Momodu, Damilola Y.Bello, AbdulhakeemDangbegnon, Julien K.Barzegar, FarshadTaghizadeh, FatemehFabiane, MopeliJohnson, Alan T. CharlieManyala, Ncholu I.2014-11-142014-11-142014-09-17Momodu, D, Bello, A, Dangbegnon, J, Barzeger, F, Taghizadeh, F, Fabiane, M, Johnson, ATC & Manyala, N 2014, 'Solvothermal synthesis of NiAl double hydroxide microspheres on a nickel foam-graphene as an electrode material for pseudo-capacitors', AIP Advances, vol. 4, no. 9, pp. 097122-1-097122-14.2158-322610.1063/1.4896125http://hdl.handle.net/2263/42576In this paper, we demonstrate excellent pseudo-capacitance behavior of nickelaluminum double hydroxide microspheres (NiAl DHM) synthesized by a facile solvothermal technique using tertbutanol as a structure-directing agent on nickel foam-graphene (NF-G) current collector as compared to use of nickel foam current collector alone. The structure and surface morphology were studied by X-ray diffraction analysis, Raman spectroscopy and scanning and transmission electron microscopies respectively. NF-G current collector was fabricated by chemical vapor deposition followed by an ex situ coatingmethod of NiAlDHMactivematerial which forms a composite electrode. The pseudocapacitive performance of the composite electrode was investigated by cyclic voltammetry, constant charge–discharge and electrochemical impedance spectroscopy measurements. The composite electrode with the NF-G current collector exhibits an enhanced electrochemical performance due to the presence of the conductive graphene layer on the nickel foam and gives a specific capacitance of 1252 F g−1 at a current density of 1 A g−1 and a capacitive retention of about 97% after 1000 charge–discharge cycles. This shows that these composites are promising electrode materials for energy storage devices.en© Author(s) 2014. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.Nickelaluminum double hydroxide microspheres (NiAl DHM)Nickel foam-graphene (NF-G)Solvothermal synthesisPseudo-capacitorsSolvothermal synthesis of NiAl double hydroxide microspheres on a nickel foam-graphene as an electrode material for pseudo-capacitorsArticle