This chapter explores the role of ionic liquids (ILs) in enhancing the performance of RFBs, focusing on their potential to overcome conventional limitations. . This technology strategy assessment on flow batteries, released as part of the Long-Duration Storage Shot, contains the findings from the Storage Innovations (SI) 2030 strategic initiative. The objective of SI 2030 is to develop specific and quantifiable research, development, and deployment (RD&D). . Flow batteries (FBs) are currently one of the most promising technologies for large-scale energy storage. This review aims to provide a comprehen ChemSocRev – Highlights from 2023. What is an inexpensive aqueous flow battery? An inexpensive aqueous flow battery for large-scale electrical energy. . Flow batteries are emerging as a transformative technology for large-scale energy storage, offering scalability and long-duration storage to address the intermittency of renewable energy sources like solar and wind. Energy storage on a grand scale is becoming more important as renewable power sources are being used more frequently. . The outdoor power supply is a portable energy storage power supply with a built-in lithium-ion battery and its own energy storage. It can provide convenient power for various electrical equipment, and can solve various power needs in one stop, especially in special occasions. When it comes to. . This paper aims to introduce the working principle, application fields, and future development prospects of liquid flow batteries. Fluid flow battery is an energy storage technology with high scalability and potential for integration with renewable energy. We will delve into its working principle. .