Ultrafine Sn Nanoparticles Anchored on Nitrogen- and Phosphorus-Doped Hollow Carbon Frameworks for Lithium-Ion Batteries

Jiseop Oh, Jeongyeon Lee, Youngmoo Jeon, Jong Min Kim, Kwang dong Seong, Taejin Hwang, Seungman Park, Yuanzhe Piao

    Research output: Journal article publicationJournal articleAcademic researchpeer-review

    11 Citations (Scopus)

    Abstract

    Nanosized Sn-based materials as anodes in lithium-ion batteries suffer from capacity fading because of aggregation and severe volume change (∼300 %) during the charge/discharge process. We developed ultrafine Sn nanoparticles anchored on a graphene-hollow carbon framework as anode material. Graphene-hollow carbon framework (G-HCF) anchors ultrafine Sn nanoparticles on its surface to prevent aggregation. The hollow structure can provide a buffer space to accommodate the volume expansion of the Sn particles and prevents electrode pulverization during the charge/discharge process. Furthermore, the interconnected hollow carbon structure enables rapid lithium-ion and electron transport to give the enhanced rate performance. Also, the G-HCF was doped with nitrogen and phosphorus to stabilize its electrochemical performance. Consequently, the as-prepared G-HCF-Sn composite exhibited a highly stable cycling performance, even at a current density of 1.0 A/g (specific capacity of 1048 mA h/g after 1000 cycles).

    Original languageEnglish
    Pages (from-to)2098-2104
    Number of pages7
    JournalChemElectroChem
    Volume5
    Issue number15
    DOIs
    Publication statusPublished - 1 Aug 2018

    Keywords

    • cyclability
    • doping
    • electrochemistry
    • hollow carbon framework
    • nanoparticles

    ASJC Scopus subject areas

    • Catalysis
    • Electrochemistry

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