Abstract
To address the low conductivity and easy agglomeration of transition metal sulfide nanoparticles,FeCoS4 nanoparticles embedded in S-doped hollow carbon(FeCoS4@S-HC)composites were successfully fabri-cated through a combination of hydrothermal processes and sulfidation treatment.The unique bowl-shaped FeCoS4/S-HC composites exhibit excellent structural stability with a high specific surface area of 303.7 m2·g-1 and a pore volume of 0.93 cm3·g-1.When applied as anode material for lithium-ion batteries,the FeCoS4@S-HC anode exhibits efficient lithium storage with high reversible specific ca-pacity(970.2 mA·h·g-1 at 100 mA·g-1)and enhanced cycling stability(574 mA·h·g-1 at 0.2 A·g-1 after 350 cycles,a capacity retention of 84％).The excellent lithium storage is attributed to the fact that the bimetallic FeCoS4 nanoparticles with abundant active sites can accelerate the electrochemical reaction kinetics,and the bowl-shaped S-HC structure can provide a stable mechanical structure to suppress volume expansion.
基金项目
国家自然科学基金(22379056)
国家自然科学基金(52102260)
中国博士后科学基金(2022M711545)
Carbon Peak and Carbon Neutrality Project(Breakthrough for Industry Prospect and Key Technologies)of Zhenjiang City(CG2023003)
万方数据