Boosting Ion Transport Kinetics in Sulfolane‐Modified Aqueous Electrolytes for High‐Performance Zinc‐Ion Batteries with V₂C MXene Cathodes DOI Open Access

John Moses,

Naveen T. Bharanitharan,

T. Selvam

et al.

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract The advancement of zinc‐ion batteries (ZIBs) is propelled by their inherent safety, cost‐effectiveness, and environmental sustainability. This study investigates the role sulfolane (SL), a polar aprotic solvent with high dielectric constant, as an electrolyte additive to enhance ion transport electrochemical performance in V₂C MXene cathodes for high‐performance ZIBs. addition 1% SL optimizes Zn‐ion increasing ionic conductivity, suppressing decomposition, mitigating zinc dendrite formation. Galvanostatic Intermittent Titration Technique (GITT) analysis reveals reduction Zn 2 ⁺ diffusion coefficient from 1.54 × 10⁻⁷ cm /s m ZnSO₄ 1.07 10⁻⁹ s −1 SL‐modified system, indicating more confined environment. Electrochemical Impedance Spectroscopy (EIS) further demonstrates substantial decrease activation energy 123.78 65.08 kJ mol⁻¹, signifying improved charge transfer kinetics. Ex situ XRD confirms that stabilizes phase transformation Zn₀.₂₉V₂O₅, enhancing structural integrity. modified system achieves impressive specific capacity 545 mAh g⁻¹ at 0.5 A exhibits exceptional cycling stability, retaining 91% over 7000 cycles 20 g⁻¹. These findings underscore potential key advancing MXene‐based

Language: Английский

Boosting Ion Transport Kinetics in Sulfolane‐Modified Aqueous Electrolytes for High‐Performance Zinc‐Ion Batteries with V₂C MXene Cathodes DOI Open Access

John Moses,

Naveen T. Bharanitharan,

T. Selvam

et al.

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract The advancement of zinc‐ion batteries (ZIBs) is propelled by their inherent safety, cost‐effectiveness, and environmental sustainability. This study investigates the role sulfolane (SL), a polar aprotic solvent with high dielectric constant, as an electrolyte additive to enhance ion transport electrochemical performance in V₂C MXene cathodes for high‐performance ZIBs. addition 1% SL optimizes Zn‐ion increasing ionic conductivity, suppressing decomposition, mitigating zinc dendrite formation. Galvanostatic Intermittent Titration Technique (GITT) analysis reveals reduction Zn 2 ⁺ diffusion coefficient from 1.54 × 10⁻⁷ cm /s m ZnSO₄ 1.07 10⁻⁹ s −1 SL‐modified system, indicating more confined environment. Electrochemical Impedance Spectroscopy (EIS) further demonstrates substantial decrease activation energy 123.78 65.08 kJ mol⁻¹, signifying improved charge transfer kinetics. Ex situ XRD confirms that stabilizes phase transformation Zn₀.₂₉V₂O₅, enhancing structural integrity. modified system achieves impressive specific capacity 545 mAh g⁻¹ at 0.5 A exhibits exceptional cycling stability, retaining 91% over 7000 cycles 20 g⁻¹. These findings underscore potential key advancing MXene‐based

Language: Английский

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