氧化锗纳米颗粒对锂离子导电NaCMC/PVA纳米复合膜电导率的影响

IF 3.3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics Pub Date : 2025-09-09 DOI:10.1016/j.ssi.2025.117015

Seshan T.N , Vipin Cyriac , Demappa T , Ismayil

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引用次数: 0

摘要

本研究考察了纳米GeO2对溶液铸造法制备的NaCMC/PVA/ lib基固体聚合物电解质的离子电导率和结构性能的影响。XRD分析表明，随着GeO2含量的增加，非晶态特性增强。FTIR光谱证实了GeO2 NPs与聚合物盐基质之间的相互作用。SEM和EDX分析研究了其形貌和元素组成。紫外可见光谱显示，添加GeO2后，吸收边红移，带隙从5.70 eV减小到5.50 eV。阻抗谱（100 Hz - 5 MHz）表明离子电导率提高，符合Jonscher的通用幂定律，在5 wt%的GeO2下，最大值为（1.13±0.02）× 10−5 S cm−1。LSV确认电化学稳定性高达2.7 V。介电研究表明，由于界面极化，介电常数增加。转移数测量是利用极化技术评价固体聚合物电解质中离子载流子和电子载流子的相对贡献。这些结果突出了geo2分散NaCMC/PVA/LiBr薄膜在储能应用中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Influence of Germanium oxide nanoparticles on the electrical conductivity of Li-ion conducting NaCMC/PVA nanocomposite films

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Influence of Germanium oxide nanoparticles on the electrical conductivity of Li-ion conducting NaCMC/PVA nanocomposite films

This study examines the influence of GeO₂ nanoparticles (NPs) on the ionic conductivity and structural properties of NaCMC/PVA/LiBr-based solid polymer electrolytes synthesized via solution casting technique. XRD analysis revealed enhanced amorphous character with increasing GeO₂ content. FTIR spectra confirmed interactions between GeO₂ NPs and the polymer-salt matrix. SEM and EDX analyses were used to investigate morphology and elemental composition. UV–Vis spectroscopy showed a redshift in absorption edge and a bandgap reduction from 5.70 to 5.50 eV with GeO₂ addition. Impedance spectroscopy (100 Hz - 5 MHz) indicated improved ionic conductivity, following Jonscher's universal power law, with a maximum value of (1.13 ± 0.02) × 10⁻⁵ S cm⁻¹ at 5 wt% GeO₂. LSV confirmed electrochemical stability up to 2.7 V. Dielectric studies revealed an increase in permittivity due to interfacial polarization. Transference number measurement evaluates the relative contributions of ionic and electronic charge carriers in solid polymer electrolytes using polarization technique. These results highlight the potential of GeO₂-dispersed NaCMC/PVA/LiBr films for energy storage applications.

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来源期刊

Solid State Ionics 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.10%

发文量

152

审稿时长

58 days

期刊介绍： This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on: (i) physics and chemistry of defects in solids; (ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering; (iii) ion transport measurements, mechanisms and theory; (iv) solid state electrochemistry; (v) ionically-electronically mixed conducting solids. Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties. Review papers and relevant symposium proceedings are welcome.