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|Title:||In-situ arc discharge-derived feSn2/Onion-like carbon nanocapsules as improved stannide-based electrocatalytic anode materials for lithium-ion batteries||Authors:||Han, DD
FeSn2 stannide alloys
In-situ arc-discharge process
|Issue Date:||2019||Publisher:||Molecular Diversity Preservation International (MDPI)||Source:||Catalysts, 13 Nov. 2019, v. 9, no. 11, 950, p. 1-13 How to cite?||Journal:||Catalysts||Abstract:||Core/shell-structured FeSn2/onion-like carbon (FeSn2/OLC) nanocapsules of confined size range of sub-50 nm are synthesized via an in-situ arc-discharge process, and are evaluated in comparison with FeSn2 nanoparticles as an improved stannide-based electrocatalytic anode material for Li-ion batteries (LIBs). The in-situ arc-discharge process allows a facile one-pot procedure for forming crystalline FeSn2 stannide alloy nanoparticle cores coated by defective OLC thin shells in addition to a confined crystal growth of the FeSn2 nanoparticle cores. The LIB cells assembled using the FeSn2/OLC nanocapsules as the electrocatalytic anodes exhibit superior full specific discharge capacity of 519 mAh.g(-1) and specific discharge capacity retention of similar to 62.1% after 100 charge-discharge cycles at 50 mA.g(-1) specific current. The electrochemical stability of FeSn2/OLC nanocapsules is demonstrated from the good cycle stability of the LIBs with a high specific discharge capacity retention of 67.5% on a drastic change in specific current from 4000 to 50 mA.g(-1). A formation mechanism is proposed to describe the confined crystal growth of the FeSn2 nanoparticle cores and the formation of the FeSn2/OLC core/shell structure. The observed electrochemical performance enhancement is ascribed to the synergetic effects of the enabling of a reversible lithiation process during charge-discharge of the LIB cells by the FeSn2 nanoparticle cores as well as the protection of the FeSn2 nanoparticle cores from volume change-induced pulverization and solid electrolyte interphase-induced passivation by the OLC shells.||URI:||http://hdl.handle.net/10397/81729||EISSN:||2073-4344||DOI:||10.3390/catal9110950||Rights:||© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
The following publication Han, D.; Chatterjee, A.; Man, L.H.; Or, S.W. In-Situ Arc Discharge-Derived FeSn2/Onion-Like Carbon Nanocapsules as Improved Stannide-Based Electrocatalytic Anode Materials for Lithium-Ion Batteries. Catalysts 2019, 9, 950, 1-13 is available at https://dx.doi.org/10.3390/catal9110950
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