Design of Novel Hybrid and Solid State Battery Materials and Cell Prototypes

Next generation energy storage devices benefit from fast and solid Li+ ceramic electrolyte conductors, which allow for safe and efficient batteries and fast data calculation. For those applications, the ability of Li-oxides to be processed as thin film structures and with high control over Lithiation and phases at low temperature is of essence to control conductivity. Through this presentation we review the field from a new angle, focused not only on the classics, such as Li-ionic transport and electrochemical stability window for Li-solid state battery electrolytes, but also on opportunities and challenges in thermal and ceramic processing of the components and their assemblies with electrodes. Oxide vs. Sulfide based solid state battery materials and designs will be reflected on, and we will review and give perspectives on the role of solid-state battery ceramic strategies for the electrolyte on the electrode interfaces and towards charge transfer vs. current densities. We will disclose a new 'sequential deposition synthesis' to offer a low budget alternative with high stoichiometric control for battery solid electrolyte manufacture that extends prior ceramic classic synthesis routes and show first cell data from a collaboration with Samsung. In the second part, we will study a new class of 'high entropy' Li amorphous conductors based on Li-garnets that have so far the highest known number of local bonding units, and discuss these structure types towards other ‘low entropy’ glassy Li-conductor phases. Strategies can be proposed for the network modifier, opening up a new class of Li conductors that has a wide access range to stabilise the various high entropy phases and process these at relatively low temperatures for future electrolyte or protective coatings for hybrid and solid state batteries operating with lithium for high energy density.