Solid Oxide Electrochemical Devices: as the CNR -ITAE is moving these technological concepts towards new applications

Currently, society is assisting in transitioning from centralized power generation to distributed power generation [1, 2]. This transition is necessary for various reasons that essentially reside on some fundamental points: 1.The current electric lines can not withstand the energy demand of an increasing number of energy-intensive vehicles, especially for mobility [3]. 2.The ever-increasing availability of small electric generators has created many small electricity producers, and on-site use becomes more advantageous [4]. 3.Technologies concerning electrochemical devices for the production and use of energy are particularly efficient for small sizes [5]. In this scenario, the development of energy conversion devices such as solid oxide fuel cells (SOFC) and devices for the storage of electricity such as solid oxide electrolysis cells (SOEC) and metal-air solid oxide batteries can play a crucial role [6, 7]. Solid oxide cells (SOC) are electrochemical devices capable of converting chemical energy into electrical energy when used as SOFCs and vice versa when operated as SOECs. A similar cell can also be used as cell batteries, allowing electricity storage, depending on the grid demand. The current problem is that such devices cannot be considered sufficiently mature because not enough time has passed from their conceptualization to their demonstration for real uses. Therefore, we are assisting to a proliferation of concepts that simulate their perspectives in a suitable environment. Based on these considerations, this communication reports the ideas and prototypes adopted by our research group to improve the flexibility in the use of fuels (SOFC), the convenience of direct methane production through commercial SOEC cells and the realization of a simple and cheep architecture of metal-air battery.