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Updated: May 31, 2026
10:58
Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
Published on: March 7, 2018
Structure and lithium transport pathways in Li2FeSiO4 cathodes for lithium batteries
A Robert Armstrong1, Navaratnarajah Kuganathan, M Saiful Islam
1School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9ST, UK.
Journal of the American Chemical Society
|July 12, 2011
Summary
Exploring new lithium battery cathodes like Li(2)FeSiO(4) is crucial. Computer modeling reveals its cycled structure transforms, altering lithium-ion transport paths for improved battery performance.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Chemistry
Background:
- Li(2)FeSiO(4) is a promising low-cost cathode material for large-scale lithium batteries.
- Understanding structural changes during battery cycling is essential for material optimization.
Purpose of the Study:
- To elucidate the structural transformation of Li(2)FeSiO(4) during electrochemical cycling.
- To characterize the changes in lithium-ion transport pathways in the cycled material.
Main Methods:
- X-ray diffraction analysis of as-prepared and cycled Li(2)FeSiO(4).
- Computational modeling to determine atomic structure and ion diffusion pathways.
Main Results:
- The as-prepared γ(s) polymorph transforms into an inverse β(II) polymorph upon cycling.
- This transformation involves the inversion of tetrahedra, altering cation-oxygen bonding and layer structure.
- Computer modeling revealed distinct zigzag Li(+) transport paths in the cycled structure, differing from the as-prepared material.
Conclusions:
- The structural evolution of Li(2)FeSiO(4) significantly impacts its electrochemical properties.
- The identified Li(+) transport mechanisms in the cycled material provide insights for designing advanced lithium batteries.
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