Solid electrolyte

Recent progress in the development of a ß-alumina gas sensor for automotive applications is reported. The sensing device consists of two solid electrolytes (namely a thin film of sodium sulfate deposited on ß-alumina by appropriate treatment in a gaseous atmosphere), with two electrodes having different catalytic properties, one made of platinum, the other of gold. The ß-alumina component was prepared

Lithium (Li) metal can be degraded by factors such as irregular Li stripping, Li dendritic growth, and the growth of a solid electrolyte interphase (SEI) layer, finally leading to the performance deterioration of Li-air batteries. In particular, the operation of the Li-air battery in ambient air remains a considerable challenge due to the possible occurrence of parasitic reactions on Li metal with moisture and other contaminants diffusing from the outside air. In this work, a protected Li electrode (PLE) composed of Li metal covered with a bilayer lithium phosphorous oxynitride (LiPON)/aluminium substituted lithium lanthanum titanate (A-LLTO) solid electrolyte was suggested. The mechanism for the degradation of Li electrodes with and without the LiPON/A-LLTO protection layer was compared using the Li symmetric cell and Li-air cell by investigating the electrochemical performance of cells and the growth of Li dendrites. The Li symmetric cell employing the LiPON/A-LLTO exhibited superior cyclability to the cell without the solid electrolyte due to the effective suppression of Li dendritic growth. Further, the aprotic Li-air cell employing the PLE showed outstanding electrochemical performance when operated in pure oxygen and even in an air atmosphere: a long life span of 128 cycles in oxygen atmosphere and 20 cycles in air atmosphere under the limited capacity mode of 1000 mA h g À1. The obtained excellent performance of the Li-air cell employing the PLE is attributed to the effective suppression of the Li dendrite growth and electrolyte decomposition with the presence of LiPON/A-LLTO. In addition, dense LiPON/A-LLTO completely protected the Li metal electrode from the penetration of oxygen, moisture, and other contaminants which can degrade the Li metal electrode.

Oxygen ion conducting solid electrolyte thin film of BIMEVOX family Bi2Co0.1V0.9O5.35 was synthesized by an innovative and cost effective spray pyrolysis technique on alumina substrate. The uniformity in deposition is obtained by propane-2ol assisted atomization. Thermal decomposition behavior of precursors was studied using thermogravimetric analysis (TGA and DTA). The room temperature stabilized pure γ-phase Bi2Co0.1V0.9O5.35 was obtained by annealing films

Tungsten trioxide (WO3) thin films with Pt and Cu electrodes are characterized regarding the suitability for nonvolatile memory applications. Cells down to 70 �? 70 nm2 are fabricated by a combination of e-beam and nanoimprint lithography. The electrical measurements reveal good properties with switching currents of only 500 nA, fast SET and RESET switching down to 5 ns and retention

Two different cell chemistries, Gen 1 and Gen 2, were subjected to accelerated aging experiments. In Gen 1 calendar life experiments, useful cell life was strongly affected by temperature and time. Higher temperature accelerated cell performance degradation. The rates of impedance increase and power fade followed simple laws based on a power of time and Arrhenius kinetics. The data have

Precursors of thin films were deposited on alumina substrates at temperature of 250°C using spray pyrolysis technique and BICUVOX phase obtained after annealing at 650°C. Thermal decomposition behavior of BICUVOX precursor was studied using TGA–DTA technique. It reveals that formation of oxide phase takes place beyond 630°C. X-ray diffraction and SEM techniques were employed for structural and surface morphological characterizations,