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Cu₂O Nanoparticles and Multi-Branched Nanowires as Anodes for Lithium-Ion Batteries

Xu Chen

Department of Physics and Astronomy, Yunnan University, Kunming, Yunnan Province 650091, P. R. China

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Chunxin Yu

Department of Physics and Astronomy, Yunnan University, Kunming, Yunnan Province 650091, P. R. China

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Xiaojiao Guo

Department of Physics and Astronomy, Yunnan University, Kunming, Yunnan Province 650091, P. R. China

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Qinsong Bi

Department of Physics and Astronomy, Yunnan University, Kunming, Yunnan Province 650091, P. R. China

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Muhammad Sajjad

Department of Physics and Astronomy, Yunnan University, Kunming, Yunnan Province 650091, P. R. China

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Yang Ren

Department of Physics and Astronomy, Yunnan University, Kunming, Yunnan Province 650091, P. R. China

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Xiaowei Zhou

Department of Physics and Astronomy, Yunnan University, Kunming, Yunnan Province 650091, P. R. China

E-mail Address: zhouxiaowei@ynu.edu.cn

Corresponding authors.

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, and

Zhu Liu

http://orcid.org/0000-0002-1266-6059

Department of Physics and Astronomy, Yunnan University, Kunming, Yunnan Province 650091, P. R. China

Micro and Nano-materials and Technology, Key Laboratory of Yunnan Province, Kunming City, Yunnan 650091, P. R. China

E-mail Address: zhuliu@ynu.edu.cn

Corresponding authors.

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https://doi.org/10.1142/S1793292018501035Cited by:8 (Source: Crossref)

Abstract

Novelty Cu₂O multi-branched nanowires and nanoparticles with size ranging from $\sim$ $\sim$ 15nm to $\sim$ $\sim$ 60nm have been synthesized by one-step hydrothermal process. These Cu₂O nanostructures when used as anode materials for lithium-ion batteries exhibit the excellent electrochemical cycling stability and reduced polarization during the repeated charge/discharge process. The specific capacity of the Cu₂O nanoparticles, multi-branched nanowires and microscale are maintained at 201.2mAh/g, 259.6mAh/g and 127.4mAh/g, respectively, under the current density of 0.1A/g after 50 cycles. The enhanced electrochemical performance of the Cu₂O nanostructures compared with microscale counterpart can be attributed to the larger contact area between active Cu₂O nanostructures/electrolyte interface, shorter diffusion length of Li $^{+}$ $^{+}$ within nanostructures and the improved stress release upon lithiation/delithiation.

Keywords:

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