Many alternative anode materials for lithium-ion batteries that form alloys with lithium experience problems of large volume expansion, which lead to rapid capacity fade. Anode materials based on intercalation reactions have little volume expansion. One potential anode candidate that experience intercalation is titanium dioxide. It is a fast lithium insertion/extraction host with a high theoretical capacity of 336 mAh g-1, and has the added advantages of low cost, low-volume expansion (3-4%) during lithium insertion, non-toxicity, an appropriate insertion potential (~2.0 V), and environmental friendliness. However, chemical diffusion and electrochemical conductivity of titania are poor in electrochemical reactions. Here we will present results of the synthesized titania nanostructures and their electrochemical performance as lithium ion battery anode. For as-prepared TiO2 nanofibers, XRD measurements show that they were composed with two phases: anatase and rutile. Electrochemical measurements prove that the optimal ratio is 28% of anatase to rutile with the best electrochemical performance.

Nanostructured titania as lithium-ion battery electrode

246th National Meeting (2013)

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