Quinone Redox-Active Ionic Liquids

Simple ionic liquids exhibit unique physical and chemical properties that make them very useful for deployment in electrochemical devices such as solvent-free electrolytes in capacitors and batteries. However, incorporating redox functionality into ionic liquid structures opens up in situ faradaic electrochemistry which allows access to a large array of new electrochemical applications reliant upon heterogeneous or homogenous electron-transfer processes. This paper presents and discusses the opportunities and challenges for these types of electro-materials across a myriad of applications by considering exemplar quinone-functionalised ionic liquids.