Sn/SnOx-loaded uniform-sized hollow carbon spheres on graphene nanosheets as an anode for lithium-ion batteries

Jeongyeon Lee, Taejin Hwang, Jiseop Oh, Jong Min Kim, Youngmoo Jeon, Yuanzhe Piao

    Research output: Journal article publicationJournal articleAcademic researchpeer-review

    15 Citations (Scopus)

    Abstract

    To meet the increasing demands for large-scalable application required high capacity and energy density, Sn-based materials as a promising anode for lithium-ion batteries have been widely studied. In this work, a carbon nanostructure of uniform-sized hollow carbon spheres on a graphene nanosheet was prepared by a facile synthesis process. The obtained nanostructure has numerous uniform-sized hollow carbon spheres with a diameter of ∼20 nm attached on graphene nanosheets, and mass production is considerably easy. Then, Sn/SnOx was loaded into the carbon nanostructure by a typical melt diffusion process, and its electrode delivers the high rate capability of 290.0 mA g−1 at 3.0 A g−1 and the good cyclability of 284.1 mA h g−1 after 1000 cycles at 1.0 A g−1. The excellent electrochemical performance is attributed to the unique carbon nanostructure, which mitigates the volume expansion of Sn by the physical barrier of uniform-sized hollow carbon spheres and enables Li-ions or electrons to easily move by the improving electrical conductivity during discharge/charge process. Thus, the Sn loaded nanocomposite is expected to be a promising anode material for lithium-ion batteries.

    Original languageEnglish
    Pages (from-to)42-50
    Number of pages9
    JournalJournal of Alloys and Compounds
    Volume736
    DOIs
    Publication statusPublished - 5 Mar 2018

    Keywords

    • Graphene
    • Hollow carbon nanosphere
    • Lithium-ion batteries
    • Melt diffusion process
    • Sn loaded nanocomposite

    ASJC Scopus subject areas

    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

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