Simple preparation of ZnCo2O4 porous quasi-cubes for high performance asymmetric supercapacitors

Novel ZnCo2O4 quasi-cubes (ZnCo2O4 QCs) constructed by porous layered sheets were successfully prepared through two-step process. The precursor was initially obtained by solvothermal reaction in a combined solution of glycerin and water, and then the precursor was converted to porous ZnCo2O4 QCs after direct thermal annealing procedure in air. The ZnCo2O4 QCs were assembled by a substantial proportion of nanoparticles with an average size of 8...