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论文类型： 期刊论文

发表时间： 2016-10-01

发表刊物： JOURNAL OF SOLID STATE CHEMISTRY

收录刊物： SCIE、EI、Scopus

卷号： 242

页面范围： 127-135

ISSN号： 0022-4596

关键字： Alloy nanoparticle; Arc-discharge plasma; Thermodynamic analyses; Anode; Li-ion battery

摘要： A direct current arc-discharge method was applied to prepare the Sn-M (M=Fe, Al, Ni) bi-alloy nano-particles. Thermodynamic is introduced to analyze the energy circumstances for the formation of the nanoparticles during the physical condensation process. The electrochemical properties of as-prepared Sn-M alloy nanoparticles are systematically investigated as anodes of Li-ion batteries. Among them, Sn Fe nanoparticles electrode exhibits high Coulomb efficiency (about 71.2%) in the initial charge/discharge (257.9 mA h g(-1)/366.6 mA h g(-1)) and optimal cycle stability (a specific reversible capacity of 240 mA h g(-1) maintained after 20 cycles) compared with others. Large differences in the electrochemical behaviors indicate that the chemical composition and microstructure of the nanoparticles determine the lithium-ion storage properties and the long-term cyclic stability during the charge/discharge process. (C) 2016 Elsevier Inc. All rights reserved.