Uniquely structured Sb nanoparticle-embedded carbon/reduced graphene oxide composite shell with empty voids for high performance sodium-ion storage

Jin Sung Park, Yun Chan Kang

    Research output: Contribution to journalArticlepeer-review

    48 Citations (Scopus)

    Abstract

    Nanostructure design that can effectively buffer volume changes during electrochemical reactions and compositing with carbonaceous materials are considered effective strategies in enhancing the electrochemical properties of Sb-based electrode materials for sodium-ion batteries. In this study, uniquely structured Sb nanoparticle-embedded hollow carbon/reduced graphene oxide (rGO)hybrid microspheres are prepared via facile spray pyrolysis and subsequent one-step heat treatment. Decomposition of metal tartrate chelate results in hollow microspheres with shells containing void spaces. Ultrasmall nanocrystals embedded in carbon/rGO walls are formed due to the inhibition of crystal growth by the rGO matrix surrounding them. The uniqueness of the structure and compositing with rGO matrix enable remarkable electrochemical properties when the microspheres are applied as anode material for sodium-ion batteries. The discharge capacity of the microspheres for the 2nd cycle when cycled at a current density of 0.5 A g−1 is 433 mA h g−1, and the capacity retention after 500 cycles, calculated from the 5th cycle, is 80%. They also exhibit excellent rate capability; a discharge capacity as high as 323 mA h g−1 is achieved at a current density of 3.0 A g−1.

    Original languageEnglish
    Pages (from-to)227-237
    Number of pages11
    JournalChemical Engineering Journal
    Volume373
    DOIs
    Publication statusPublished - 2019 Oct 1

    Bibliographical note

    Funding Information:
    This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( 2017R1D1A1B03034473 and NRF- 2017R1A4A1014806 ).

    Publisher Copyright:
    © 2019 Elsevier B.V.

    Keywords

    • Antimony
    • Graphene oxide
    • Nanostructured materials
    • Sodium-ion batteries
    • Spray pyrolysis

    ASJC Scopus subject areas

    • General Chemistry
    • Environmental Chemistry
    • General Chemical Engineering
    • Industrial and Manufacturing Engineering

    Fingerprint

    Dive into the research topics of 'Uniquely structured Sb nanoparticle-embedded carbon/reduced graphene oxide composite shell with empty voids for high performance sodium-ion storage'. Together they form a unique fingerprint.

    Cite this