Aqueous I2-based batteries are a promising system for cost-effective and environmentally-friendly electricity storage. Here, the authors propose a high-capacity and long-lasting aqueous I2 battery system using an electrochemically active organic molecule at the negative electrode.

Recent development of analytical techniques – capable of characterizing physicochemical properties during electrochemical measurements – enables new pathways for improving the fundamental understanding of battery systems. This editorial highlights recent research efforts showcasing operando approaches published in Nature Communications.