Designing of high capacity Si nanosheets anode electrodes for lithium batteries

Sang Won Park, Jung Hoon Ha, Byung Won Cho, Heon Jin Choi

Research output: Contribution to journalArticlepeer-review

Abstract

Despite extensive studies for the last several decades, commercialization of silicon based anode materials for high-capacity batteries is slow. In particular, silicon demonstrates the rapid volumetric changes result in drastic capacity degradation for rechargeable lithium-ion batteries (LIBs). Here, we evaluate uniformly carbon-coated Si nanosheets (C-SiNSs) as effective anode materials in LIBs. We utilize the parylene C, an insulation polymer, to make a coating with a uniform thickness on the SiNSs using the chemical vapor deposition (CVD) method at room temperature. The synthesis method of the C-SiNSs includes a simple pyrolysis process at 950 °C after the uniformed parylene C coating on SiNSs. Particularly, the C-SiNSs coated with 10 nm carbon for anode material improve the capacity and the cycle performance (~2100 mAh g−1 for the 300th cycle at 0.15 C-rate) with approximately 100 % coulombic efficiency.

Original languageEnglish
Article number127358
JournalSurface and Coatings Technology
Volume421
DOIs
Publication statusPublished - 2021 Sep 15

Bibliographical note

Funding Information:
This work was supported by Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT ( 2018M3D1A1058536 ) and a National Research Foundation of Korea (NRF) grant funded by the Korea government ( MSIP ) ( 2017R1A2B3011586 ). This work was also supported by the KIST Institutional Program (Project No. 2E30211 ).

Publisher Copyright:
© 2021 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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