Fabrication of free standing nano-SiO2 incorporated solid polymer electrolytes based on poly(vinyl) chloride

IF 2.4 4区化学 Q3 CHEMISTRY, PHYSICAL Ionics Pub Date : 2024-08-27 DOI:10.1007/s11581-024-05787-9

S. Jayanthi, Hemalatha Parangusan, Anandha babu, Sundaresan Balakrishnan, Deepalekshmi Ponnamma

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Abstract

Free standing nanocomposite polymer electrolytes (NCPEs) based on the polymer host poly(vinyl) chloride (PVC) were successfully prepared using the solution casting technique. Lithium nitrate (LiNO₃) and nano-sized silica (SiO₂) (< 100 nm) were employed as the electrolyte and filler, respectively. Impedance studies revealed a maximum ionic conductivity value of 1.226 × 10⁻⁴ S/cm at room temperature for the PVC/LiNO₃ with 5 wt.% nano-SiO₂. X-ray diffraction (XRD) analysis verified the sample’s amorphous nature. Dielectric permittivity and relaxation time values were consistent with impedance results. Additionally, parameters such as diffusion coefficient, mobile concentration, and mobility were evaluated for the prepared samples. Differential scanning calorimetry (DSC) studies confirmed a change in glass transition temperature (T_g) of PVC/LiNO₃/SiO₂ sample. The scanning electron micrograph (SEM) images revealed a honeycomb morphology, indicating ease of Li⁺ ion transportation.

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制造基于聚（乙烯基）氯化物的独立纳米二氧化硅固体聚合物电解质

利用溶液浇铸技术成功制备了基于聚合物主体聚氯乙烯（PVC）的独立纳米复合聚合物电解质（NCPEs）。硝酸锂（LiNO3）和纳米二氧化硅（SiO2）（< 100 nm）分别用作电解质和填料。阻抗研究显示，在室温下，含有 5 wt.% 纳米二氧化硅的 PVC/LiNO3 的最大离子电导率值为 1.226 × 10-4 S/cm。X 射线衍射（XRD）分析证实了样品的无定形性质。介电常数和弛豫时间值与阻抗结果一致。此外，还对制备的样品的扩散系数、流动浓度和迁移率等参数进行了评估。差示扫描量热法（DSC）研究证实 PVC/LiNO3/SiO2 样品的玻璃化转变温度（Tg）发生了变化。扫描电子显微镜（SEM）图像显示出蜂窝状形态，表明 Li+ 离子易于迁移。

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来源期刊

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.