Advanced Electrolyte Solution for Aqueous Lithium‐Ion Batteries: Extending Their Lifespan

Abstract Aqueous lithium‐ion batteries (ALIBs) leverage the advantages of water as a solvent, offering inherent safety, high ionic conductivity, cost‐effectiveness, and environmental sustainability, making them promising candidates for large‐scale energy storage applications. Nonetheless, two key challenges significantly imped their practical implementation: the unavoidable hydrogen evolution reaction (HER) due to water's limited electrochemical stability window and the pronounced corrosion of metal current collectors caused by the aquatic environment. Considerable advancements have been made in addressing these challenges, with strategies focusing on enhancing longevity broadly classified into two primary approaches: electrolyte bulk‐phase modulation and interface engineering. This review aims to consolidate insights into these strategies, delving into the scientific principles that underpin the mitigation of HER and corrosion in ALIBs.