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JG Kim, D Shi, KJ Kong, YU Heo, JH Kim, MR Jo, YC Lee, YM Kang and SX Dou
Abstract
The morphology and electronic structure of metal oxides, including TiO2 on the nanoscale, definitely determine their electronic or electrochemical properties, especially those relevant to application in energy devices. For this purpose, a concept for controlling the morphology and electrical conductivity in TiO2, based on tuning by electrospinning, is proposed. We found that the 1D TiO2 nanofibers surprisingly gave higher cyclic retention than 0D nanopowder, and nitrogen doping in the form of TiO2Nx also caused further improvement. This is due to higher conductivity and faster Li+ diffusion, as confirmed by electrochemical impedance spectra. Our findings provide an effective and scalable solution for energy storage efficiency.
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Concepts
Lithium, Electrode, Cadmium, Oxide, Capacitor, Rechargeable battery, Electrochemistry, Battery
MeSH headings
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