycling stability.This work proposes a novel and simple strategy to coat organic montmorillonite(MDS),where the interlayers are expanded through didodecyldimethylammonium bromide,on the zinc surface to achieve excellent cycling stability.The mechanisms for suppressing zinc dendrite growth and hindering harmful reactions are elucidated.The results revealthat the MDS coating on the zinc anode surface provides a pathway for Zn^(2+)transport,facilitating the regulation of the(002)crystal plane and isolating the electrolyte from direct contact with the zinc plate.Density functional theory calculations indicate that the MDS possesses higher adsorption energy for Zn^(2+),H_(2)O,and SO_(4)^(2−),thereby suppressing the harmful parasitic reactions.The MDS@Zn symmetric cell demonstrates an excellent cycle life of over 3620 h(1 mAh cm^(−2),2 mA cm^(−2)).The MDS@Zn||Cu cell achieves an impressive coulombic efficiency of 99.5%over 3,600 h(1 mA cm^(−2),1 mAh cm^(−2)).Further,the MDS@Zn||VO_(2)full cell retained 95.5%capacity(200 mAh g^(−1))after 1300 cycles at 2.5 A g^(−1).This work offers new insights into surface engineering strategies to achieve high-performance AZIBs.展开更多
基金National Natural Science Foundation of China(Grant No.22005318,22379152)Western Young Scholars Foundations of Chinese Academy of Sciences+4 种基金Lanzhou Youth Science and Technology Talent Innovation Project(Grant No.2023-NQ-86,No.2023-QN-96)Lanzhou Chengguan District Science and Technology Plan Project(Grant No.2023-rc-4,2022-rc-4)Collaborative Innovation Alliance Fund for Young Science and Technology Worker(Grant No.HZJJ23-7)National Nature Science Foundations of Gansu Province(Grant No.21JR11RA020)Fundamental Research Funds for the Central Universities(Grant No.31920220073,31920230128)。
文摘Rechargeable aqueous zinc-ion batteries(AZIBs)exhibit appreciable potential in the domain of electrochemical energy storage.However,there are serious challenges for AZIBs,for instance zinc dendrite growth,hydrogen evolution reaction(HER),and corrosion side reactions.Herein,we propose a surface engineering modification strategy for coating the montmorillonite(MMT)layer onto the surface of the Zn anode to tackle these issues,thereby achieving high cycling stability for rechargeable AZIBs.The results reveal that the MMT layer on the surface of the Zn anode is able to provide ordered zincophilic channels for zinc ions migration,facilitating the reaction kinetics of zinc ions.Density functional theory(DFT)calculations and water contact angle(CA)tests prove that MMT@Zn anode exhibits superior adsorption capacity for Zn^(2+)and better hydrophobicity than the bare Zn anode,thereby achieving excellent cycling stability.Moreover,the MMT@Zn||MMT@Zn symmetric cell holds the stable cycling over 5600 h at 0.5 mA cm^(-2)and 0.125 m A h cm^(-2),even exceeding 1800 h long cycling under harsh conditions of 5 m A cm^(-2)and 1.25 m A h cm^(-2).The MMT@Zn||V_(2)O_(5)full cell reaches over 3000 cycles at 2 A g^(-1)with excellent rate capability.Therefore,this surface engineering modification strategy for enhancing the electrochemical performance of AZIBs represents a promising application.
基金supported by the National Natural Science Foundation of China(grant nos.22379152,22005318,and 44469020)the Science and Technology Plan Foundations of Gansu Province(grant no.25JRRA470)+2 种基金the Western Young Scholars Foundations of the Chinese Academy of Sciences,the Lanzhou Chengguan District Science and Technology Plan Project(grant nos.2023-rc-4 and 2024RCCX0002)the Gansu Provincial Key R&D Program Project(grant no.24YFGA010)the Lanzhou Youth Science and Technology Talent Innovation Project(grant no.2024-QN-1).
文摘Rechargeable aqueous zinc ion batteries(AZIBs)have attracted considerable attention.However,issues such as zinc dendrite growth and harmful parasitic reactions adversely affect their cycling stability.This work proposes a novel and simple strategy to coat organic montmorillonite(MDS),where the interlayers are expanded through didodecyldimethylammonium bromide,on the zinc surface to achieve excellent cycling stability.The mechanisms for suppressing zinc dendrite growth and hindering harmful reactions are elucidated.The results revealthat the MDS coating on the zinc anode surface provides a pathway for Zn^(2+)transport,facilitating the regulation of the(002)crystal plane and isolating the electrolyte from direct contact with the zinc plate.Density functional theory calculations indicate that the MDS possesses higher adsorption energy for Zn^(2+),H_(2)O,and SO_(4)^(2−),thereby suppressing the harmful parasitic reactions.The MDS@Zn symmetric cell demonstrates an excellent cycle life of over 3620 h(1 mAh cm^(−2),2 mA cm^(−2)).The MDS@Zn||Cu cell achieves an impressive coulombic efficiency of 99.5%over 3,600 h(1 mA cm^(−2),1 mAh cm^(−2)).Further,the MDS@Zn||VO_(2)full cell retained 95.5%capacity(200 mAh g^(−1))after 1300 cycles at 2.5 A g^(−1).This work offers new insights into surface engineering strategies to achieve high-performance AZIBs.
