title: Selective synthesis of hierarchical mesoporous spinel NiCo₂O₄ for high-performance supercapacitors.
abstract: Hierarchical mesoporous spinel NiCo₂O₄ was synthesized by a facile hydrothermal method assisted by polyvinylpyrrolidone (PVP) and a post annealing treatment. The synthesized hierarchical mesoporous NiCo₂O₄ presents a hierarchical mesoporous structure with diameters of 5.0 and 25 nm, respectively. Compared to conventional flower-like NiCo₂O₄, the hierarchical mesoporous structured NiCo₂O₄ exhibits excellent supercapacitor performance. The specific capacitance can reach 1619.1 F g(-1) at a current density of 2.0 A g(-1). When the current density is increased to 10.0 A g(-1), a specific capacitance of 571.4 F g(-1) can be obtained. Furthermore, the hierarchical mesoporous structured NiCo₂O₄ presents excellent stability. The outstanding electrochemical performance of the hierarchical mesoporous NiCo₂O₄ reveals its potential to be a promising material for use in supercapacitors, and also inspires continued research on binary metal oxides as energy transformation materials.
authors.affiliation: School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, Inner Mongolia, China.
authors.forename: Yufei
authors.initials: Y
authors.lastname: Zhang
authors.forename: Mingze
authors.initials: M
authors.lastname: Ma
authors.forename: Jun
authors.initials: J
authors.lastname: Yang
authors.forename: Haiquan
authors.initials: H
authors.lastname: Su
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.forename: Xiaochen
authors.initials: X
authors.lastname: Dong