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Li-Doping-Induced Structural and Electronic Structure Modulation in MgTiO3 for an Electrochemical Energy Storage
Priyanka1, Aditya Sharma2, Bhavi Agrawal2
1Department of Sciences (Physics), Manav Rachna University, Faridabad, Haryana 121004, India.
Lithium doping in magnesium titanate (MgTiO3) ceramics enhances electrochemical energy storage. This Li-doped material demonstrates improved specific capacitance and stable performance in supercapacitor devices.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Chemistry
Background:
- Magnesium titanate (MgTiO3) ceramics are explored for energy storage applications.
- Understanding the relationship between material structure and electrochemical performance is crucial.
Purpose of the Study:
- To investigate the impact of lithium (Li) doping on the crystal structure, electronic properties, and energy storage mechanisms of MgTiO3 ceramics.
- To evaluate the electrochemical performance of Li-doped MgTiO3 in supercapacitor devices.
Main Methods:
- Solid-state reaction method for synthesizing Li-doped MgTiO3 ceramics.
- X-ray absorption near-edge structure (XANES) spectroscopy to analyze electronic structure.
- Three-electrode and two-electrode (Swagelok cell) configurations for electrochemical testing.
Main Results:
- Li doping increased occupied density of states and altered XANES spectra.
- The Mg2TiO4 phase formation was observed with increasing Li content.
- Specific capacitances reached up to 309.0 F/g for 10Li-MgTiO3.
- Supercapacitor devices showed an energy density of 46 Wh/kg and retained >71% capacity after 10,000 cycles.
Conclusions:
- Li doping effectively enhances the electrochemical energy storage capability of MgTiO3 ceramics.
- The doped material exhibits promising performance for practical supercapacitor applications.
- The study correlates structural and electronic modifications with improved energy storage mechanisms.
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