Next-generation Rechargeable Batteries Utilizing Ionic Liquids and Various Charge Carriers

Abstract

Renewable energy resources and rechargeable batteries are key to establishing a carbon-neutral society. Lithium-ion batteries (LIBs) have been widely used in portable electronic devices for the past 30 years. However, the further spread of large-scale batteries is essential in the household and industrial sectors, which drives the research and development of technologies beyond LIBs. Since ionic liquids are safe and confer unique physicochemical properties, several next-generation batteries utilizing ionic liquid electrolytes have been researched. Sodium-ion and potassium-ion batteries show promise in overcoming the potential problems of LIBs related to the uneven distribution of lithium and cobalt resources.Fluoride-shuttle batteries deliver significantly higher theoretical energy densities compared to current LIBs. Nevertheless, many issues remain unresolved for the practical application of these batteries. This comprehensive paper provides several research topics on next-generation rechargeable batteries utilizing ionic liquids and various charge carriers, unveiling their novelty, the issues to be solved, and future research directions.

History of ECSJ Journal Series and Introduction of Award Winners in 2022

“…82 His award paper in this issue is mainly related to his achievement for next-generation rechargeable batteries utilizing ionic liquids and various charge carriers. 83 3.5 Excellent Paper Award of The Electrochemical Society of Japan In 2022, four papers are awarded from 93 published papers in 2021 which are listed in the list of references. [84][85][86][87]…”

Preface for the 66th Special Feature “Novel Aspects and Approaches to Experimental Methods for Electrochemistry”

“…His current research interests are focused on new electrode materials and electrolytes for Li-and Na-secondary batteries and investigation of their electrochemical and physical properties. 11,17,[61][62][63][64][65][66] Takayuki YAMAMOTO graduated from Graduate School of Energy Science, Kyoto University, and received his Ph 67 He has devoted himself to the research of rechargeable batteries using ionic liquids and various charge carriers, and has made contributions to the enhanced performance of sodium secondary batteries, [68][69][70] and the development of potassium secondary batteries [71][72][73] and fluorideshuttle batteries 74,75 with ionic liquid electrolytes.…”

In-Situ Raman Spectroscopic Analysis of Factors Improving Discharge Rate Capability of Na-Ion Batteries with FSA-Based Ionic Liquids

“…Recently, they have been increasingly used as largescale rechargeable batteries in hybrid vehicles and electric vehicles. However, two significant factors limit the application of LIBs in large-scale devices: the use of flammable electrolytes 5 and the reliance on scarce resources such as Li and Co. [6][7][8] One solution to these problems is the development of Na-ion batteries (NIBs) which utilize nonflammable and nonvolatile ionic liquids (ILs) [9][10][11] and the abundant resources of Na. 12,13 Researchers have explored various active materials and electrolytes for NIBs, 14,15 and various groups, including ours, have developed IL electrolytes that meet both safety and performance requirements.…”