Structural, electrical, and electrochemical investigations on Cu2+ ion–conducting PVA/HPMC-based blend solid polymer electrolytes

IF 2.4 4区 化学 Q3 CHEMISTRY, PHYSICAL
Ionics Pub Date : 2024-09-16 DOI:10.1007/s11581-024-05822-9
Reem Y. Mahmood, Aseel A. Kareem, Anji Reddy Polu, Sun Theo Constan Lotebulo Ndruru
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Abstract

Blend solid polymer electrolytes (BSPEs) comprising PVA/HPMC/CuSO4 were prepared using a solution casting approach. BSPEs were synthesized with varying weight percentages of CuSO4 (0, 10, 20, and 30 wt.%). A variety of experimental methods, including X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and linear sweep voltammetry (LSV), were used to characterize these BSPE systems. The polymer blend matrix underwent structural alterations, according to the XRD data. The standard data from JCPDS card numbers for copper sulfate matches well with the observed strong peaks of PVA/HPMC+20 wt.% of CuSO4 BSPE. The complex that formed within the BSPE systems was detected by FTIR, indicating a positive interaction between the salt and the host polymer. The BSPE containing 20 wt.% CuSO4 exhibited the highest ionic conductivity, reaching 5.11 × 10−3 S/cm at room temperature. Electrochemical stability assessments, conducted using cyclic voltammetry and linear sweep voltammetry, revealed a sufficiently wide electrochemical window for the optimized electrolyte system, confirming its suitability for battery applications.

Abstract Image

基于 PVA/HPMC 的 Cu2+离子导电混合固体聚合物电解质的结构、电学和电化学研究
采用溶液浇铸法制备了由 PVA/HPMC/CuSO4 组成的混合物固体聚合物电解质(BSPE)。在合成 BSPE 时,CuSO4 的重量百分比各不相同(0、10、20 和 30 wt.%)。采用了多种实验方法,包括 X 射线衍射 (XRD)、傅立叶变换红外光谱 (FTIR)、扫描电子显微镜 (SEM)、电化学阻抗光谱 (EIS)、循环伏安法 (CV) 和线性扫描伏安法 (LSV),来表征这些 BSPE 系统。根据 XRD 数据,聚合物共混基质发生了结构变化。根据 JCPDS 卡号得出的硫酸铜标准数据与 PVA/HPMC+20 wt.% CuSO4 BSPE 的强峰值十分吻合。傅立叶变换红外光谱仪检测到了在 BSPE 系统中形成的复合物,这表明盐与主聚合物之间存在正相互作用。含 20 wt.% CuSO4 的双酚 AE 显示出最高的离子电导率,室温下达到 5.11 × 10-3 S/cm。使用循环伏安法和线性扫描伏安法进行的电化学稳定性评估显示,优化后的电解质系统具有足够宽的电化学窗口,这证实了它在电池应用中的适用性。
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来源期刊
Ionics
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.
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