One-pot spray pyrolysis for core–shell structured Sn@SiOC anode nanocomposites that yield stable cycling in lithium-ion batteries

Sung Eun Wang, Jin Sung Park, Min Ji Kim, Yun Chan Kang, Dae Soo Jung

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    A novel strategy is reported for the synthesis of high-capacity anode materials with good cycling stability for use in lithium-ion batteries. A facile one-pot spray pyrolysis process is conducted using an ethanol solution of Sn acetate and diphenylsilanediol (DPSD). Phase separation between Sn and DPSD leads to the formation of core@shell-structured Sn@DPSD nanoparticles, and subsequent heat-treatment in an inert atmosphere carbonizes the DPSD to form Sn@SiOC nanoparticles (∼50 nm). When applied as an anode material in lithium-ion batteries (LIBs), the Sn core retains its high energy density, while the SiOC shell limits volume expansion of the core and protects it from pulverization and agglomeration. The Sn@SiOC nanoparticles exhibit a reversible capacity of 917 mA h g 1 at 0.1C and stable cycling performance for 200 cycles at 1C. The nanoparticle formation mechanism is investigated by optimizing the Sn acetate/DPSD ratio in the precursor solution, and the origin of the enhanced properties is investigated by comparing the results of Sn@SiOC nanoparticles with those of SiOC nanoparticles and Sn microspheres. SiOC shows considerable promise as a coating material for Sn nanoparticles, which may serve as a milestone in the synthesis of nanosized electrode materials with coatings that can prolong the cycle lives of rechargeable batteries.

    Original languageEnglish
    Article number152952
    JournalApplied Surface Science
    Volume589
    DOIs
    Publication statusPublished - 2022 Jul 1

    Bibliographical note

    Funding Information:
    This research was supported by the National R&D Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2021M3H4A3A02086100) and the “Policy R&D program” funded by the Korea Institute of Ceramic Engineering and Technology (KICET), Republic of Korea.

    Publisher Copyright:
    © 2022 Elsevier B.V.

    Keywords

    • Anode
    • Core-shell structure
    • Lithium-ion battery
    • SiOC
    • Sn nanoparticle
    • Spray pyrolysis

    ASJC Scopus subject areas

    • General Chemistry
    • Condensed Matter Physics
    • General Physics and Astronomy
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films

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