Preparation, characterization and conductivity studies of a Nasicon system Ag_3–2xTa_x Al_2–x (PO₄)₃ (x = 0.6–1.4)

Abstract

Rhombohedral Nasicon type materials of composition Ag3–2x Tax Al2–x (PO4)3 (x = 0.6, 0.7,0.8, 0.9, 1.0, 1.1,1.2, 1.3 and 1.4) have been prepared and characterized by powder XRD and IR. All these compositions are found to be isomorphous with NbTiP3O12, lithium and sodium analogues of same Nasicon framework. The unit cell parameters were derived from powder XRD. All the compounds show characteristic PO4 vibrational bands. DC conductivity measurements were carried out in the temperature range 300–650 K. The activation energies for conduction were deduced from the Arrhenius plots and are in the range 0.42–0.71 eV. Among the series investigated, Ag0.8Ta1.1Al0.9P3O12 exhibits the highest conductivity, σ ≈ 5.01 × 10–3 S cm–1 at 350 °C (Ea = 0.55 eV). (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Single‐phase All‐solid‐state Silver Battery using Ag1.5Cr0.5Ti1.5(PO4)3 as Anode, Cathode, and Electrolyte

“…[20][21][22][23][24] Other types of silver battery materials with a wide potential window are necessary to construct a high voltage cell. Some of the NASICON-type silver-ion conductors exhibit high silver-ion conductivity [25][26][27][28] and are expected to exhibit even wider potential windows than AgI. Herein, we report a single-phase all-solid-state silver battery using Ag 1.5 Cr 0.5 Ti 1.5 (PO 4 ) 3 as the cathode, anode, and electrolyte.…”