Silica nanoparticles impact on sodium ion conducting PEO-PVDF electrolyte: Electrical, dielectric response and ion transport properties

IF 5.9 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Physics and Chemistry of Solids Pub Date : 2026-05-01 Epub Date: 2026-01-08 DOI:10.1016/j.jpcs.2026.113529

Venkata Ramana Jeedi , Kiran Kumar Ganta , Mechiri Sandeep Kumar , Nagam Keerthana , Shikari Pallavi , Nandam Hanusritha , Sameera Kokkiligadda , Rayudu Katuri

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Abstract

Solution casting method was used to prepare SiO₂ nanocomposite polymer electrolytes with poly-ethylene oxide, poly-vinylidene fluoride and NaClO₄ salt. Different weight percentages of SiO₂ was dispersed to optimize the ionic conductivity. Characterizations were carried out to analyze the average particle size, surface morphology, and functional groups respectively. Electric modulus, dielectric, and electrical response were investigated using impedance analyser. Wagner's polarization method was emphasized and the best ion transport number was observed for 3 wt% SiO₂. Impedance spectroscopy was utilized to study the electrical and dielectric response. Ion concentration, diffusion coefficient & mobility of target samples were calculated. Incorporating the silica nanoparticles led to a significant improvement in ionic conductivity and maximum (0.1496 x 10 ⁻³ S/cm) was observed. The frequency independent conductivity has been seen up to 10⁵ Hz with addition of nanoparticles. The rise in conductivity and increase in plateau of frequency independence by the nanofiller could be due to creation of new ion conducting free paths and increased amorphous nature confirmed by XRD and SEM analysis.

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二氧化硅纳米颗粒对钠离子导电PEO-PVDF电解质的影响：电学、介电响应和离子输运性质

采用溶液浇铸法制备了聚环氧乙烷、聚偏氟乙烯和氯化钠盐组成的SiO2纳米复合聚合物电解质。分散不同重量百分比的SiO2以优化离子电导率。表征分别分析了平均粒径、表面形貌和官能团。利用阻抗分析仪对电模量、介电和电响应进行了研究。强调了Wagner极化法，在SiO2浓度为3wt %时观察到最佳离子输运数。阻抗谱用于研究电和介电响应。计算了目标样品的离子浓度、扩散系数和迁移率。加入二氧化硅纳米颗粒导致离子电导率显著提高，并观察到最大（0.1496 x 10−3 S/cm）。与频率无关的电导率在加入纳米粒子后高达105 Hz。通过XRD和SEM分析证实，纳米填料的电导率和频率无关平台的增加可能是由于产生了新的离子导电自由路径和增加的非晶性质。

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来源期刊

Journal of Physics and Chemistry of Solids 工程技术-化学综合

CiteScore

7.80

自引率

2.50%

发文量

605

审稿时长

40 days

期刊介绍： The Journal of Physics and Chemistry of Solids is a well-established international medium for publication of archival research in condensed matter and materials sciences. Areas of interest broadly include experimental and theoretical research on electronic, magnetic, spectroscopic and structural properties as well as the statistical mechanics and thermodynamics of materials. The focus is on gaining physical and chemical insight into the properties and potential applications of condensed matter systems. Within the broad scope of the journal, beyond regular contributions, the editors have identified submissions in the following areas of physics and chemistry of solids to be of special current interest to the journal: Low-dimensional systems Exotic states of quantum electron matter including topological phases Energy conversion and storage Interfaces, nanoparticles and catalysts.