EXC 3120 BlueMat - Research Topic D2: All-Water Redox Batteries

D2 focuses on pioneering new battery solutions using water-based electrolytes and elucidating the critical interactions between water and aqueous electrolyte components at electrified interfaces. We will investigate the interactions between novel electrode materials and water within the context of battery technology. Our approach integrates advanced in-situ and in-operando characterization of material interfaces with modeling to bridge theoretical predictions and experimental observations. Such batteries use zinc metal anodes and cathodes with materials capable of intercalating anions. Dual ion batteries (DIBs) have a high energy density and relatively low cost, making them promising for use in various devices. By understanding the dynamic interactions of water within the pores of hierarchically structured cathode materials combined with layered double hydroxides (LDH), we aim to gain insights into the electrochemical performance and stability of these materials. On the anode side, we will explore the dynamic interactions of water during charge/discharge cycles and the effects of electrolyte additives on Zn dendrite formation. Key scientific questions include: What are new efficient electrolyte additives capable of controling charge/discharge processes on metallic Zn anodes? What is the mechanism at the atomistic scale? How can we develop the effective anion intercalation cathode assembled on hierarchically designed current collectors and open a pathway for the implementation of DIBs? What is the role of water in the ion-exchange processes and in the charge transfer within double hydroxide layers and in the interlayer spaces?

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