Enhanced cycling stability of NiCo₂S₄@NiO core-shell nanowire arrays for all-solid-state asymmetric supercapacitors.

ABSTRACT: As a new class of pseudocapacitive material, metal sulfides possess high electrochemical performance. However, their cycling performance as conventional electrodes is rather poor for practical applications. In this article, we report an original composite electrode based on NiCo₂S₄@NiO core-shell nanowire arrays (NWAs) with enhanced cycling stability. This three-dimensional electrode also has a high specific capacitance of 12.2 F cm^-2 at the current density of 1 mA cm^-2 and excellent cycling stability (about 89% retention after 10,000 cycles). Moreover, an all-solid-state asymmetric supercapacitor (ASC) device has been assembled with NiCo₂S₄@NiO NWAs as the positive electrode and active carbon (AC) as the negative electrode,

SUBMITTER: Huang Y 

PROVIDER: S-EPMC5141571 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature