Related Experiment Video
Updated: May 30, 2025
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.0K
Local Structure Distortion in Mn, Zn Doped Cu₂V₂O₇: Supercapacitor Performance and Emergent Spin-Phonon Coupling
Ashok Das1, Aritra Banerjee1,2, Akhil Tayal3
1Department of Physics, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India.
Advanced Materials (Deerfield Beach, Fla.)
|January 27, 2025
Summary
This study enhances supercapacitor performance by co-doping α-Cu₂V₂O₇ with Mn/Zn, achieving high energy density and stability. The research reveals spin-phonon coupling, offering potential for spintronics applications.
Area of Science:
- Materials Science
- Electrochemistry
- Condensed Matter Physics
Background:
- Supercapacitors are crucial for next-generation energy storage.
- Improving electrode material performance is key to advancing supercapacitor technology.
Purpose of the Study:
- To investigate Mn/Zn co-doping in α-Cu₂V₂O₇ (CVO) for enhanced supercapacitor electrode performance.
- To explore the relationship between local structure distortion, spin-phonon coupling, and supercapacitor properties.
Main Methods:
- X-ray Diffraction (XRD), SEM, TEM, XPS, XAS for structural analysis.
- Temperature-dependent Raman spectroscopy and magnetic measurements for physical property investigation.
- Electrochemical testing to evaluate supercapacitor performance.
Main Results:
- Optimized Mn/Zn co-doped CVO exhibits a specific capacitance of 1950.95 Fg⁻¹, energy density of 97.54 Whkg⁻¹, and improved capacitive retention.
- Evidence of spin-phonon coupling (SPC) and exchange bias (EB) was observed, linked to local structure distortions.
- A symmetric supercapacitor device demonstrated high energy density (93.32 Whkg⁻¹) and excellent cycling stability, powering LEDs.
Conclusions:
- Mn/Zn co-doping significantly enhances CVO performance as a supercapacitor electrode material.
- Local structure distortion plays a critical role in improving electrochemical properties and inducing SPC.
- This work presents a novel strategy for high-performance energy storage materials with spintronics potential.
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