The HySoBatt project seeks to meet the increasing need for safer and more efficient energy storage solutions through the development of hybrid solid electrolytes (HSEs) for sodium-ion batteries (SIBs). Given the escalating worldwide commitments to carbon neutrality, exemplified by the European Green Deal, there is an imperative to shift from lithium-ion batteries due to supply chain vulnerabilities and environmental issues. SIBs, utilizing the plentiful and inexpensive sodium resources, have arisen as a feasible alternative, especially for stationary energy storage and economically sensitive applications.
Current solid-state ion batteries encounter significant hurdles, such as restricted compatibility of electrode materials and safety issues arising from the utilization of flammable organic liquid electrolytes. The HySoBatt project seeks to address these constraints by combining NASICON-type inorganic electrolytes with solid polymer electrolytes, resulting in a novel hybrid solid electrolyte (HSE) characterized by enhanced ionic conductivity and superior mechanical characteristics. This innovative electrolyte formulation is anticipated to augment battery energy density (~200 Wh/kg), prolong cycle life (>500 cycles), and markedly enhance safety by facilitating the utilization of sodium metal anodes
The research employs a multidisciplinary methodology, integrating materials chemistry, electrochemical engineering, and sophisticated characterization techniques. By refining the composition and microstructure of HSEs, the project will advance next-generation solid-state sodium battery technology, promoting European dominance in sustainable energy storage solutions.
