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Synthesis of nickel selenide thin films for high performance all-solid-state asymmetric supercapacitors
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作者 Hao Li Jiangfeng Gong +4 位作者 Jing-Chang Li Xincheng Zhang Chunmei Tang Hongbing Yao qingping ding 《Chinese Chemical Letters》 SCIE CAS CSCD 2020年第9期2275-2279,共5页
As a significant semiconductor,nickel selenide shows enormous potential and extensive application pro spects in the field of sensor,photocatalysis and supercapacito r.In this paper,nickel selenide(Ni3Se2,NiSe) thin fi... As a significant semiconductor,nickel selenide shows enormous potential and extensive application pro spects in the field of sensor,photocatalysis and supercapacito r.In this paper,nickel selenide(Ni3Se2,NiSe) thin films were successfully fabricated on stainless-steel sheet using a facile,effective electrodeposition technique.The morphologies,microstructures and chemical compositions of the thin films are characterized systematically.Electrochemical tests exhibit that the Ni3Se2 and NiSe possess high specific capacitance of 581.1 F/g and 1644.7 F/g,respectively.A flexible,all-solid-state asymmetric supercapacitor is assembled by utilizing NiSe film as positive electrode and activated carbon as negative electrode.The solid device delivers a high areal capacitance of 27.0 mF/cm2 at the current density of 0.7 mA/cm2.The maximum volumetric energy density and powerdensity of the NiSe//AC asymmetric SCs can achieve 0.26 mWh/cm3 and 33.35 mW/cm3,respectively.The device shows robust cycling stability with 84.6% capacitance retention after 10,000 cycles,outstanding flexibility and satis factory mechanical stability.Moreover,two devices in series can light up a red light-emitting diode,which displayed great potential applications for energy storage. 展开更多
关键词 Nickel selenide Electrochemical properties ASYMMETRIC ALL-SOLID-STATE SUPERCAPACITORS
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