Title
Organically modified ionogels: the ultimate material to improve the
electrolyte-electrode contact in solid SIBs? (Research)
Abstract
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.
Period of project
01 November 2020 - 31 October 2022