Статья

Ag or Au Nanoparticle-Embedded One-Dimensional Composite TiO<sub>2</sub> Nanofibers Prepared via Electrospinning for Use in Lithium-Ion Batteries

Sang Hoon NamDepartment of Materials Science and Engineering and Research Institute for Solar & Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST), 261 Chemdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea, and Department of Mechanical Engineering, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030Hee-Sang ShimDepartment of Materials Science and Engineering and Research Institute for Solar & Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST), 261 Chemdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea, and Department of Mechanical Engineering, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030Youn-Su KimDepartment of Materials Science and Engineering and Research Institute for Solar & Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST), 261 Chemdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea, and Department of Mechanical Engineering, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030Mushtaq Ahmad DarDepartment of Materials Science and Engineering and Research Institute for Solar & Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST), 261 Chemdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea, and Department of Mechanical Engineering, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030Jong Guk KimDepartment of Materials Science and Engineering and Research Institute for Solar & Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST), 261 Chemdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea, and Department of Mechanical Engineering, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030Won Bae KimDepartment of Materials Science and Engineering and Research Institute for Solar & Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST), 261 Chemdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea, and Department of Mechanical Engineering, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030

2010en

ABI

Аннотация

We prepared metallic-nanoparticle-embedded one-dimensional titanium dioxide (1D-TiO2) via a one-step electrospinning process, in which Au or Ag metallic nanoparticles between 5 and 10 nm in diameter were incorporated within the TiO2 nanofibers. After calcination of the composite nanofibers at high temperature of 450 °C, the nanofibers were converted to 1D-TiO2 by the thermal decomposition of polyvinylpyrrolidone (PVP). This process simultaneously changed the metal precursors (AgNO3 or HAuCl4·3H2O) to metallic nanoparticles (Ag or Au) to produce 1D-TiO2 nanofiber composites (Ag@1D-TiO2 or Au@1D-TiO2). The influences of Ag or Au incorporation into the 1D-TiO2 nanofibers were studied using various microscopic and X-ray spectroscopic methods. Because of the changes in crystallinity and size of TiO2 in the Ag@1D-TiO2 and Au@1D-TiO2 nanostructures, lithium-ion diffusion and charge transfer were promoted. In particular, in comparison to pristine 1D-TiO2, the specific capacity of metal nanoparticle-embedded 1D-TiO2 nanofiber composites was increased by at least 20%, and the rate performance was improved 2-fold. Consequently, we propose that these metal-nanoparticle-embedded 1D-nanostructures prepared via electrospinning may be useful as electrodes in lithium-ion batteries.

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Идентификаторы

DOI: 10.1021/am100319u

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Цитирований: 2Использованных источников: 0

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