Issue 43, 2013
From the journal:

RSC Advances

Flower-like ZnCo2O4nanowires: toward a high-performance anode material for Li-ion batteries

Saad Gomaa Mohamed,ab   Tai-Feng Hung,a   Chih-Jung Chen,a   Chih Kai Chen,a   Shu-Fen Hu,*c   Ru-Shi Liu,*a   Kuang-Chang Wang,d   Xue-Kun Xing,d   Hsin-Mao Liu,e   Ai-Sen Liu,e   Min-Hsun Hsiehe  and  Biing-Jye Leee  

* Corresponding authors

a Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
E-mail: rsliu@ntu.edu.tw
Fax: +886-2-33668671
Tel: +886-2-33661169

b Nanoscience and Technology Program, Taiwan International Graduate Program, Institute of Physics, Academia Sinica, Taipei 115, Taiwan

c Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
E-mail: sfhu.hu@gmail.com
Tel: +886-2-77346088

d SYNergy ScienTech Corp., Science Tech-based Industrial Park, Hsinchu 300, Taiwan

e Epistar Corporation, 5, Li-hsin 5th Rd, Hsinchu Science Park, Hsinchu 300, Taiwan

Abstract

Rising interest in lightweight, thin, and flexible energy storage devices has led to numerous studies that aim to fulfill the special needs of next-generation, high-performance flexible electronics. In this study, flower-like ZnCo2O4 nanowires are fabricated by a facile hydrothermal method followed by heat treatment in air at 400 °C. The structures and morphologies of as-prepared ZnCo2O4 nanowires are characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The data indicate that the as-synthesized flower-like ZnCo2O4 nanowires are approximately 2.5 μm in length and range from 50 nm to 150 nm in diameter. The as-prepared flower-like ZnCo2O4 nanowire products are evaluated as anode materials for lithium-ion battery application. The special structural features of ZnCo2O4 nanowires, including high coating uniformity, high coating density, and porous architecture, exert a significant effect on the electrochemical performance of the nanowires. The discharge capacity of ZnCo2O4 flower-like nanowires can reach first discharge capacity at 1430 mA h g−1 to ∼900 mA h g−1 after 50 discharge–charge cycles at a current density of 200 mA g−1, indicating its potential applications for next-generation, high-performance flexible electronics. High battery performance is mainly attributed to the dense and porous nanowire structures composed of interconnected ZnCo2O4 nanoparticles, which provide good electrolyte diffusion and large electrode–electrolyte contact area while reducing volume change during the charge–discharge process. The fabricated electrode can be used to light up commercial light emitting diodes.

Graphical abstract: Flower-like ZnCo2O4 nanowires: toward a high-performance anode material for Li-ion batteries

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Article information

DOI
https://doi.org/10.1039/C3RA42625D
Article type
Paper
Submitted
29 May 2013
Accepted
16 Aug 2013
First published
19 Aug 2013

RSC Adv., 2013,3, 20143-20149

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Flower-like ZnCo2O4 nanowires: toward a high-performance anode material for Li-ion batteries

S. G. Mohamed, T. Hung, C. Chen, C. K. Chen, S. Hu, R. Liu, K. Wang, X. Xing, H. Liu, A. Liu, M. Hsieh and B. Lee, RSC Adv., 2013, 3, 20143 DOI: 10.1039/C3RA42625D

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