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Abstract:
Three-dimensional porous Cu/Cu2O, CuO, CuO/NiO were prepared on Ni foam by a simple two step method which consist of a replacement reaction and subsequent thermal treatment method at various temperature. The morphology and microstructure of the samples were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electrochemical properties of the samples were evaluated by galvanostatic discharge-charge cycling, cyclic voltammetry and impedance spectral measurements on cells with lithium discs as counter electrode and reference electrode. Compared to Cu/Cu2O and CuO/NiO, the sample of CuO obtained at 400 degrees C exhibited the best electrochemical performance which delivered a reversible capacity of 605.3 mAh g(-1) (89.8% of the theoretical capacity) after 50 cycles at the current density of 100 mA g(-1), without noticeable capacity fading. The excellent electrochemical performance of porous CuO can be attributed to the three-dimensional porous structure, which cannot only provide large surface area but also facilitate Li+ and electron transfer, and the strong connection between active materials and Ni foam can promote better intrinsic kinetics. (c) 2013 Elsevier Ltd. All rights reserved.
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ELECTROCHIMICA ACTA
ISSN: 0013-4686
Year: 2013
Volume: 105
Page: 282-288
6 . 6 0 0
JCR@2022
ESI Discipline: CHEMISTRY;
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 18
SCOPUS Cited Count: 18
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 6
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