Periodic Reporting for period 1 - MASSIF (Modifying All Solid State Lithium Battery Interfaces)
Berichtszeitraum: 2022-01-17 bis 2024-01-16
The "Modifying All Solid State Lithium Battery Interface" MSCA project focused on the optimization of the interface between the developed Li2S positive electrode and Li7La3Zr2O12 (LLZO) ceramic solid electrolyte by modifying the surface of ceramic solid electrolyte with organic solid layer. The project contains three main objectives: the identification of the reactions at the interface between positive and ceramic solid electrolytes to design the organic solid layer able to improve the compatibility properties, the design of the solid interface via manufacturing hybrid solid electrolyte, and the validation of the Li2S/modified solid interface/LLZO/Si full cell. The originality and innovation of this project are the development of an alternative Li2S positive electrode and the enhancement of the interfacial properties via modifying the LLZO surface by manufacturing a hybrid (organic-inorganic) solid electrolyte. Moreover, advanced techniques were used to characterize the electrode-organic-inorganic interfaces. The synthesized positive electrode allows the development of Li-S battery, which is a technology with a high theoretical energy density of 2600 WhKg-1, which can be implemented as energy storage devices in several applications.
The obtained results and milestones are:
-M01: Successful synthesis of Li2S positive electrode for all-solid-state lithium batteries
-M02: Manufacturing LLZO through ball milling method to be used as a ceramic solid electrolyte for all-solid-state lithium batteries
-M03: Assemble half cells using the developed Li2S positive electrode material and LLZO solid electrolyte vs. Li metal.
The results were disseminated in two main conferences, i.e. European Conference on Renewable Energy System (2023), and 243th ECS.
-M01: Successful synthesis of Li2S positive electrode for all-solid-state lithium batteries
-M02: Manufacturing LLZO through ball milling method to be used as a ceramic solid electrolyte for all-solid-state lithium batteries
-M03: Assemble half cells using the developed Li2S positive electrode material and LLZO solid electrolyte vs. Li metal.
The results were disseminated in two main conferences, i.e. European Conference on Renewable Energy System (2023), and 243th ECS.
The demands for advanced energy storage devices have dramatically increased during the past years. They are fostered by a variety of different needs in multiple grids and off-grid technologies. Today, lithium-ion batteries (LIBs) serve as power sources in portable electronics, power tools, and electric base transportation. They are also ready to take over other niche and mainstream applications, e.g. wearable to smart grid support and electric vehicles. Although LIBs are the critical enabler of the current success of mobile devices, they are quickly becoming one of the major bottlenecks. The battery technology has been unable to keep pace. The next battery generation requires a combination of high energy and power densities, longer cycling life, and reduced costs. To fulfill this necessity, new materials are needed to develop. For example the proposed Li2S cathode material, which means not metallic Li will be needed as anode and would allow the use of conversion electrodes, i.e. Si, improving the safety of the device, which is crucial for several applications. In addition, the manufactured Li2S positive electrode has a much higher melting point (1372 °C) than the conventional S (115 °C), guaranteeing its use in high-temperature applications.