The rational design of positive electrodes for hybrid supercapacitors is profound for applications in energy storage and conversion.Herein,we designed porous-hollow Co_(9)S_(8)/NiCo-Mo one-dimensional(1D)hetero-nanost...The rational design of positive electrodes for hybrid supercapacitors is profound for applications in energy storage and conversion.Herein,we designed porous-hollow Co_(9)S_(8)/NiCo-Mo one-dimensional(1D)hetero-nanostructures on carbon cloth as battery-type electrodes.In particular,Ni–Co double hydroxide and Mo oxide grow on the surface of hollow Co_(9)S_(8)nanowires,providing rich active sites.Meanwhile,the hollow structure of the Co_(9)S_(8)nanowires is beneficial for electrolyte penetration and slows down the volume change caused by the continuous charge and discharge process.Moreover,the Co_(9)S_(8)/NiCo-Mo oxide/hydroxide electrode exhibits a remarkable areal capacity of 3.07 mA h cm^(−2)(1 mA cm^(−2)),and a hybrid supercapacitor based on Co_(9)S_(8)/NiCo-Mo nanostructures and activated carbon(AC)can output a high specific energy of 37.6 W h kg^(−1)at a specific power of 228.7 W kg^(−1)with decent cycling stability(capacity retention of 87.7%after 10000 cycles).Two connected HSCs can light up a red-light emitting diode(LED)and make the motor turn for more than 5 min.The results indicate that the unique integrated Co_(9)S_(8)/NiCo-Mo nanostructure shows great potential as a novel battery-type electrode for supercapacitors.展开更多
基金supported by the National Natural Science Foundation of China(21401073)Science&Technology Nova Program of Jilin Province(20200301051RQ)+2 种基金the Natural Science Foundation of Jilin Province of China(20170101211JC)Youth Foundation of Jilin Science and Technology(20190104194)Science Foundation of Jilin Institute of chemical Technology(2018019).
文摘The rational design of positive electrodes for hybrid supercapacitors is profound for applications in energy storage and conversion.Herein,we designed porous-hollow Co_(9)S_(8)/NiCo-Mo one-dimensional(1D)hetero-nanostructures on carbon cloth as battery-type electrodes.In particular,Ni–Co double hydroxide and Mo oxide grow on the surface of hollow Co_(9)S_(8)nanowires,providing rich active sites.Meanwhile,the hollow structure of the Co_(9)S_(8)nanowires is beneficial for electrolyte penetration and slows down the volume change caused by the continuous charge and discharge process.Moreover,the Co_(9)S_(8)/NiCo-Mo oxide/hydroxide electrode exhibits a remarkable areal capacity of 3.07 mA h cm^(−2)(1 mA cm^(−2)),and a hybrid supercapacitor based on Co_(9)S_(8)/NiCo-Mo nanostructures and activated carbon(AC)can output a high specific energy of 37.6 W h kg^(−1)at a specific power of 228.7 W kg^(−1)with decent cycling stability(capacity retention of 87.7%after 10000 cycles).Two connected HSCs can light up a red-light emitting diode(LED)and make the motor turn for more than 5 min.The results indicate that the unique integrated Co_(9)S_(8)/NiCo-Mo nanostructure shows great potential as a novel battery-type electrode for supercapacitors.
