Room Temperature Ionic Liquid‐based Electrolytes as an Alternative to Carbonate‐based Electrolytes

Abstract

The issue of the safety of Li‐ion batteries is becoming more critical with the increase in their size for applications in large energy storage devices, such as hybrid electric vehicles (HEVs), and energy storage systems (ESSs) for smart grids. The thermal runaway of Li‐ion batteries is considered to be caused by their flammable components, such as the volatile carbonate solvents of electrolytes. Room temperature ionic liquids (RTILs) have recently received much attention because of their characteristics of non‐flammability and non‐volatility. In addition, RTILs show high ionic conductivity and a wide electrochemical stability window. Therefore, RTIL‐based electrolytes are considered one of the most promising candidates to improve the safety of Na‐ion, as well as Li‐ion batteries; indeed, RTIL‐based electrolytes have shown excellent improvements in terms of thermal stability and electrochemical performance. This review provides a comprehensive overview of selected RTIL materials, including their physicochemical and electrochemical properties. Moreover, we discuss the failure mechanisms of certain RTIL‐based electrolytes with various electrodes to suggest alternative strategies for improving their electrochemical performance.

Efek Penggunaan Cairan Ionik sebagai Aditif terhadap Konduktivitas Ionik Elektrolit Baterai Ion Litium

“…Selain itu cairan ionik stabil secara kimia dan elektrokimia. Cairan ionik memiliki stabilitas oksidatif yang baik, stabil di atas 4V [17] . Sebagai pelarut, cairan ionik merupakan material yang mahal dan memiliki viskositas yang tinggi, terutama ketika digunakan untuk melarutkan garam litium yang menyebabkan transfer Li + rendah dibandingkan dengan elektrolit berbasis pelarut organik karbonat.…”

Specifically Designed Ionic Liquids—Formulations, Physicochemical Properties, and Electrochemical Double Layer Storage Behavior

“…Among the nonflammable or safer electrolytes investigated thus far, ionic liquids (ILs) have been considered as the most promising candidates. In contrast to carbonate-based electrolytes, ILs possess nonflammability, negligible volatility, and high thermal and electrochemical stabilities [13][14][15][16][17]. However, they possess high viscosity, and with a few exceptions, exhibit low pristine ionic conductivity, which deteriorates to an unacceptable value (<1 mS cm −1 ) when a lithium salt in >0.5 M concentration is added.…”

Kaolinite Clay Mineral Reactivity Improvement through Ionic Liquid Functionalization

“…The impressive potential of ionic liquids (ILs) explained their increasing implication in multiple research areas. ILs are excellent solvents in organic synthesis, electrolytes in electrochemistry, catalysts and are frequently used as additive or modifier in materials chemistry . The strong implication in the field of materials chemistry results from the constant quest for material properties improvement for more specific and specialized applications.…”

“…ILs are excellent solvents in organic synthesis, electrolytes in electrochemistry, catalysts and are frequently used as additive or modifier in materials chemistry. [1][2][3][4][5][6][7][8][9] The strong implication in the field of materials chemistry results from the constant quest for material properties improvement for more specific and specialized applications. In the native state, materials are limited by structural physicochemical constraints.…”