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Preparation and characterization of nano Dy2O3 doped polyvinyl alcohol   +   na3c6h5o7 polymer electrolyte membrane for battery

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Document pages: 9 pages

Abstract: Composite polymer electrolyte membranes containing different concentrations of nano Dy2O3 (1.0-4.0 ) in PVA were synthesized by solution casting method, and characterized by FTIR, XRD, SEM and DSC. The results show that all components are evenly dispersed. The films containing 3 nano Dy2O3 are more uniform and have lower crystallinity, which is also supported by DSC studies, indicating their friendly properties to ionic conductivity. The migration number study shows that the main carrier is ion. With the increase of nano Dy2O3 content, the conductivity of the film increases and reaches the maximum in 3 of the film, which is 1.06   ×   10 − 4.   s cm (at 303)   K). In addition, the conductivity of the film increases with the increase of temperature, which is due to the jump of O interchain and intrachain ion movements and fall in microscopic viscosity at the matrix interface of the film. Electrochemical cells are fabricated using these films with the configuration “anode (Mg + MgSO4) [PVA (90 ) + Na3C6H5O7 (10 ) + (1–4 nano-Dy2O3)] cathode (I2 + C + electrolyte),” and various discharge characteristics are evaluated. With 3 nano-Dy2O3 film, the maximum discharge time of 118 hrs with open-circuit voltage of 2.68 V, power density of 0.91 W kg, and energy density of 107.5 Wh kg are observed. These findings reflect the successful adoption of the developed polymer electrolyte films in electrochemical cells.

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