Scholarlink

<p>In this work, biodegradable solid polymer electrolytes (BSPEs) were developed using a blend of sodium alginate (SA) and polyvinyl alcohol (PVA), integrated with magnesium acetate tetrahydrate (Mg(CH<sub>3</sub>COO)<sub>2</sub>.4H<sub>2</sub>O) and glycerol. The formulations were systematically optimized for ionic conductivity and mechanical flexibility by stirring the mixture for 8&#xa0;h, followed by solution casting at 60&#xa0;°C and vacuum drying. Different quantities of PVA, Mg (CH<sub>3</sub>COO)<sub>2</sub>.4H<sub>2</sub>O, and glycerol were tested across five levels each. The optimal composition 0.25&#xa0;g Mg(CH<sub>3</sub>COO)<sub>2</sub>.4H<sub>2</sub>O, 0.15&#xa0;g PVA, 0.06&#xa0;g SA, and 0.05&#xa0;g glycerol exhibited the highest ionic conductivity and flexibility. Electrochemical Impedance Spectroscopy (EIS) measurements showed an ionic conductivity of 9.82 × 10⁻<sup>4</sup> S cm⁻<sup>1</sup>, while Linear Sweep Voltammetry (LSV) revealed an electrochemical stability window of 2.47&#xa0;V. DC polarization studies indicated a total ionic transference number (<i>t</i><sub>ion</sub>) of 0.98, with a cationic contribution (<i>t</i>⁺) of 0.32. Fourier Transform Infrared Spectroscopy (FTIR) analysis confirmed effective interactions among PVA, SA, and Mg (CH<sub>3</sub>COO)<sub>2</sub>.4H<sub>2</sub>O, and X-ray Diffraction (XRD) patterns suggested an increased amorphous character in the polymer matrix. Thermal behavior, evaluated by Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA), showed a glass transition temperature (<i>T</i><sub>g</sub>) of 32&#xa0;°C and moderate thermal stability. Scanning Electron Microscope (SEM) imaging demonstrated uniform distribution of granules, consistent with enhanced Mg<sup>2</sup>⁺ ion density. Overall, the SA-PVA-Mg (CH<sub>3</sub>COO)<sub>2</sub>.4H<sub>2</sub>O-glycerol system represents a promising magnesium-ion-conducting BSPE with excellent electrochemical properties.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Development and comprehensive characterization of a novel biodegradable sodium alginate–PVA blend solid polymer electrolyte for Mg-ion conduction

  • 期刊论文

  • 发表日期：

    2026年1月9日

查看全文
  • H. P. U. Kalhara,
  • H. N. M. Sarangika,
  • Kaveenga R. Koswattage,
  • Niroshan Gunawardana,
  • Nanditha Rajapaksha,
  • Nadeesha P. W. Rathuwadu

摘要

In this work, biodegradable solid polymer electrolytes (BSPEs) were developed using a blend of sodium alginate (SA) and polyvinyl alcohol (PVA), integrated with magnesium acetate tetrahydrate (Mg(CH3COO)2.4H2O) and glycerol. The formulations were systematically optimized for ionic conductivity and mechanical flexibility by stirring the mixture for 8 h, followed by solution casting at 60 °C and vacuum drying. Different quantities of PVA, Mg (CH3COO)2.4H2O, and glycerol were tested across five levels each. The optimal composition 0.25 g Mg(CH3COO)2.4H2O, 0.15 g PVA, 0.06 g SA, and 0.05 g glycerol exhibited the highest ionic conductivity and flexibility. Electrochemical Impedance Spectroscopy (EIS) measurements showed an ionic conductivity of 9.82 × 10⁻4 S cm⁻1, while Linear Sweep Voltammetry (LSV) revealed an electrochemical stability window of 2.47 V. DC polarization studies indicated a total ionic transference number (tion) of 0.98, with a cationic contribution (t⁺) of 0.32. Fourier Transform Infrared Spectroscopy (FTIR) analysis confirmed effective interactions among PVA, SA, and Mg (CH3COO)2.4H2O, and X-ray Diffraction (XRD) patterns suggested an increased amorphous character in the polymer matrix. Thermal behavior, evaluated by Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA), showed a glass transition temperature (Tg) of 32 °C and moderate thermal stability. Scanning Electron Microscope (SEM) imaging demonstrated uniform distribution of granules, consistent with enhanced Mg2⁺ ion density. Overall, the SA-PVA-Mg (CH3COO)2.4H2O-glycerol system represents a promising magnesium-ion-conducting BSPE with excellent electrochemical properties.