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Updated: Jun 9, 2025
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
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Charge transfer induced phase transition in Li2MnO3at high pressure
Ajinkya P Khangal1,2, Nishant N Patel1, Ajay K Mishra1,2
1High Pressure & Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
Summary
Lithium manganese oxide (Li2MnO3) shows a new low-symmetry phase transition under high pressure, crucial for developing advanced energy storage materials. This research reveals its structural and vibrational properties, aiding in the design of efficient batteries.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Energy Storage
Background:
- Efficient energy storage materials are vital for reducing fossil fuel dependence.
- Lithium manganese oxide (Li2MnO3) is a promising candidate for energy storage applications.
Purpose of the Study:
- To synthesize and investigate the high-pressure structural and vibrational properties of Li2MnO3.
- To understand the phase transitions and bonding characteristics of Li2MnO3 under pressure.
Main Methods:
- Solid-state synthesis route for Li2MnO3.
- High-pressure structural studies up to ~22 GPa.
- High-pressure vibrational (Raman) studies up to ~26 GPa.
- Fitting P-V data with the third-order Birch-Murnaghan equation of state.
Main Results:
- A second-order phase transition to a monoclinic (P21/n) low-symmetry phase was observed around 2.3 GPa.
- The bulk modulus and its derivative were determined to be 113.3 ± 13.1 GPa and 4.1 ± 1.2, respectively.
- Positive Mode Grüneisen parameters indicate no soft modes, and spectroscopic changes suggest enhanced covalent character in Li-O bonds.
Conclusions:
- Li2MnO3 undergoes a pressure-induced structural phase transition.
- The material exhibits robust structural stability with no soft modes.
- Spectroscopic evidence points to modified bonding under pressure, relevant for energy storage applications.
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