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MLi2Ti6O14 (M = Sr, Ba, 2Na) lithium insertion titanate materials: a comparative study.
Damien Dambournet1, Ilias Belharouak, Khalil Amine
1Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA. dambournet@anl.gov
Inorganic Chemistry
|February 19, 2010
Summary
Strontium, barium, and sodium titanates were studied as lithium insertion materials for lithium-ion batteries. Strontium titanate demonstrated superior capacity and rate capability, showing promise for high-power batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Chemistry
Background:
- Lithium insertion materials are crucial for advanced lithium-ion batteries.
- Titanate compounds offer potential as novel electrode materials.
- Understanding structure-property relationships is key to optimizing battery performance.
Purpose of the Study:
- To investigate MLi(2)Ti(6)O(14) (M = Sr, Ba, 2Na) titanates as lithium insertion materials.
- To compare the structural, morphological, and electrochemical properties of these titanates.
- To evaluate their potential for high-power lithium battery applications.
Main Methods:
- Sol-gel synthesis was employed to prepare the titanate materials.
- Crystallographic analysis was used to understand lithium insertion behavior.
- Electrochemical testing assessed capacity and rate capability.
Main Results:
- Na(2)Li(2)Ti(6)O(14) reversibly hosts two Li(+) ions.
- SrLi(2)Ti(6)O(14) and BaLi(2)Ti(6)O(14) reversibly insert nearly four Li(+) ions per formula unit.
- SrLi(2)Ti(6)O(14) exhibited the highest capacity and best rate capability among the studied materials.
Conclusions:
- The MLi(2)Ti(6)O(14) titanate class shows potential as practical electrode materials.
- SrLi(2)Ti(6)O(14) is a promising candidate for high-power lithium batteries.
- These materials could be utilized in transportation applications requiring high energy density and power.
