Enhanced lithium storage performance of hierarchical CuO nanomaterials with surface fractal characteristics

• Published in: Applied surface science Vol. 443; pp. 382 - 388
• Main Authors: Li, Ang, He, Renyue, Bian, Zhuo, Song, Huaihe, Chen, Xiaohong, Zhou, Jisheng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-06-2018
• Subjects: CuO nanomaterials; Fractal structures; Lithium-ion battery; CuO nanomaterials; Lithium-ion battery; Fractal structures
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2018.03.019

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•CuO nanostructures with fractal characteristics were prepared by a mild method.•The product shows an ultrahigh reversible capacity up to 827 mAh g−1 at 0.1 C.•The effect of surface and hierarchical structures were investigated systematically.•The fractal nature plays a key role in promoting the lithium storage performance.
Self-assembled hierarchical CuO nanostructures with fractal structures were prepared by a mild method and exhibited excellent lithium storage properties, certain of which even demonstrated a high reversible capacity of 827 mAh g−1 at a rate of 0.1 C. An interesting phenomenon was observed that the electrochemical performance varies along with the structure complexity, and the products with higher surface factal dimensions exhibited larger capability and better cyclability. Structural and electrochemical analysis methods were used to explore the lithiation kinetics of the samples and the reasons for the outstanding electrochemical performances related to the complexities of hierarchical nanostructures and the irregularities of surface and mass distribution.