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The Ni3S2/Ni(OH)2 electrode could deliver a high areal capacity of 1.58 C/cm2 at 2 mA/cm2, along with outstanding cycling stability (113% capacity retention after 30,000 cycles). The energy density of the Ni3S2/Ni(OH)2//AC hybrid device was 30.23 Wh/kg at a power density of 155 W/kg (15.5 Wh/kg at 3,875 W/kg). Compared with other Ni(OH)2 composites on Ni foam, these results indicate that Ni3S2/Ni(OH)2 directly grown on Ni foam opens up the potential application for energystorage devices with high areal capacity and high cycling performance.