Transition Metal-Doped Lithium Titanium Oxide Nanoparticles Made Using Flame Spray Pyrolysis
- Karhunen, T. Fine Particle and Aerosol Technology Laboratory, Department of Environmental Science, University of Eastern Finland, 70211 Kuopio, Finland
- Lähde, A. Fine Particle and Aerosol Technology Laboratory, Department of Environmental Science, University of Eastern Finland, 70211 Kuopio, Finland
- Leskinen, J. Fine Particle and Aerosol Technology Laboratory, Department of Environmental Science, University of Eastern Finland, 70211 Kuopio, Finland
- Büchel, R. Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zürich, 8092 Zürich, Switzerland
- Waser, O. Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zürich, 8092 Zürich, Switzerland
- Tapper, U. Fine Particles, VTT Technical Research Centre of Finland, 02044 VTT, Finland
- Jokiniemi, J. Fine Particles, VTT Technical Research Centre of Finland, 02044 VTT, Finland
Published in:
- ISRN Nanotechnology. - Hindawi Limited. - 2011, vol. 2011, p. 1-6
English
Defect spinel phase lithium titanate (Li4 Ti5 O12 ) has been suggested
as a promising negative electrode material for next generation lithium ion batteries. However, it suffers from low electrical
conductivity. To overcome this problem conduction path length can be reduced by decreasing the primary particle size. Alternatively
the bulk conductivity of Li4 Ti5 O12 can be increased by doping it with a conductive additive. In this paper a steady, single-step gas-phase technique for lithium titanate synthesis that combines both approaches is described. The process is used to produce
doped Li4 Ti5 O12 nanoparticles with primary particle size of only 10 nm. The product is found to consist of single-crystalline nanoparticles with high phase and elemental purity. Two dopant materials are tested and found to behave very differently. The silver dopant forms a separate phase of nanometre-sized particles of metallic silver which agglomerate with Li4 Ti5 O12 . The copper
dopant, on the other hand, reacts with the lithium titanate to form a double spinel phase ofLi 3 ( Li 1 − 2 x Cu 3 x Ti 5 − x ) O 12
as a promising negative electrode material for next generation lithium ion batteries. However, it suffers from low electrical
conductivity. To overcome this problem conduction path length can be reduced by decreasing the primary particle size. Alternatively
the bulk conductivity of Li
doped Li
dopant, on the other hand, reacts with the lithium titanate to form a double spinel phase of
- Language
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- English
- Open access status
- gold
- Identifiers
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- DOI 10.5402/2011/180821
- ISSN 2090-6064
- Persistent URL
- https://folia.unifr.ch/global/documents/207117
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