Spherical Sb Core/Nb 2 O 5 -C Double-Shell Structured Composite as an Anode Material for Li Secondary Batteries

Hyungeun Seo, Kyungbae Kim and Jae-Hun Kim
Additional contact information
Hyungeun Seo: School of Materials Science and Engineering, Kookmin University, Seoul 02707, Korea
Kyungbae Kim: School of Materials Science and Engineering, Kookmin University, Seoul 02707, Korea
Jae-Hun Kim: School of Materials Science and Engineering, Kookmin University, Seoul 02707, Korea

Energies, 2020, vol. 13, issue 8, 1-10

Abstract: Antimony (Sb)-based materials are considered to be attractive for use in Li secondary battery anodes because of their high capacity. However, their huge volume change during Li insertion-extraction cycling limits their cycle performance. The Sb-active material can be combined with intercalation-based active materials to address these issues. In this study, spherical Sb core/Nb 2 O 5 shell structured composite materials were synthesized through a simple solvothermal process and a carbon coating was simultaneously added during heat treatment using a naphthalene precursor. The resulting double-shelled materials were characterized with X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and electron microscopy. The electrochemical test results showed that a reversible capacity of more than 450 mAh g −1 was retained after 100 cycles. This improved performance is ascribed to the double-shelled structure. The large volume change of the nano-sized Sb core material was alleviated by the double-shelled structure, which consisted of crystalline orthorhombic Nb 2 O 5 and amorphous carbon. The shell materials also aided rapid charge transport.

Keywords: antimony; niobium oxide; composite; anode; Li battery (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/13/8/1999/pdf (application/pdf)
https://www.mdpi.com/1996-1073/13/8/1999/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:13:y:2020:i:8:p:1999-:d:347071

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().