The School of Metallurgy and Materials and the University of Birmingham are part of a successful European H2020 collaborative project Sodium-Ion and sodium Metal BAtteries for efficient and sustainable next-generation energy storage (SIMBA). The main goal of the SIMBA project is the development of a highly cost-effective, safe, all-solid-state-battery with sodium as mobile ionic charge carrier for stationary energy storage applications. Although in many ways SIBs are similar to LIBs, there are still a number of persistent scientific and technical challenges to be addressed. SIMBA aims to solve these challenges and pave the way to market implementation.