Ultrathin nickel oxide nanosheets for enhanced sodium and lithium storage

Outstanding sodium and lithium storage capability is successfully demonstrated in ultrathin NiO nanosheets (4-5 nm in thickness) synthesized via a facile solvothermal process followed by annealing in air. For sodium storage, the NiO nanosheets deliver a high reversible specific capacity of 299 mA h...

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Bibliographic Details
Published in:Journal of power sources 2015-01, Vol.274, p.755-761
Main Authors: Sun, Wenping, Rui, Xianhong, Zhu, Jixin, Yu, Linghui, Zhang, Yu, Xu, Zhichuan, Madhavi, Srinivasan, Yan, Qingyu
Format: Article
Language:English
Subjects:
Charge
Current density
Diffusion rate
Lithium
Lithium batteries
Nanostructure
Rechargeable batteries
Silver
Sodium
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Summary:Outstanding sodium and lithium storage capability is successfully demonstrated in ultrathin NiO nanosheets (4-5 nm in thickness) synthesized via a facile solvothermal process followed by annealing in air. For sodium storage, the NiO nanosheets deliver a high reversible specific capacity of 299 mA h g super(-1) at a current density of 1 A g super(-1), and the capacity still remains up to 154 mA h g super(-1) at 10 A g super(-1). Upon charge/discharge cycling, the specific capacity maintains to be as high as 266 mA h g super(-1) during the 100th cycle at 1 Ag super(-1). Such sodium storage capability of NiO nanosheets is by far one of the best reported for transition metal oxides. For lithium storage, the cell achieves a high reversible specific capacity of 1242 and 250 mA h g super(-1) at 0.2 and 15 A g super(-1), respectively. The capacity for lithium storage maintains to be 851 mA h g super(-1) during the 170th cycle at 2 A g super(-1). The present results demonstrate that ultrathin NiO nanosheets are highly attractive for fast sodium/lithium diffusion with high-rate capability for rechargeable sodium-ion batteries (SIBs) and lithium-ion batteries (LIBs).
ISSN:0378-7753
DOI:10.1016/j.jpowsour.2014.10.105