Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 768, Issue -, Pages 938-943Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.07.322
Keywords
Lithium ion batteries; VS4; Carbonate ester electrolytes; Fe@C nanoparticles; Polysulfides
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Funding
- National Key R&D Program of China [2016YFB0100302]
- Natural Science Foundation of China [51002054, 60306011]
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Fe@C-VS4/RGO composite is synthesized via ball-milling the mixture of VS4/RGO and Fe@C nanoparticles, and exhibits better electrochemical stability than the pristine VS4/RGO. Through the CV, galvanostatic tests in different potential range, and DFT calculation, it is found that metal nanoparticles play positive effects on the redox reactions of VS4, which can restrain the irreversible reactions between polysulfides and ester based electrolytes, and catalyze the conversion of Li2S into S. our results provide a new strategy to improve the electrochemical stability of sulfur/sulfides electrodes in carbonate ester electrolytes via the incorporation of metal nanoparticles. (C) 2018 Elsevier B.V. All rights reserved.
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