This talk will broadly focus on designing and investigating main-group and/or transition-metal based redox-active molecules, targeted for use in fundamentally new bond activation chemistry and energy applications. The first part will focus on the design of redox-active metal complexes bearing redox non-innocent ligands for use in either chemical or electrochemical energy storage applications. Here, the talk will mostly center on the design of new charge carriers for solution and slurry-based redox-flow battery applications for grid-scale energy storage.