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ACS Appl Mater Interfaces. 2013 Feb;5(3):691-6. doi: 10.1021/am302197y. Epub 2013 Jan 24.

Structurally and electronically designed TiO₂Nx nanofibers for lithium rechargeable batteries.

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1
Institute for Superconducting and Electronic Materials, University of Wollongong, Innovation Campus, North Wollongong, NSW 2500, Australia.

Abstract

The morphology and electronic structure of metal oxides, including TiO(2) 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 TiO(2), based on tuning by electrospinning, is proposed. We found that the 1D TiO(2) nanofibers surprisingly gave higher cyclic retention than 0D nanopowder, and nitrogen doping in the form of TiO(2)N(x) 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.

PMID:
23305151
DOI:
10.1021/am302197y
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