期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 712, 期 -, 页码 233-240出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.04.103
关键词
Porous silicon flour; Bismuth nanoparticles; Nickel nanoparticles; Lithium-ion battery; Anodic compounds
资金
- National Science Foundation [95835996]
Herein, metal (nickel and bismuth) nanoparticles are supported on porous silicon flour (PSiF). Then they are proposed as high-performance anode materials for lithium ion battery. In this way, a facile procedure is introduced for the in-situ electroless assembling of nickel and bismuth nanoparticles on PSiF without using any reducing agent. The Metal@PSiF nanostructures with different Metal/Si ratio are prepared through the chemical reduction of the metals ions and oxidation of the surface of Si atoms, in a solution containing fluoride ions. The composition and morphological properties of the nanostructures are investigated using SEM, XRD, XPS and EDS. Also, galvanostatic charge-discharge and cyclic voltammetry are used to evaluate the electrochemical performance of the proposed anode materials. The synthesized Bi@PSiF nanostructure offers a specific capacity of 3245 mAh g(-1), at the 0.1 C rate while the Ni@PSiF shows a specific capacity of 2585 mAh g(-1) at the same C-rate. Both nanostructure still retains a specific capacity of about 2000 mAh g(-1) after 100 cycles, which is more than five-times larger when it compared with graphite (372 mAh g(-1)). The obtained results confirm that the new nanostructures are an excellent candidate for anode material in advanced lithium-ion batteries with enhanced capacity and excellent columbic efficiency. (C) 2017 Elsevier B.V. All rights reserved.
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