Abstract: A method for producing a Barium Titanate layer, the method includes: receiving or preparing an aqueous solution that comprises water and Barium Titanate; wherein the aqueous solution is characterized by a high positive zeta potential, low conductivity and a high pH value; electrophoretically depositing Barium Titanate from the aqueous solution on a base metal cathode while substantially preventing oxidation of the base metal cathode; drying the deposited Barium Titanate; and sintering the deposited Barium Titanate while substantially preventing the oxidation of the base metal cathode.

Abstract: A double-electrolyte fuel-cell is presented for generating electrical energy from chemical fuel. The fuel-cell includes an anode, a cathode as well as both an anion-conducting electrolyte and a cation-conducting electrolyte. A fuel-cell stack is also presented consisting of a plurality of double-electrolyte fuel-cells.

Abstract: An acoustic detector is described for detecting acoustic waves in a medium that can be a relatively dense medium. The detector comprises a concentrating structure provided with a lens-shaped cavity and an acoustic lens made of a dense fluid received within the cavity. A sensor is positioned at an acoustic focus distance from the acoustic lens. Sound waves propagating within the medium towards the acoustic detector are captured by the acoustic lens, concentrated through the concentrating structure, and are collected by the sensor. The acoustic detector can be applied to a vast variety of applications.