Ag+-ion conducting Nano-Composite Polymer Electrolytes (NCPEs): Synthesis, characterization and all-solid-battery studies

• Published in: Journal of non-crystalline solids Vol. 391; pp. 91 - 95
• Main Authors: Ashrafi, Rehana, Sahu, Dinesh K., Kesharwani, Priyanka, Ganjir, Manju, Agrawal, R.C.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier B.V 01-05-2014; Elsevier
• Subjects: All-Solid-State battery; Applied sciences; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Diffusion in solids; Electrical, magnetic and optical properties; Exact sciences and technology; Hot-press film casting; Ionic conductivity; Ionic/cationic transference number; Materials science; Nano Composite Polymer Electrolytes (NCPEs); Nanopowders; Nanoscale materials and structures: fabrication and characterization; Organic polymers; Physicochemistry of polymers; Physics; Properties and characterization; Self-diffusion and ionic conduction in nonmetals; Theory of diffusion and ionic conduction in solids; Transport properties of condensed matter (nonelectronic); Nano Composite Polymer Electrolytes (NCPEs); Ionic/cationic transference number; All-Solid-State battery; Hot-press film casting; Ionic conductivity; Particle size; Fourier transform spectroscopy; Electrical conductivity; Transport properties; Filler material; XRD; Flexibility; Thin films; Nanoparticles; Temperature effects; Battery; Drain current; Arrhenius equation; Fourier-transformed infrared spectrometry; Least square fit; Activation energy; Temperature dependence; Polymer electrolytes; Fillers; Polymer films; Organic polymers; Lattice parameters; Conducting polymers; Casting; Solid state; Hot pressing; Quantity ratio; Composite materials; Electrical conductivity measurement; Solid electrolytes; Transport processes; Anodes; Nanostructured materials; Cathodes
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2014.03.013

Ag+-ion conducting Nano Composite Polymer Electrolyte (NCPE) films: [90PEO: 10AgCF3SO3]+xAl2O3, where x=0.5, 1, 1.5, 2, 3, 4, 5wt.(%), have been prepared by a completely dry hot-press technique in place of the traditional solution-cast method. NCPE film, basically a two-phase organic composite polymer electrolyte, has been synthesized using Solid Polymer Electrolyte (SPE) composition: [90PEO: 10AgCF3SO3], identified as one of the high conducting films with room temperature (300K) ionic conductivity (σrt)~7.12×10−7S/cm and having superior mechanical flexibility, as 1st-phase host and nano-particles (size<50nm) of an insulating/inert filler material Al2O3 as 2nd-phase dispersoid. Filler particle concentration dependent conductivity measurements revealed NCPE film: [(90PEO: 10AgCF3SO3)+3Al2O3] as Optimum Conducting Composition (OCC) with σrt~2.57×10−6S/cm. A conductivity enhancement of more than 3-fold could be achieved in SPE as a consequence of dispersal of Al2O3 nano-particles. Also, NCPE OCC film physically appeared relatively more stable/flexible as compared to SPE host film. The characterization of ion transport properties in SPE host and NCPE OCC films has been done in terms of ionic conductivity (σ) and total ionic (tion)/cation (t+) transference numbers. These ionic parameters have been evaluated experimentally using different ac/dc techniques. The temperature dependent conductivity has also been studied and the activation energy (Ea) was computed by liner least square fitting of Arrhenius plot. The material characterization was done by analyzing X-ray Diffraction (XRD) and Fourier Transform Infrared (FTIR) responses on the film samples. All-Solid-State batteries in the cell configuration Ag (anode)//NCPE OCC film//(I2+C+NCPE) (cathode) have been fabricated and the cell-potential discharge performances have been studied under varying load conditions. An Open Circuit Voltage (OCV)~0.56V was obtained. Some important cell parameters have been evaluated from the cell potential discharge profiles. The battery performed quite satisfactorily especially under low current drain states.
•Hot-press casting of Ag+-ion conducting dry polymer electrolyte (viz. SPE, NCPE) films•More than 3-fold increase in σrt of NCPE film: A consequence of nano filler particle dispersal in SPE•Salt complexation/nano-filler dispersal (in SPE/NCPE): Confirmed by XRD/FTIR•Cell potential of All-Solid-State battery based on NCPE remained stable for more than 50h.