Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6606182 | Electrochimica Acta | 2016 | 10 Pages |
Abstract
A facile sacrificial-template method combined with a post annealing treatment was developed to synthesize uniform hollow polyhedral (cubic, octahedral and dodecahedral) NiO materials. The electrochemical and lithium-ion battery performances of the shape controlled hollow polyhedral NiO materials were examined, providing us with a description of the structure-performance correlations of hollow polyhedral anodes. The lithium-ion battery performance was found to be highly dependent on the hollow polyhedral NiO morphology. The hollow dodecahedral NiO (HD-NiO) electrode exhibited excellent cycling stability, high reversible capacity and good rate capacity compared to the other two NiO samples. At a current density of 0.1 A gâ1, the hollow dodecahedral NiO electrode displayed an especially high capacity of 980 mAh gâ1 after 100 cycles, which was much higher than that of the hollow cubic and octahedral NiO electrodes. Most important of all, when assembled with LiCoO2 to construct a full lithium-ion battery (HD-NiO//LiCoO2), the HD-NiO electrode exhibited a reversible capacity of 627 mAh gâ1 at a current density of 0.1 A gâ1 in the potential range of 1.0-3.8 V. These results clearly demonstrate that hollow polyhedral NiO has potential as an anode material in next generation lithium-ion battery systems with improved storage capacities.
Keywords
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Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Feini Lin, Hui Wang, Gang Wang,