NDLI: Nanogravel structured NiO/Ni foam as electrode for high-performance lithium-ion batteries

Content Provider	Springer Nature Link
Author	Rahman, Md. Arafat Wen, Cuie
Copyright Year	2015
Abstract	Nanogravel structured NiO/Ni electrodes were fabricated by using two-step thermal oxidation method of commercial nickel (Ni) foam in air for lithium-ion batteries (LIBs). The macro- and micro-structures of the NiO/Ni foam were characterized using X-ray diffraction (XRD), scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM-EDX), and Raman spectroscopy. Galvanostatic tests revealed that the electrode exhibits no obvious capacity fading over 40 cycles at 1 C (718 mAg$^{−1}$) and 2.5 C (1.8 Ag$^{−1}$) current rate. The discharge capacity was higher than the theoretical capacity of NiO even at a high-current rate of 2.5 C. The electrodes can deliver a reversible capacity of 1116.65 mAh g$^{−1}$ after 20th cycle at 1 C rate and 1026.20 mAh g$^{−1}$ after 40th cycle at 2.5 C rate. The cyclic voltammograms and impedance spectra analysis indicated that a redox reaction of NiO–Ni$^{0}$ with formation and decomposition of Li$_{2}$O. The excellent electrochemical performance is mainly attributed to the nanogravel structure of the NiO/Ni foam electrodes as well as its excellent electrical contact between NiO and Ni. The unique nanostructured NiO on the highly conductive metallic Ni in core resulted in the enhanced discharge capacity, coulombic efficiency, cyclic stability, and rate capability when utilized as negative electrodes in LIBs.
Starting Page	2709
Ending Page	2723
Page Count	15
File Format	PDF
ISSN	09477047
Journal	Ionics
Volume Number	21
Issue Number	10
e-ISSN	18620760
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-06-04
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Oxidation Nickel oxide Nanogravel structure Anode Capacity Lithium-ion batteries Electrochemistry Renewable and Green Energy Optical and Electronic Materials Condensed Matter Physics Energy Storage
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering Materials Science Chemical Engineering

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