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Li+ Insertion in Nanostructured TiO2 for Energy Storage.
Mara Serrapede1, Umberto Savino1,2, Micaela Castellino2
1Center for Sustainable Future Technologies - Istituto Italiano di Tecnologia, via Livorno, 60 - 10144 Torino, Italy.
Materials (Basel, Switzerland)
|December 22, 2019
Summary
Titanium dioxide (TiO2) nanostructures were prepared and tested for energy storage. Non-stoichiometric amorphous TiO2 demonstrated high stability for Li-ion batteries, while anatase TiO2 showed promise for general energy storage devices.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Nanostructured materials offer enhanced properties for energy conversion and storage.
- Titanium dioxide (TiO2) is a versatile material for these applications due to its diverse nanostructures.
Purpose of the Study:
- To compare the performance of titanium dioxide (TiO2) nanostructures prepared via different thermal treatments.
- To evaluate their suitability for energy storage applications, particularly Li-ion batteries.
Main Methods:
- Titanium dioxide (TiO2) was synthesized through the oxidation of Ti foils in hydrogen peroxide.
- Two distinct thermal treatments were applied: 150 °C in Ar and 450 °C in air.
- Material characterization and electrochemical performance testing were conducted.
Main Results:
- The 150 °C treatment yielded non-stoichiometric, amorphous TiO2, exhibiting high stability.
- The 450 °C treatment resulted in crystalline anatase TiO2.
- Non-stoichiometric TiO2 showed promise for high-power Li-ion batteries, while anatase TiO2 displayed lower cyclability but potential for energy storage.
Conclusions:
- Non-stoichiometric amorphous TiO2 is a highly stable material suitable for high-power Li-ion battery applications.
- Anatase TiO2, while less cyclable, remains a promising material for broader energy storage applications.
