Facile fabrication of reduced graphene oxide covered ZnCo2O4 porous nanowire array hierarchical structure on Ni-foam as a high performance anode for a lithium-ion battery

Content Provider	Semantic Scholar
Author	Wang, Yujue Zhang, Yongzhi Ou, Junke Zhao, Qian Liao, Mei Yi Xiao, Dan
Copyright Year	2016
Abstract	We successfully prepared a nanostructure from ZnCo2O4 nanowire arrays directly grown on a Ni-foam substrate, with a surface decorated with reduced graphene oxide (rGO), through a very simple and cost-effective two-step facile fabrication using a hydrothermal method together with calcination treatment, followed by electro-deposition. It is shown that there are plenty of pores distributed along each of the nanowires, providing a large specific surface area. We also observe that the rGO thin flakes have indeed covered the ZnCo2O4 nanowires. This binder-free hierarchical composite on a Ni substrate was further used as an anode for lithium ion batteries. It displays a largely improved electrochemical performance, with a high capacity, excellent cycling stability and good rate capability, compared to both the anode without rGO covering and the anode with binder and conductive additive. It can retain a high discharge capacity of 1208 mA h g−1 after 100 cycles at the rate of 0.1 A g−1, and in the mean time, it can also provide a high capacity of 1032 mA h g−1 after 100 cycles even at a high rate of 0.5 A g−1. In this paper we prove that our rGO covered ZnCo2O4 nanowire array hierarchical structure supported on a Ni-foam substrate is a promising anode material for high performance lithium storage devices.
Starting Page	547
Ending Page	554
Page Count	8
File Format	PDF HTM / HTML
DOI	10.1039/C5RA21916G
Volume Number	6
Alternate Webpage(s)	http://www.rsc.org/suppdata/c5/ra/c5ra21916g/c5ra21916g1.pdf
Alternate Webpage(s)	https://pubs.rsc.org/en/content/getauthorversionpdf/C5RA21916G
Alternate Webpage(s)	https://doi.org/10.1039/C5RA21916G
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article