Urea-lactic acid as efficient lignin solvent and its practical utility in sustainable electrospinning – electrochemical studies dataset

The development of lignin-based materials presents a promising avenue for advancing green chemistry and mitigating environmental impact. However, the key challenge lies in lignin's processability, which significantly affects its practical applications. Addressing the complex structure, variability, and reactivity of lignin is crucial for optimizing its incorporation into high-performance materials. Therefore, in this study, we explore the efficacy of a urea-lactic acid-based deep eutectic solvent (ULA) for the dissolution of kraft lignin, aiming to enhance its practical utility in sustainable electrospinning processes for the first time. 

Preliminary results of electrochemical impedance spectroscopy and galvanostatic charge/discharge measurements confirm that the EDLC with a prepared hydrogel electrolyte demonstrates attractive electrochemical properties, which are comparable with the reference cell based on a commercial glass fibre separator. Hence, the DES-assisted electrospun lignin membrane can be viewed as a potential gel electrolyte matrix for practical use in the construction of sustainable energy storage devices.

This dataset presents the electrochemical characterization of supercapacitors employing a hydrogel electrolyte derived from electrospun lignin and an aqueous 2.5 M lithium acetate solution.

This research was partially funded by the National Science Centre, Poland (grant No. 2023/07/X/ST5/00629). For Open Access, the author has applied a CC-BY public copyright to any Author Accepted Manuscript (AAM) version arising from this submission.