期刊
MATERIALS LETTERS
卷 149, 期 -, 页码 1-4出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2015.02.092
关键词
ZnCo2O4 microspheres; Flowerlike; Binder-free; Supercapacitors
资金
- National Natural Science Foundation of China [11474135, 51202100, U1232121]
Flowerlike ZnCo2O4 microspheres were synthesized using Ni foam substrates by a facile hydrothermal method combining post-annealing treatments. The obtained microspheres are about 5 pm in diameter and composed of porous ultrathin nanosheets. And the supercapacitors based on these microspheres show a high specific capacitance (689.4 F/g at the current density of 1 A/g), good rate performance (336.6 F/g at 15 A/g), and excellent cyclic stability (97.1% capacitance retention after 1500 cycles at a high current density of 10 A/g). These remarkable electrochemical performances imply that the flowerlike ZnCo2O4 microspheres would have great potential applications in SCs. (C) 2015 Elsevier B.V. All rights reserved.
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