Devising electrode materials with novel configurations and unique properties is a feasible strategy to boost the electrochemical properties of hybrid supercapacitors.This research demonstrates an effective two-step st...Devising electrode materials with novel configurations and unique properties is a feasible strategy to boost the electrochemical properties of hybrid supercapacitors.This research demonstrates an effective two-step strategy to construct N,S co-doped porous carbon(NSC)sphere supported CoS nanoparticles with phosphate functionalization(P-NSC/CoS).Benefiting from the active multi-components,the electrochemical features of CoS can be remarkably modulated after the NSC and phosphate modifications.As the cathode material for the supercapacitor,the acquired P-NSC/CoS composite delivers a splendid capacity of 436.5 C g^(-1)at 1 A g^(-1)and a superb cycling property of 91.5%after 10000 cycles at 10 A g^(-1)in 6 M KOH.Furthermore,the Fe_(2)O_(3)nanocrystals with ultrafine size are in situ deposited on NSC via a solvothermal-calcination process.The NSC/Fe_(2)O_(3)composite presents a sizeable capacitance of 433 F g^(-1)at 1 A g^(-1)with 100.6%capacitance retention after 10000 cycles.More significantly,it is inspiring that the assembled P-NSC/CoS//NSC/Fe_(2)O_(3)hybrid supercapacitor delivers an energy density of up to 64.3 W h kg^(-1)at 873.6 W kg^(-1)and a splendid cycling stability of 94.2%after 10000 cycles at 5 A g^(-1)in 6 M KOH.The appreciable data demonstrate that the prepared advanced electrode materials and the hybrid supercapacitor display excellent application prospects in energy storage.展开更多
基金supported by the National Natural Science Foundation of China(21875091)the Natural Science Foundation for Jiangsu Colleges and Universities(21KJB480005).
文摘Devising electrode materials with novel configurations and unique properties is a feasible strategy to boost the electrochemical properties of hybrid supercapacitors.This research demonstrates an effective two-step strategy to construct N,S co-doped porous carbon(NSC)sphere supported CoS nanoparticles with phosphate functionalization(P-NSC/CoS).Benefiting from the active multi-components,the electrochemical features of CoS can be remarkably modulated after the NSC and phosphate modifications.As the cathode material for the supercapacitor,the acquired P-NSC/CoS composite delivers a splendid capacity of 436.5 C g^(-1)at 1 A g^(-1)and a superb cycling property of 91.5%after 10000 cycles at 10 A g^(-1)in 6 M KOH.Furthermore,the Fe_(2)O_(3)nanocrystals with ultrafine size are in situ deposited on NSC via a solvothermal-calcination process.The NSC/Fe_(2)O_(3)composite presents a sizeable capacitance of 433 F g^(-1)at 1 A g^(-1)with 100.6%capacitance retention after 10000 cycles.More significantly,it is inspiring that the assembled P-NSC/CoS//NSC/Fe_(2)O_(3)hybrid supercapacitor delivers an energy density of up to 64.3 W h kg^(-1)at 873.6 W kg^(-1)and a splendid cycling stability of 94.2%after 10000 cycles at 5 A g^(-1)in 6 M KOH.The appreciable data demonstrate that the prepared advanced electrode materials and the hybrid supercapacitor display excellent application prospects in energy storage.
