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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
Ag(6)Mo(2)O(7)F(3)Cl: a new silver cathode material for enhanced ICD primary lithium batteries.
F Sauvage1, V Bodenez, J-M Tarascon
1Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, USA.
Inorganic Chemistry
|June 16, 2010
Summary
Silver hexa-molybdenum oxide fluoride chloride (SMOFC) shows promise as a cathode material for lithium batteries, offering high capacity and excellent ion conduction. Its structure collapses upon lithium insertion, leading to an amorphous state.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-state Chemistry
Background:
- Developing advanced cathode materials is crucial for improving lithium battery performance.
- Ag(6)Mo(2)O(7)F(3)Cl (SMOFC) presents unique structural and electrochemical properties for potential battery applications.
Purpose of the Study:
- To evaluate SMOFC as a cathode material for lithium batteries.
- To investigate the electrochemical behavior and structural evolution of SMOFC during lithium insertion.
Main Methods:
- In situ X-ray diffraction (XRD) measurements.
- High-resolution transmission electron microscopy (HRTEM) investigations.
- Electrochemical performance testing, including capacity and rate capability measurements.
Main Results:
- SMOFC exhibits a gravimetric capacity of approximately 133 mAh/g above 3 V, with two biphasic transitions at 3.46 V and 3.39 V.
- The material demonstrates high silver ion conductivity (sigma(perpendicular[001]) = 3.10(-2) S/cm, sigma(//[001]) = 4.10(-3) S/cm), enabling excellent discharge rate capability.
- Lithium insertion induces a linear isotropic collapse of the SMOFC structure, resulting in a fully amorphous state after four lithium insertions.
Conclusions:
- SMOFC is a promising cathode material for lithium batteries due to its high capacity and excellent ion transport properties.
- The structural transformation to an amorphous state upon lithium insertion influences the material's electrochemical performance and stability.
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