why lower potential barrier is set as 1.0 V for TiO2 as anode for Lithium ion batteries? what happens when is charged till 0.1 V?
Generally, potential window for anodes for LIBs is 0.1 to 3.0 V. It is not same for TiO2, why?
TiO2 exists in several polymorphic modifications: anatase, rutile, brookite, bronze, ramsdellite, hollandite, columbite, and baddeyite. For example, Li insertion in anatase TiO2 occurs at ∼1.72−1.75 V and Li extraction occurs at ∼1.8−1.9 V vs Li.
Therefore, the cut-off voltage for this material is considered to be 1 volt, because at lower voltages, lithium insertion does not occur and there is no change in the material capacity. Meanwhile, lithium metal can be deposited by lowering the working voltage and approaching the potential of Li.
TiO2 exists in several polymorphic modifications: anatase, rutile, brookite, bronze, ramsdellite, hollandite, columbite, and baddeyite. For example, Li insertion in anatase TiO2 occurs at ∼1.72−1.75 V and Li extraction occurs at ∼1.8−1.9 V vs Li.
Therefore, the cut-off voltage for this material is considered to be 1 volt, because at lower voltages, lithium insertion does not occur and there is no change in the material capacity. Meanwhile, lithium metal can be deposited by lowering the working voltage and approaching the potential of Li.
Check these papers for further understanding:
Article High power TiO2 and high capacity Sn-doped TiO2 nanomaterial...
Article Review on recent progress of nanostructured anode materials ...
Thank you Mohammad Mohsen Loghavi and Azhar Ali Haidry for giving information. Very helpful.
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