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Electrochemical energy storage is at the core of the energy transition, and the scientific community is being called upon to contribute to the development of new and more sustainable energy storage solutions. The current market is dominated by conventional carbon ultracapacitors (low energy-high power densities) and batteries (high energy-moderate power densities), particularly lithium-ion batteries. Between these two families of systems, there is a significant gap in terms of device metrics. To fill this gap, it is crucial to design new materials and combine them appropriately to fully explore their electrode potential. This strategy enables the development of hybrid or asymmetric electrochemical energy storage devices with tailored metrics that meet specific application requirements. Thus, the electrode materials play a pivotal role in defining the metrics of the energy storage device, and this research area paves the way to solving many bottlenecks in the electrochemical energy storage field.

This presentation overviews the latest advances in the design, production, and testing of electrode materials, including materials recycled from spent lithium-ion batteries, and their potential applications in a new generation of high-power electrochemical devices operating in environmentally friendly aqueous electrolytes. A comprehensive overview of the most promising materials and electrolytes will be given, and a set of selected examples will highlight how scale-up and commercialization can be achieved in this important field.


Acknowledgments: The author acknowledges the funding provided by Fundação para a Ciência e a Tecnologia through the Projects: DOI 10.54499/PTDC/QUI-ELT/2075/2020, DOI 10.54499/2022.05187.PTDC, DOI 10.54499/UIDP/00100/2020, DOI 10.54499/UIDP/00100/2020 and DOI 10.54499/LA/P/0056/2020 and PRR NGS Agenda

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