Investigations on electrical, electrochemical, and thermal properties of gelatine-based novel biopolymer electrolytes for energy storage applications

IF 2.4 4区化学 Q3 CHEMISTRY, PHYSICAL Ionics Pub Date : 2024-08-06 DOI:10.1007/s11581-024-05750-8

C. Naveen, M. Muthuvinayagam, Khalid A. Alrashidi, Saikh Mohammad, S. Vigneshwaran, SaravanaVadivu Arunachalam, Mohd Ikmar Nizam Isa

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Abstract

Economical and environmentally friendly natural polymer electrolytes are prepared using a combination of gelatine, polyvinyl alcohol (PVA), and magnesium chloride (MgCl₂) by solution casting technique. These electrolytes exhibit enhanced amorphous properties confirmed by X-ray diffraction (XRD). The homogeneous surface is confirmed by scanning electron microscopy (SEM), and the elemental composition is confirmed by energy-dispersive X-ray (EDX) spectroscopy. The thermal stability of the biopolymer electrolytes is determined between 0 and 350 °C by thermal gravimetry analysis (TGA). Electrochemical impedance spectroscopy (EIS) confirms the higher ionic conductivity of 4.1 × 10⁻³ S/cm for Gelatine:PVA:MgCl₂ (0.5 g:0.5 g:0.4 g) electrolyte at normal temperature. The cyclic voltammetry (CV) curve reveals the non-faradaic behavior of electrolytes. The specific capacitance records 23.9 F/g at 10 mV/s scan rate and drops to 7.1 F/g at 150 mV/s, a higher scan rate. For the higher conducting material, linear sweep voltammetry (LSV) analysis reveals a potential window of − 1.2 to + 1 V. According to the research, this solid polymer electrolyte may be a good choice for electrochemical devices because of their excellent electrochemical behavior. The objective of this research is to explore the potential of these solid polymer electrolytes for use in electrochemical devices, given their excellent electrochemical behavior. Future work will focus on optimizing the electrolyte composition and further enhancing their electrochemical performance for practical applications in energy storage devices.

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用于储能应用的明胶基新型生物聚合物电解质的电学、电化学和热学特性研究

采用溶液浇铸技术，结合明胶、聚乙烯醇（PVA）和氯化镁（MgCl2）制备出经济环保的天然聚合物电解质。经 X 射线衍射 (XRD) 证实，这些电解质具有增强的无定形特性。扫描电子显微镜（SEM）证实了其均匀的表面，能量色散 X 射线（EDX）光谱证实了其元素组成。热重分析法（TGA）测定了生物聚合物电解质在 0 至 350 °C 之间的热稳定性。电化学阻抗谱（EIS）证实明胶：PVA：氯化镁（0.5 克：0.5 克：0.4 克）电解质在常温下具有较高的离子电导率（4.1 × 10-3 S/cm）。循环伏安（CV）曲线显示了电解质的非法拉第行为。扫描速率为 10 mV/s 时，比电容为 23.9 F/g，扫描速率为 150 mV/s 时，比电容降至 7.1 F/g。对于导电性较高的材料，线性扫描伏安法（LSV）分析显示其电位窗口为 - 1.2 至 + 1 V。研究结果表明，这种固体聚合物电解质具有优异的电化学行为，可能是电化学设备的良好选择。鉴于这些固体聚合物电解质具有出色的电化学性能，本研究的目的是探索它们在电化学设备中的应用潜力。今后的工作重点是优化电解质成分，进一步提高其电化学性能，以便在储能设备中实际应用。

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来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

期刊介绍： Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.