▎ 摘　　要

S-doped graphene oxide hybrid nanosheets are prepared by a facile in situ-polymerization method. The electrochemical performance is evaluated using cyclic voltammetry, galvanostatic charge/discharge techniques and impedance spectroscopy in 2 M KOH. As an electroactive material, it exhibits good capacitive performance in alkali aqueous electrolyte, high specific capacitance (up to 296 F g(-1)) at a current density of 0.3 A g(-1), which is calculated via charge/discharge curve in three electrode systems. The electrical conductivity is also measured. More importantly, over 91.86% of the long-term stability is retained after repeating the galvanostatic charge/discharge over 4000 cycles. Furthermore, larger energy density (up to 148 W h kg(-1) at a power density of 41.6 W kg(-1)) of the GO-TB-based three-electrode device is obtained with alkali aqueous electrolytes. (C) 2015 Elsevier B.V. All rights reserved.