title: Ultrafast Lithium Storage Using Antimony-Doped Tin Oxide Nanoparticles Sandwiched between Carbon Nanofibers and a Carbon Skin.
abstract: Metal oxides as anode materials for Li-ion batteries (LIBs) are of significant interest to many potential technologies because of their high theoretical capacity value, low price, and environmentally friendly features. In spite of these considerable benefits and ongoing progress in the field, momentous challenges exist, related with structural disintegration due to volume expansion of electrode materials. This leads to rapid capacity decline and must be resolved in order to progress for realistic utilization of LIBs with ultrafast cycling stability. This article proposes a novel architecture of Sb-doped SnO2nanoparticles sandwiched between carbon nanofiber and carbon skin (CNF/ATO/C) using electrospinning and hydrothermal methods. The CNF/ATO/C exhibits superb electrochemical behavior such as high specific capacity and outstanding cycling stability (705 mA h g-1after 100 cycles), outstanding high-rate performance (411 mA h g-1at 2000 mA g-1), and ultrafast cycling stability (347 mA h g-1at 2000 mA g-1after 100 cycles), which is high compared to any reported value using SnO2-based anode materials. Thus, this unique architecture furnishes profitable effects, including electroactive sites, structural stability, and electrical conductivity, which can potentially be realizes for ultrafast LIBs.
authors.affiliation: Program of Materials Science & Engineering, Convergence Institute of Biomedical Engineering and Biomaterials and ‡Department of Materials Science and Engineering, Seoul National University of Science and Technology , Seoul 139-743, Korea.
authors.forename: Geon-Hyoung
authors.initials: GH
authors.lastname: An
authors.affiliation: Program of Materials Science & Engineering, Convergence Institute of Biomedical Engineering and Biomaterials and ‡Department of Materials Science and Engineering, Seoul National University of Science and Technology , Seoul 139-743, Korea.
authors.forename: Do-Young
authors.initials: DY
authors.lastname: Lee
authors.affiliation: Program of Materials Science & Engineering, Convergence Institute of Biomedical Engineering and Biomaterials and ‡Department of Materials Science and Engineering, Seoul National University of Science and Technology , Seoul 139-743, Korea.
authors.forename: Yu-Jin
authors.initials: YJ
authors.lastname: Lee
authors.affiliation: Program of Materials Science & Engineering, Convergence Institute of Biomedical Engineering and Biomaterials and ‡Department of Materials Science and Engineering, Seoul National University of Science and Technology , Seoul 139-743, Korea.
authors.forename: Hyo-Jin
authors.initials: HJ
authors.lastname: Ahn
keywords: Li-ion battery; anode; antimony-doped tin oxide; carbon skin; sandwich structure