增强钠离子聚合物电解质的离子导电性：碳酸乙烯酯在优化 NaPF6 型 PEO:PVDF-HFP 聚合物电解质中的作用

IF 2.6 4区化学 Q3 POLYMER SCIENCE

Journal of Polymer Research Pub Date : 2025-04-24 DOI:10.1007/s10965-025-04399-9

I S Ravi Varma, Venkata Ramana Jeedi, Kiran Kumar Ganta, Rayudu Katuri, N Kundana, G Upender, Ch Venkata Koti Reddy, V. Suryanarayana, S. Ramesh

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引用次数: 0

摘要

本研究考察了碳酸乙烯（EC）作为增塑剂对掺六氟磷酸钠（NaPF6）的聚环氧乙烷（PEO）和聚偏氟乙烯-共六氟丙烯（PVDF-HFP）聚合物共混电解质的影响。采用溶液铸造技术，合成了不同EC浓度（0-10 wt%）的聚合物电解质膜，并通过XRD、FTIR、DSC、SEM、阻抗谱和介电分析对其进行了表征。主要研究结果表明，8 wt%的EC组分可以最佳地平衡非晶化和结构完整性，在室温下达到1.49 × 10−4 S/cm的最大离子电导率。这种增强是由于结晶度降低，节段运动增加，离子解离改善。形态学研究证实，在最佳EC浓度下，相分离减少，均匀性改善。结构、电学和介电分析强调了8% EC系统优越的离子迁移率、降低的活化能和延长的直流电导率平台，强调了其适用于先进的能源应用。

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Enhanced ionic conductivity in sodium-ion polymer electrolytes: The role of ethylene carbonate in optimizing NaPF6 based PEO:PVDF-HFP polymer electrolytes

This study investigates the impact of ethylene carbonate (EC) as a plasticizer in poly(ethylene oxide) (PEO) and poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) polymer blend electrolytes doped with sodium hexafluorophosphate (NaPF₆). Using solution casting technique, polymer electrolyte membranes with varying EC concentrations (0–10 wt%) were synthesized and characterized through XRD, FTIR, DSC, SEM, impedance spectroscopy, and dielectric analysis. Key findings reveal that an 8 wt% EC composition optimally balances amorphization and structural integrity, achieving a maximum ionic conductivity of 1.49 × 10⁻⁴ S/cm at room temperature. This enhancement is attributed to reduced crystallinity, increased segmental motion, and improved ion dissociation. Morphological studies confirm reduced phase separation and improved homogeneity at the optimal EC concentration. structural and electric and dielectric analyses highlight the superior ionic mobility, reduced activation energy, and extended DC conductivity plateau for the 8% EC system, underscoring its suitability for advanced energy applications.

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来源期刊

Journal of Polymer Research 化学-高分子科学

CiteScore

4.70

自引率

7.10%

发文量

472

审稿时长

3.6 months

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.