In this work,a flake-structured Co2B2O5 material was obtained by a simple sol-gel method and researched for use in sodium ion batteries firstly.When serving as anode material for sodium ion batteries,it exhibits the h...In this work,a flake-structured Co2B2O5 material was obtained by a simple sol-gel method and researched for use in sodium ion batteries firstly.When serving as anode material for sodium ion batteries,it exhibits the high initial reversible capacity of 466 mAh·g-1 at a current density of 100 mA·g-1.Through the recombination of carbon nanotubes(CNTs),the composite Co2B2O5/CNTs delivers the initial reversible capacity of 464 mAh·g-1,and324 mAh·g-1 is obtained after 60 cycles under the current density of 100 mA·g-1.When under the current density of 1000 mA·g-1,a capacity of 236 mAh·g-1 is obtained for Co2B2O5/CNTs while 160 mAh·g-1 for Co2B2O5.Moreover,the sodium storage behavior of Co2B2O5 is identified by kinetic analysis.The higher Na+capacitive contribution of Co2B2O5/CNTs could account for the enhanced rate performance.The results indicate that Co2B2O5 is a promising anode material for sodium ion batteries.展开更多
基金financially supported by the National Natural Science Foundation of China(No.21673136)the Science and Technology Commission of Shanghai Municipality(No.19DZ2271100)。
文摘In this work,a flake-structured Co2B2O5 material was obtained by a simple sol-gel method and researched for use in sodium ion batteries firstly.When serving as anode material for sodium ion batteries,it exhibits the high initial reversible capacity of 466 mAh·g-1 at a current density of 100 mA·g-1.Through the recombination of carbon nanotubes(CNTs),the composite Co2B2O5/CNTs delivers the initial reversible capacity of 464 mAh·g-1,and324 mAh·g-1 is obtained after 60 cycles under the current density of 100 mA·g-1.When under the current density of 1000 mA·g-1,a capacity of 236 mAh·g-1 is obtained for Co2B2O5/CNTs while 160 mAh·g-1 for Co2B2O5.Moreover,the sodium storage behavior of Co2B2O5 is identified by kinetic analysis.The higher Na+capacitive contribution of Co2B2O5/CNTs could account for the enhanced rate performance.The results indicate that Co2B2O5 is a promising anode material for sodium ion batteries.
