Authors: Y W Sui Y M Zhang P H Hou J Q Qi F X Wei Y Z He Q K Meng Z Sun
Publish Date: 2017/03/09
Volume: 52, Issue: 12, Pages: 7100-7109
Abstract
In the report we explore a twostep efficient synthetic to purposefully fabricate threedimensional 3D NiCo2S4 nanosheets for advanced electrochemical supercapacitors They were characterized for their structural morphological and electrochemical properties by using XRD SEM TEM cyclic voltammetry and charge discharge methods The unique designed nanostructure exhibits a high specific capacitance 12571 F g−1 at current density 1 A g−1 good rate performance 757 retention for current increases around 20 times and excellent cycling stability 80 retention at 5 A g−1 after 1000 cycles We are the first step in the synthesis of 3D NiCo2S4 flowers which have a specific capacitance of 7007 F g−1 at the current density of 1 A g−1 and exhibit excellent cycling stability with 95 capacitance retention The SNiCo2S4//activated carbon asymmetric supercapacitor is can deliver a maximum energy density of 473 W h kg−1 at a power density of 4773 W kg−1 Therefore according to our investigation it can be concluded that the low cost and environmental friendly twostep approach from 3D NiCo2S4 nanoflowers to the 3D NiCo2S4 nanosheets could be used to deposit efficient 3D NiCo2S4 nanosheets for supercapacitor application
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