TY  - JOUR
AU  - Das, Ashok
AU  - Banerjee, Aritra
AU  - Tayal, Akhil
AU  - Ali, Mir Sahanur
AU  - Layek, Rashbihari
AU  - Karmakar, Srikanta
AU  - Sinha, Pritam
AU  - Kumbhakar, Pathik
AU  - Chattopadhyay, Dipankar
AU  - Bandyopadhyay, Sudipta
TI  - Local Structure Distortion in Mn, Zn Doped Cu<sub>2</sub>V<sub>2</sub>O<sub>7</sub>: Supercapacitor Performance and Emergent Spin-Phonon Coupling
JO  - Advanced materials
VL  - 37
SN  - 0935-9648
CY  - Weinheim
PB  - Wiley-VCH
M1  - PUBDB-2025-01528
SP  - 2416644
PY  - 2025
AB  - Supercapacitors are rapidly gaining attention as next-generation energy storage devices due to their superior power and energy densities. This study pioneers the investigation of Mn/Zn co-doping in 𝜶-Cu<sub>2</sub>V<sub>2</sub>O<sub>7</sub> (CVO) to enhance its performance as a supercapacitor electrode material. Structural and local Structural properties of Mn/Zn co-doped CVO have been investigated through X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS), and X-ray Absorption Spectroscopy (XAS), revealing significant distortions that enhance supercapacitor performance. The optimized sample demonstrates a remarkable specific capacitance of 1950.95 Fg<sup>−1</sup>, energy density of 97.54 Whkg<sup>−1</sup>, and enhanced capacitive retention,attributedtotheuniqueCucoordinationenvironmentandimproved charge transfer kinetics. Temperature-dependent Raman spectroscopy unveils spin-phonon coupling (SPC), particularly in VO<sub>4</sub> stretching modes, supported by magnetic measurements that shows a reduction in the Néel temperature and the emergence of zero field-cooled (ZFC) exchange bias (EB). This work is the first to report the impact of local structure distortion on both supercapacitor performance and SPC in CVO, offering a novel strategy for developing high-performance energy storage materials with spintronics potential. In addition, the assembled symmetric optimized supercapacitor shows a high energy density of 93.32 Whkg<sup>−1</sup> and excellent cycling stability. A prototype device incorporating the optimized CVO successfully powers eight commercial LED bulbs, demonstrating its practical application potential.
LB  - PUB:(DE-HGF)16
C6  - pmid:39865953
UR  - <Go to ISI:>//WOS:001442954600042
DO  - DOI:10.1002/adma.202416644
UR  - https://bib-pubdb1.desy.de/record/627003
ER  -