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Erschienen in:
07.08.2017
Hierarchical flower-like nickel hydroxide with superior lithium storage performance
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 22/2017
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Abstract
Hierarchical flower-like α-Ni(OH)2 was prepared by homogeneous precipitation method with the assistance of sodium dodecyl sulfate. When used as anode material for lithium-ion batteries, this flower-like α-Ni(OH)2 exhibits a high specific capacity, much enhanced cycling stability, and superior rate capability. For example, this flower-like α-Ni(OH)2 delivered a high capacity of 2031 mAh/g at the current density of 1 A/g for the initial cycle, and still maintained 892 mAh/g after 50th cycle with the capacity retention rate of 88.61% compared to the 10th cycle. Even at the ultrahigh current density of 5 A/g, this flower-like α-Ni(OH)2 can still delivers a capacity of 620 mAh/g. More importantly, pseduocapacitive behavior contributed a great portion of the total stored charge of this flower-like α-Ni(OH)2.