In this work, zinc hydroxychloride nanosheets (ZHCNs) were deposited on 3d graphene-nickel foam (NiFG) by employing a simple hydrothermal synthesis method to form NiF-G/ZHCNs composite electrode materials. The fabricated NiF-G/ZHCNs electrode revealed a well-developed pore structures with high specific surface area of 119 m(2) g(-1), and used as electrode materials for symmetric supercapacitor with aqueous alkaline electrolyte. The specific areal capacitance and electron charge transfer resistance (R-ct) were 222 mF cm(-2) (at current density of 1.0 mA cm(-2)) and 1.630 Omega, respectively, in a symmetric two electrode system. After 5000 cycles with galvanostatic charge/discharge, the device can maintain 96% of its initial capacitance under 1.0 mA cm(-2) and showed low RAC of about 9.84 Omega. These results indicate that NiF-G/ZHCNs composite is an excellent electrode material for electrochemical energy storage devices. (C) 2017 Elsevier B.V. All rights reserved.