Thangadurai, VenkataramanBristi, Afshana Afroj2023-01-122023-01-122023-01-05Bristi, A. A. (2023). Development of poly (vinylidene fluoride) and poly(vinyl pyrrolidone) based solid polymer electrolyte for the next generation of solid-state sodium ion battery (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.http://hdl.handle.net/1880/115667https://dx.doi.org/10.11575/PRISM/40589Solid-state sodium-ion batteries (ss-SIBs) are a promising alternative to commercially available lithium-ion batteries for next-generation energy storage applications due to the abundance and cost-effectiveness of sodium over lithium. Good electrochemical, mechanical, electrode compatibility, interfacial, and thermal stability properties of the solid form of electrolytes are considered as prerequisites to develop ss-SIBs. Among the organic and inorganic solid electrolytes, solid polymer electrolytes (SPE) are being considered as the promising ones based on the versatility of polymer materials and their potential optimization scope. However, low ionic conductivity and high interfacial resistance are the key drawbacks of typical SPEs. In this thesis, using a facile solution casting fabrication process, a high sodium-ion conductive, filler-less composite solid polymer electrolyte (SPE) film based on poly (vinylidene fluoride) polymer, poly (vinyl pyrrolidone) (PVP) binder, and NaPF6 salt has been studied for ss-SIB. A systematic characterization was carried out to investigate the microstructure and electrochemical properties of PVDF and PVP based SPEs via electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), and Raman spectroscopy techniques. Total conductivities of 8.51 × 10–4 and 8.36 × 10–3 S cm–1 at 23 and 83 °C, respectively, were observed from the developed SPE. Obtained low activation energy (Ea) value suggests that in the composite polymer matrix Na-ion can easily be diffused. Identified β- and γ-phases of the PVDF polymer in the composite SPE matrix indicates the polar nature of the host polymer, which is believed to play an important role in decreasing the crystallinity as well as enhancing the Na+ conductivity. A hybrid symmetric half-cell assembly using Na electrode, 1 M NaClO4 in ethylene carbonate (EC) and propylene carbonate (PC) (EC/PC = 1:1 wt. %) and with SPE showed excellent Na plating–stripping performance at 10 mA cm–2 at 23 °C. A hybrid full cell with a SPE, a Na anode, and a Na3V2(PO4)3 cathode were assembled in a coin cell and electrochemical performance was evaluated.engUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.Education--PhysicalEnergymaster thesis