Vertically Aligned Co₉S₈ Nanotube Arrays onto Graphene Papers as High‐Performance Flexible Electrodes for Supercapacitors

Publisher： John Wiley & Sons Inc

E-ISSN： 1521-3765|24|10|2339-2343

ISSN： 0947-6539

Source： CHEMISTRY - A EUROPEAN JOURNAL, Vol.24, Iss.10, 2018-02, pp. : 2339-2343

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Abstract

AbstractPaper‐like electrodes are emerging as a new category of advanced electrodes for flexible supercapacitors (SCs). Graphene, a promising two‐dimensional material with high conductivity, can be easily processed into papers. Here, we report a rational design of flexible architecture with Co₉S₈ nanotube arrays (NAs) grown onto graphene paper (GP) via a facile two‐step hydrothermal method. When employed as flexible free‐standing electrode for SCs, the proposed architectured Co₉S₈/GPs exhibits superior electrochemical performance with ultrahigh capacitance and outstanding rate capability (469 F g⁻¹ at 10 A g⁻¹). These results demonstrate that the new nanostructured Co₉S₈/GPs can be potentially applied in high performance flexible supercapacitors.