Project R-11228

Organically modified ionogels: the ultimate material to improve the electrolyte-electrode contact in solid SIBs? (Research)

Batteries will take up an important role in the energy transition towards stationary energy storage to overcome the intermittent character of sustainable energy sources such as solar and wind energy. Sodium-ion batteries (SIBs) are viewed as the candidate to release pressure on resources and supply chains of lithium for lithium-ion batteries. Safety concerns, due to the volatile and flammable non-aqueous electrolytes used in commercial batteries, has shifted research interest to more safe solid electrolytes. In this project, organically modified ionogels will be investigated to overcome the currently observed low toughness and poor electrode contact of traditional solid electrolytes. These ormosil-type materials in general allow tuning of mechanical properties and are able to enhance electrode contact. Therefore, three different types of organic modification will be considered to design and synthesize ionogels showing toughness and ductility. A detailed (electro)chemical study of this solid electrolyte in contact with the electrode will be used to investigate the interface. This will allow the incorporation of the electrolyte in the cathode, followed by battery testing. Optimization and understanding of the mechanical properties in terms of material design will therefore allow to improve and maintain the contact with the electrodes in sodium ion batteries.

01 November 2020 - 31 October 2022