YSZ thin film nanostructured battery for on-chip energy storage applications. (April 2020)

• Record Type: Journal Article
• Authors: Lizarraga, Eder; Read, John; Solorio, Fernando; Torres, Gerson; Vazquez, Jorge; Murillo, Eduardo; Soto, Gerardo; Tiznado, Hugo
• Is Part Of: Journal of energy storage. Volume 28(2020)
• Publication Date: 2020-04
• Subjects: YSZ -- Thin films -- Solid state -- Energy storage -- Battery -- On-chip power -- Transition metal electrodes; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2020.101220
• Languages: English
• ISSNs: 2352-152X

Abstract

Highlights: YSZ films used as electrolyte in solid state storage device. Ultrathin YSZ (< 50 nm) was deposited by atomic layer deposition on transition metal/oxides electrodes. The discharge behavior is similar to those of batteries. Energy storage depends on the operation temperature. Abstract: Thin film solid-state batteries stand out as desired components to produce on-chip energy storage, sometimes known as 'power on a chip'. Multilayer structures have been tried for this purpose. The characteristics of both electrodes and the solid electrolyte require careful choice to meet this need. In this paper, we propose a thin-film battery using zirconia stabilized with yttria as the electrode separator and transition metal/oxides — here ruthenium oxide and gold — as electrodes. We show promising results, given that the objectives of merit (stored energy and energy density) compete with other cutting-edge thin film energy storage devices. While optimistic about the possibility of producing a usable battery, several technical problems remain to be solved. One of them is the operating temperature: in our prototype the peak performance is at 175°C. We conclude that YSZ is able to fulfill the electrolytic task, since its ionic conduction, with a thickness of 50 nm, allows the oxidation-reduction reactions to be carried out in the ruthenium oxide layer; in this thickness their parasitic currents can be kept low. Graphical abstract: Image, graphical abstract