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Manufacturing of TiO2 nanotubes for lithium-ion batteries
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
2015 (English)Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Microelectronic equipment is continuously getting smaller and smaller and thus sets higher and higher demands on the energy and power densities of the batteries that are used to drive them. For surface mounted batteries the surface area of the battery becomes more and more important as the size of the electronic components decreases. The high demands on the energy and power densities per footprint area render the traditional thin film lithium-ion batteries unsuitable and 3D microbatteries are instead proposed to meet these new demands [1, 2]. The high surface area, short diffusion paths and increased mass loadings compared to for thin film batteries makes it possible for the 3D microbatteries to provide a higher energy density per footprint area as well as a high power density [1, 3, 4].

Electrochemical anodization of titanium foil in fluoride containing electrolytes makes it possible to grow self-assembled TiO2 nanotubes with an almost perfect hexagonal structure. This 3D structure has been shown to perform well as a binder free anode material for lithium-ion batteries and the nanotubes are usually annealed to convert the as-formed TiO2 to anatase. The TiO2 nanotubes have shown a high capacity per footprint area and a good cycling stability which makes them suitable for applications in 3D microbatteries [3].

In the work presented here TiO2 nanotubes of different lengths, i.e. from 4.5 to 40 µm, have been synthesized employing an anodization approach. The obtained nanotubes, which were characterized with scanning electron microscopy and X-ray diffraction experiments, were also evaluated as electrodes in lithium-ion batteries containing lithium foil counter electrodes. The results of these investigations will be discussed.

 

References

 

  1. Roberts M, Johns P, Owen J, Brandell D, Edstrom K, Enany GE, Guery C, Golodonitsky D, Lacey M, Lecoeur C, Mazor H, Peled E, Perre E, Shaijumon MM, Simon P, Taberna P-L. 3D lithium ion batteries—from fundamentals to fabrication. J. Mater. Chem. 2011;21:9876–90.
  2. Edström K, Brandell D, Gustafsson T, Nyholm L. Electrodeposition as a tool for 3D microbattery fabrication. Electrochem. Soc. Interface. 2011;20:41–6.
  3. Wei W, Oltean G, Tai C-W, Edström K, Björefors F, Nyholm L. High energy and power density TiO2 nanotube electrodes for 3D Li-ion microbatteries. J. Mater. Chem. A. 2013;1:8160-9.
  4. Yiping T, Xiaoxu T, Guangya H, Guoqu Z. Nanocrystalline Li4Ti5O12-coated TiO2 nanotube arrays as three-dimensional anode for lithium-ion batteries. Electrochimica Acta. 2014;117:172–8.
  5. Roy P, Berger S, Schmuki P. TiO2 Nanotubes: Synthesis and Applications. Angew. Chem. Int. Ed. 2011;50:2904–39.
Place, publisher, year, edition, pages
2015.
Keywords [en]
TiO2, nanotubes, lithium, batteries, free-standing
National Category
Inorganic Chemistry
Research subject
Chemistry with specialization in Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-337040OAI: oai:DiVA.org:uu-337040DiVA, id: diva2:1168046
Conference
Oorgandagarna 2015
Available from: 2017-12-19 Created: 2017-12-19 Last updated: 2017-12-19

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