[CH3NH3][M(HCOO)3]-based 2D porous NiCo2S4 nanosheets for high-performance supercapacitors with high power densities

Cost-effective and high-performance electrode materials for energy storage conversion are essential commercial applications. In this work, the influence of solvent on morphologies [CH3NH3][M(HCOO)3] precursors was studied to design synthesize two-dimensional (2D) porous NiCo2S4 nanosheets with different structures. As an material supercapacitors, Microflower-NiCo2S4 exhibits excellent capacitance (1,141 F g?1 at 1 A g?1) stability (88.2% initial maintained after 5,000 cycles 5 g?1). Moreover, asymmetric capacitor constructed using carbon (PC) demonstrated density 51.25 Wh kg?1 a power 397.5 W kg?1. When two Microflower-NiCo2S4//PC supercapacitors were assembled in series, device supplied alarm clock dimensions 6.1 × cm2 more than 32 min. Therefore, preparation metal sulfides oxides hollow structures [CH3NH3][M(HCOO)3]-template has potential applications conversion.