Facile fabrication of binder-free NiO electrodes with high rate capacity for lithium-ion batteries

•The NiO nanocone arrays are fabricated by a simple hydrothermal synthesis and a subsequent thermal oxidation in air.•The binder-free NiO nanocone array electrode shows excellent rate capacity.•The cycled NiO electrode well retains its three-dimensional morphology of nanocone array. NiO nanocone arr...

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Veröffentlicht in:Applied surface science 2016-04, Vol.368, p.298-302
Hauptverfasser: Gu, Lili, Xie, Wenhe, Bai, Shuai, Liu, Boli, Xue, Song, Li, Qun, He, Deyan
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Sprache:eng
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Zusammenfassung:•The NiO nanocone arrays are fabricated by a simple hydrothermal synthesis and a subsequent thermal oxidation in air.•The binder-free NiO nanocone array electrode shows excellent rate capacity.•The cycled NiO electrode well retains its three-dimensional morphology of nanocone array. NiO nanocone arrays are fabricated on nickel foam substrate by a simple hydrothermal synthesis and a subsequent annealing in air. The obtained architecture is directly used as an anode for lithium-ion batteries without any binder. It delivers a capacity of 969mAhg−1 in the 120th cycle at a current density of 0.5C. Even at 10C, the electrode can still deliver a capacity as high as 605.9mAhg−1. The excellent electrochemical performance could be ascribed to the integrity and porosity of the cycled electrodes.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2016.01.270