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.木质素基材料的开发为推进绿色化学发展、降低环境影响提供了极具潜力的路径。然而，木质素的加工性能是制约其实际应用的核心瓶颈，对其实际应用效果影响显著。破解木质素复杂的结构特性、组分异质性与反应活性难题，对优化其在高性能材料中的掺混应用至关重要。为此，本研究首次探究了基于尿素-乳酸的低共熔溶剂（urea-lactic acid-based deep eutectic solvent, ULA）对牛皮纸木质素（kraft lignin）的溶解效果，旨在提升其在可持续静电纺丝工艺中的实际应用价值。 电化学阻抗谱（electrochemical impedance spectroscopy, EIS）与恒流充放电（galvanostatic charge/discharge）测试的初步结果证实，采用本研究制备的水凝胶电解质的双电层电容器（electric double-layer capacitor, EDLC）展现出优异的电化学性能，其性能可与基于商用玻璃纤维隔膜的参比电池相媲美。因此，经低共熔溶剂辅助制备的静电纺丝木质素膜，可作为潜在的凝胶电解质基质，用于构建可持续储能器件的实际应用场景。 本数据集收录了采用静电纺丝木质素与2.5 M乙酸锂水溶液制备的水凝胶电解质的超级电容器电化学表征数据。 本研究受到波兰国家科学中心（资助编号：2023/07/X/ST5/00629）的部分资助。为实现开放获取，作者已为本次投稿产生的所有作者接受稿（Author Accepted Manuscript, AAM）版本应用CC-BY公共版权许可。