Research progress on high voltage window aqueous rechargeable batteries
With the rapid development of multifunctional electronic products,electric vehicles,and large-scale grid energy storage technologies,the demands for safety and efficiency in electrochemical energy storage systems are contin-uously increasing.Aqueous rechargeable batteries,as an emerging energy storage technology,offer outstanding safety,environmental friendliness,and low-cost advantages.However,the water decomposition reaction imposes limitations on the electrochemically stable voltage window of the aqueous batteries,thereby diminishing its energy density.Numerous studies have demonstrated that enhancing the energy density of aqueous batteries will substantially augment its market share.Consequently,expanding the voltage window of aqueous batteries has emerged as an urgent quandary to ad-dress.First,this paper explores the basic principles and influencing factors of the electrochemical stability window of aqueous electrolytes.Then,it discusses strategies to enhance the operating voltage of aqueous batteries,including e-lectrode surface design and modification,pH adjustment of electrolytes,construction of artificial interface layers,use of high-concentration electrolytes,and application of electrolyte additives,while introducing the latest advancements in these fields.Finally,the paper addresses the potential and challenges of expanding the voltage window and increasing the operating voltage of aqueous batteries,aiming to provide in-depth insights for the future development of high-energy aqueous batteries.
aqueous batterieshigh voltage windowelectrolyte optimizationelectrode material design
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