Aromatic heterocyclic anion based ionic liquids and electrolytes

Abstract

Five new ionic materials comprising fluorine-free aromatic heterocyclic anions based on pyridine and pyrazine combined with a common n-tetrabutylphosphonium cation, (P4444)+, result in two room temperature ionic liquids (RTILs), one...

Pyrrolidium‐ and Imidazolium‐Based Ionic Liquids and Electrolytes with Flexible Oligoether Anions

“…This suggests efficient ion dissociation with increasing temperature, leading to homogeneity, which agrees well with the ionic conductivity and ion diffusivity data, and also to our previous study. [18] The chemical environment in the electrolytes is strongly affected by increased temperature, but the electrolytes are influenced differently. The chemical shift of Li + in [(MMBIm)(MEEA)] 0.7 [(Li)(MEEA)] 0.3 moves towards lower ppms, while for [(MBPyrr)(MEEA)] 0.7 [(Li)(MEEA)] 0.3 it shifts towards higher ppms (Figure 9b).…”

Ionic liquids revolutionizing biomedicine: recent advances and emerging opportunities

“…For internal factors, the types of cation and anion can affect the conductivity of ILs. [55][56][57] The wide electrochemical window and superior electrochemical performance of ILs lead to their application in diagnostic medicine, such as using as an electrolyte and a modified electrode in the production and improvement of the performance of sensors.…”

Ionic Liquids and Electrolytes with Flexible Aromatic Anions

“…The anion also plays an important role in the overall physicochemical and electrochemical properties, including the mobility of the Li + ions – via ion‐ion and other interactions [25] . While many studies of IL‐based electrolytes have been reported during the last two decades, [26–28] most use commercially available ILs [29] and only few new anions have been reported [30–34] . Here we present a new class of fluorine‐free ILs and their corresponding electrolytes based on anions with aromatic centre and different oligoether chains.…”

“…[25] While many studies of IL-based electrolytes have been reported during the last two decades, [26][27][28] most use commercially available ILs [29] and only few new anions have been reported. [30][31][32][33][34] Here we present a new class of fluorine-free ILs and their corresponding electrolytes based on anions with aromatic centre and different oligoether chains. The use of a carboxylate group alongside an ether oxygen atoms containing chain, make these anions mimic the organic solvents commonly used in LIBs, such as glymes, [35][36][37] and carbonates, [38,39] but with the idea of the advantageous IL properties added in the design -and therefore systematic correlations between anions/ILs and key physicochemical properties are developed, with an emphasis on the ion transport and usefulness as battery electrolyte components.…”