Silicon-Core–Carbon-Shell Nanoparticles for Lithium-Ion Batteries: Rational Comparison between Amorphous and Graphitic Carbon Coatings

We aim to address this lack of knowledge through the development of a modified chemical vapor deposition approach that enables precise control of the degree of graphitization of the carbon coating

Giorgio Nava; Joseph Schwan; Matthew G. Boebinger; Matthew T. McDowell; Lorenzo Mangolini

2019

Scholarcy highlights

  • The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online
  • Silicon-core–carbon-shell nanoparticles have been widely studied as promising candidates for the replacement of graphite in commercial lithium-ion batteries
  • We aim to address this lack of knowledge through the development of a modified chemical vapor deposition approach that enables precise control of the degree of graphitization of the carbon coating
  • We provide a comparison between core–shell structures maintaining identical silicon cores with different types of carbon shells, that is, graphitic carbon and amorphous carbon
  • Replacement of 10% by weight of graphite in the electrode composition results in an increase of 60% in the storage capacity with a first cycle Coulombic efficiency of 91% and capacity retention over 100 cycles of 86%
  • We demonstrate that the graphitic-carbon-coated particles display excellent electrochemical performance even when used as a simple “drop-in” additive in graphite-dominant anodes for current generation Li-ion batteries
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