Green Solid Ionic Liquid Crystalline Electrolyte Membranes with Anisotropic Channels for Efficient Li‐Ion Batteries

Abstract

A biobased ionic liquid crystal derived solid polymer electrolyte (BILC‐SPE) membrane, consisting of polymeric backbone, lithium salt, and cardanol derived ionic liquid crystals along with conventional plasticizer is fabricated using a facile and simple strategy. The in‐house prepared solid polymer electrolyte membrane within optimum concentration of individual counterparts has been deployed as electrolyte cum separator in lithium‐ion cells in combination with oxide and phosphate family cathodes individually to demonstrate its suitability and compatibility for energy storage applications. With carefully chosen 3‐(4‐(3‐pentadecylphenoxy) butyl)‐1‐methylimidazole‐3‐ium hexafluorophosphate as the ionic liquid crystal counterpart, the membrane exhibits high conductivity along with high porosity, wettability, and Li‐ion transport number owing to the presence of anisotropic channels that aid the facile transport kinetics desired for the cell performance. Promising results obtained regarding compatibility of cell components, excellent specific capacity, appreciable Coulombic efficiency, and cycling stability of the lithium‐ion cell investigated with BILC‐SPE developed from the low‐cost industrial waste not only revolutionize the performance of energy storage devices but also render a platform to create cleaner environment.

Flame Retardant and Stable Li1.5Al0.5Ge1.5(PO4)3-Supported Ionic Liquid Gel Polymer Electrolytes for High Safety Rechargeable Solid-State Lithium Metal Batteries

“…Here, we further investigated the temperature dependence of the ion conductivity of the composite electrolyte with various active filler-LAGP concentrations ranging from 5% to 20%. As shown in Figure b, when increasing the temperature, the conductivity of the ILGPEs also gradually increases in a linear manner, showing thermally activated conduction . It is observed that ILGPEs- x %­LAGP have a relatively high ionic conductivity with the content of LAGP at 10%, possessing the value of 0.76 × 10 –3 S cm –1 at 25 °C.…”

“…As shown in Figure 4b, when increasing the temperature, the conductivity of the ILGPEs also gradually increases in a linear manner, showing thermally activated conduction. 29 It is observed that ILGPEs-x%LAGP have a relatively high ionic conductivity with the content of LAGP at 10%, possessing the value of 0.76 × 10 −3 S cm −1 at 25 °C. At the same time, in order to compare the effects of different types of fillers on the ionic conductivity of ILGPEs, we have designed a set of comparative experiments to fully explain the effect of active filler on the electrolyte.…”

Sustainable Battery Materials from Biomass

“…Finally, biomass‐derived ionic liquid crystals may be used as solid electrolytes in sustainable battery applications. Using a waste product of the cashew industry as reagent, Devaki and co‐workers introduced an imidazolium‐based ionic liquid crystal electrolyte for supercapacitor applications with excellent cycling stability or for lithium‐ion batteries . These or other biomass‐based liquid crystals may be appealing for future applications as solid electrolytes/separators.…”

Noncovalent Approach to Liquid-Crystalline Ion Conductors: High-Rate Performances and Room-Temperature Operation for Li-Ion Batteries

“…These results suggest that the Li-ion diffusion rate in the LC electrolyte of 1/EC(29) was sufficient for the charge−discharge reaction up to the current rate of 500 mA g −1 . In the electrolyte of 1/EC (16), the potential plateaus of the charge/discharge profiles showed a plateau even at a current density of 100 mA g −1 . The extent of polarization was similar to that of 1/EC(29) at a high current density of 500 mA g −1 .…”

“…Intensive studies have focused on ion-transport solid and quasisolid organic materials − for the development of actuators, transistors, electrochromic devices, , water-treatment membranes, − and in particular, energy devices such as batteries − and capacitors ,, because solid organic materials have light-weight properties, easy processability, and film-forming abilities. These properties are advantageous for versatile and large-scale applications, especially for portable and flexible electronics.…”