The capacity and cycling performance of cathodes are key factors in aqueous zinc batteries(AZBs).The search for cathode materials with long cycle lives and high specific capacities is of paramount importance.In this s...The capacity and cycling performance of cathodes are key factors in aqueous zinc batteries(AZBs).The search for cathode materials with long cycle lives and high specific capacities is of paramount importance.In this study,a bimetallic telluride with a hollow polyhedral structure was synthesized using a hydrothermal method followed by vapor deposition.This composite exhibits high conductivity,facilitates rapid diffusion of electrolyte ions into the interior,and accelerates redox reactions,thereby enhancing electrochemical performance.The CoTe_(2)-NiTe_(2) electrode demonstrates an impressive specific capacity of 188.8 mAh/g at 1 A/g,highlighting its efficiency in storing a significant amount of charge per unit mass during electrochemical reactions.The assembled CoTe_(2)-NiTe_(2)//Zn battery shows favorable capacity retention(76.4%)after 10000 cycles.The energy density is remarkably high,reaching 290.3 Wh/kg,while maintaining a power density of 1.75 kW/kg.This bimetallic telluride strategy holds great promise as an alternative cathode for AZBs.展开更多
基金supported by the Joint Funds of the National Natural Science Foundation of China(No.U22A20140)the University of Jinan Disciplinary Cross-Convergence Construction Project 2023(No.XKJC-202309)+2 种基金the Jinan City School Integration Development Strategy Project(No.JNSX2023015)the Independent Cultivation Program of Innovation Team of Jinan City(No.202333042)the Youth Innovation Group Plan of Shandong Province(No.2022KJ095).
文摘The capacity and cycling performance of cathodes are key factors in aqueous zinc batteries(AZBs).The search for cathode materials with long cycle lives and high specific capacities is of paramount importance.In this study,a bimetallic telluride with a hollow polyhedral structure was synthesized using a hydrothermal method followed by vapor deposition.This composite exhibits high conductivity,facilitates rapid diffusion of electrolyte ions into the interior,and accelerates redox reactions,thereby enhancing electrochemical performance.The CoTe_(2)-NiTe_(2) electrode demonstrates an impressive specific capacity of 188.8 mAh/g at 1 A/g,highlighting its efficiency in storing a significant amount of charge per unit mass during electrochemical reactions.The assembled CoTe_(2)-NiTe_(2)//Zn battery shows favorable capacity retention(76.4%)after 10000 cycles.The energy density is remarkably high,reaching 290.3 Wh/kg,while maintaining a power density of 1.75 kW/kg.This bimetallic telluride strategy holds great promise as an alternative cathode for AZBs.
