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We realized the desired spheroidizing of NiCo_2O_4 nanomaterials by laser irradiating NiCo_2O_4 suspensions with different concentrations. The results reveal that the as-prepared samples are desired spheres with the maximal average size of 568 nm and the superior dispersity, which were obtained at the energy density of 0.30 J·pulse~(-1)·cm~(-2) and NiCo_2O_4 suspension concentration of 0.2 mg·mL~(-1). However, the phase segregation, which was induced by large amounts of solid redox of Co~(3+)/Co~(2+) and Ni~(3+)/Ni~(2+), also appears in the laser-irradiation process.
We realized the desired spheroidizing of NiCo_2O_4 nanomaterials by laser irradiating NiCo_2O_4 suspensions with different concentrations. The results reveal that the as-prepared samples are the spheres with the maximal average size of 568 nm and the superior dispersity, which were obtained at the energy density of 0.30 J · pulse ~ (-1) · cm ~ (-2) and NiCo_2O_4 suspension concentration of 0.2 mg · mL ~ (-1). However, the phase segregation, which was induced by large amounts of solid redox of Co ~ ( 3 +) / Co ~ (2+) and Ni ~ (3 +) / Ni ~ (2+) also appear in the laser-irradiation process.