Modulation of ion dynamics and electrical dielectric characteristics in MC:NaF polymer electrolytes through glycerol incorporation

IF 2.6 4区化学 Q3 CHEMISTRY, PHYSICAL

Ionics Pub Date : 2025-07-22 DOI:10.1007/s11581-025-06546-0

Shujahadeen Bakr Aziz, Abubakr Wsu Muhammed, Sleman Yousif Omar, Dlshad Aziz Hamid, Ibrahim Luqman Salih, Peshawa H. Mahmood, Hazhar Hamad Rasul, Karukh Ali Babakr, Ibrahim Nazem Qader, Pshdar Ahmed Ibrahim, Safar Saeed Mohammed, Rebaz Anwar Omer, Ari Ahmed Abdalrahman, Samir Mustafa Hamad, Peyman Aspoukeh, Sarbast Mamnd Hussein

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引用次数: 0

Abstract

Polymer electrolytes are essential for advanced applications, particularly in the battery industry, due to their high ionic conductivity and improved material properties. This study enhances the ionic conductivity of a methylcellulose (MC) polymer matrix by incorporating glycerol as a plasticizer at varying concentrations (0, 9, 18, 27, and 36 wt.%). Films were prepared using the casting method with 13% sodium fluoride (NaF), resulting in transparent and flexible films. Characterization was performed using X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, and electrochemical impedance spectroscopy (EIS). FTIR analysis showed that increasing glycerol concentrations strengthened hydrogen bonding interactions, which facilitated greater ionic dissociation. XRD results revealed a reduction in bell-shaped peaks, indicating increased segmental freedom of the polymer chains. This structural change created better pathways for cation and anion migration. EIS analysis confirmed a significant improvement in ionic conductivity with glycerol addition. The sample containing 36 wt.% glycerol exhibited the highest conductivity. This enhancement resulted from increased ion dissociation, greater segmental motion of the polymer chains, and reduced polymer rigidity due to glycerol’s plasticizing effect. Dielectric studies further supported these findings. Higher dielectric constants and reduced dielectric loss indicated stronger ionic polarization and enhanced transport mechanisms. These results demonstrate the potential of glycerol-incorporated polymer electrolytes for energy storage applications, contributing to the development of efficient and reliable battery technologies.

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甘油掺入对MC:NaF聚合物电解质中离子动力学和电介质特性的调制

聚合物电解质由于其高离子导电性和改进的材料性能，对于先进的应用，特别是在电池工业中是必不可少的。本研究通过加入不同浓度的甘油作为增塑剂（0%、9%、18%、27%和36% wt.%）来增强甲基纤维素（MC）聚合物基质的离子电导率。采用13%氟化钠（NaF）浇铸法制备薄膜，得到透明柔韧的薄膜。采用x射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和电化学阻抗谱（EIS）进行表征。FTIR分析表明，甘油浓度的增加增强了氢键相互作用，促进了更大的离子解离。XRD结果显示钟形峰减少，表明聚合物链的节段自由度增加。这种结构变化为正离子和阴离子的迁移创造了更好的途径。EIS分析证实，加入甘油后，离子电导率显著提高。含有36wt .%甘油的样品电导率最高。这种增强是由于离子解离增加，聚合物链的节段运动增加，甘油的塑化作用降低了聚合物的刚性。电介质研究进一步支持了这些发现。较高的介电常数和较低的介电损耗表明离子极化和输运机制增强。这些结果证明了甘油聚合物电解质在储能应用中的潜力，有助于开发高效可靠的电池技术。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.