【摘 要】
：
To construct supercapacitors(SCs)with high-efficient electrochemical properties,the morphology and structure of applied electrode materials are the key factors.Herein,three-dimensional(3D)sea urchin-like MnCo2O4 nanoarchitectures grown on Ni foam(NF)were
【机 构】
：
School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,
论文部分内容阅读
To construct supercapacitors(SCs)with high-efficient electrochemical properties,the morphology and structure of applied electrode materials are the key factors.Herein,three-dimensional(3D)sea urchin-like MnCo2O4 nanoarchitectures grown on Ni foam(NF)were successfully synthesized via a simple solvothermal method and subsequent annealing treatment.Electrochemical tests revealed that the area specific capacitances of the MnCo2O4 electrode and the corresponding assembled asymmetric device can achieve 1634 and 522 mF·cm-2,respectively.When the power density of the assembled asymmetric supercapacitor(ASC)is 2.25 mW·cm-2,the maximum energy density can reach 0.163 mW·h·cm-2.After 5500 cycles of long-term stability test,the capacity retention rate maintains 91.7％.The excellent electrochemical performance can be mainly ascribed to the unique nanostructure of the material,which provides a great quantity of electroactive sites for Faraday redox reactions as well as accelerates the process of the ions/electrons transport.This work provides a certain reference value for the preparation of MnCo2O4 electrode with novel structure and excellent electrochemical performance for SCs.
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