Journal
MATERIALS RESEARCH BULLETIN
Volume 80, Issue -, Pages 30-35Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2016.03.021
Keywords
Thin films; Nanostructures; Sputtering; Electrochemical properties; Energy storage
Categories
Funding
- National Natural Science Foundation of China [51204116]
- Zhejiang Provincial Natural Science Foundation of China [LY16E020004]
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Ni/Si core/shell nanosheet arrays are proposed to enhance the electrochemical lithium-storage properties of silicon. The arrays are characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The arrays are micro-sized in height, which are constructed by interconnected Ni nanosheet as the core and Si coating layer as the shell. The electrochemical properties as anode materials of lithium ion batteries are investigated by cyclic voltammetry (CV) and galvanostatic charge-discharge tests. The arrays can achieve high reversible capacity, good cycle stability and high rate capability. It is believed that the enhanced electrochemical performance is attributed to the electrode structure, because the interconnected Ni nanosheet can act as a three-dimensional current collector, and it has the ability of improving the electrode conductivity, enlarging the electrochemical reaction interface, and suppressing the electrode pulverization. (C) 2016 Elsevier Ltd. All rights reserved.
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