Superior lithium-storage properties derived from a high pseudocapacitance behavior for a peony-like holey Co 3 O 4 anode
Transition metal oxides have shown extraordinary potential for lithium storage to date. Herein, a peony-like holey Co 3 O 4 architecture has been elaborately designed and successfully prepared via a solvothermal process followed by annealing treatment. The as-obtained peony-like Co 3 O 4 material sh...
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Veröffentlicht in: | Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2019-04, Vol.7 (14), p.8327-8334 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | Transition metal oxides have shown extraordinary potential for lithium storage to date. Herein, a peony-like holey Co
3
O
4
architecture has been elaborately designed and successfully prepared
via
a solvothermal process followed by annealing treatment. The as-obtained peony-like Co
3
O
4
material showed an ultra-large reversible capacity of 1880 mA h g
−1
at 500 mA g
−1
after 800 cycles when it acted as the anode. More importantly, it also afforded a remarkable high-rate capability,
i.e.
, an excellent capacity of 1141 mA h g
−1
at a current density of 10 A g
−1
. Such an impressive performance could be ascribed to improved kinetics originating from ultrathin 2D nanosheets with ample pores and a high pseudocapacitive contribution. Therefore, the peony-like Co
3
O
4
material was considered as a promising candidate for high-performance Li-ion battery anodes. |
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ISSN: | 2050-7488 2050-7496 |
DOI: | 10.1039/C9TA00294D |