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Indexed by:期刊论文

Date of Publication:2014-05-20

Journal:ELECTROCHIMICA ACTA

Included Journals:SCIE、EI、Scopus

Volume:129

Page Number:93-99

ISSN No.:0013-4686

Key Words:Lithium-ion Battery; Fe-Sn/C Nanocomposites; Arc-discharge method; Cycleability; Anode

Abstract:In this work, Fe-Sn nanoparticles and its carbide counterpart, i.e. Fe-Sn/C nanoparticles were fabricated by DC arc-discharge method. The crystal structures, morphologies and cyclic performances of both samples were characterized by XRD, HRTEM and galvanostatic discharge/charge measurements. It is indicated that the main phases in two kinds of nanoparticles are FeSn2 and Sn. The sizes of Fe-Sn nanoparticles are in the range of 30 similar to 100 nm, while Fe-Sn/C nanoparticles are about 10 similar to 50 nm. Fe-Sn nanoparticles electrode exhibits the real discharge/charge specific capacities of 192/159 mAh g(-1), those are gradually faded to near 11 mAh g-1 after 50 cycles. Nevertheless, Fe-Sn/C nanoparticles electrode has the real discharge/charge specific capacities of 557/517 mAh g(-1), can maintain to 373 mAh g(-1) after 50 cycles. The carbon additive in Fe-Sn/C nanoparticles was characterized to be a graphite-like shell, its excellent effects on suppression of the volume change and electrochemical performances were discussed. (c) 2014 Elsevier Ltd. All rights reserved.