Tiwari Anurag, Kumar Singh Rajendra
Ionic Liquid and Solid-State Ionics Lab, Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
Chemphyschem. 2024 Dec 16;25(24):e202400620. doi: 10.1002/cphc.202400620. Epub 2024 Oct 30.
The integration of the flexibility of organic polymer electrolyte and high ionic conductivity of the ceramic electrolyte is attempted in search of efficient and safer battery. Composite solid polymer electrolyte (CSPE) provides high ionic conductivity with a sustainable thin film of electrolyte having the synergistic effect of ionic liquid and active inorganic filler. The CSPE is synthesized by the solution cast technique using NaZrSiPO (NZSP) as ceramic and poly(vinylidene fluoride-hexafluoropropylene) with Salt-Ionic liquid as polymer electrolyte. X-ray diffraction (XRD) of CSPE includes amorphous nature due to the polymer part as well as crystalline peaks of ceramic NZSP, simultaneously. The prepared CSPE sample shows homogeneous and interconnected surface morphology is observed by Scanning electron microscopy (SEM) image. Thermogravimetric analysis (TGA) shows electrolyte is thermally stable up to 200 °C and differential scanning calorimetry (DSC) reveals decrease in degree of crystallinity due to NZSP addition in the CSPE. By complex impedance spectroscopy (CIS), room temperature ionic conductivity of the prepared CSPE is found ~1.03 mS/cm. The dielectric behaviour of the prepared electrolyte is also studied to investigate the ion dynamics within the sample. The cationic transference number is 0.53 and the electrochemical stability window (ESW) of the CSPE is 4.9 V which is suitable for sodium solid-state batteries applications.
为了寻找高效且更安全的电池，人们尝试将有机聚合物电解质的柔韧性与陶瓷电解质的高离子电导率相结合。复合固体聚合物电解质（CSPE）通过具有离子液体和活性无机填料协同效应的可持续电解质薄膜提供高离子电导率。CSPE是通过溶液浇铸技术合成的，使用NaZrSiPO（NZSP）作为陶瓷，聚（偏二氟乙烯-六氟丙烯）与盐-离子液体作为聚合物电解质。CSPE的X射线衍射（XRD）同时包括由于聚合物部分导致的非晶性质以及陶瓷NZSP的结晶峰。通过扫描电子显微镜（SEM）图像观察到所制备的CSPE样品呈现出均匀且相互连接的表面形态。热重分析（TGA）表明电解质在高达200°C时具有热稳定性，差示扫描量热法（DSC）显示由于在CSPE中添加了NZSP，结晶度降低。通过复阻抗谱（CIS），发现所制备的CSPE的室温离子电导率约为1.03 mS/cm。还研究了所制备电解质的介电行为，以研究样品内的离子动力学。阳离子迁移数为0.53，CSPE的电化学稳定窗口（ESW）为4.9 V，适用于钠固态电池应用。
