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Recent Advances in Electrolytes for Potassium-Ion Batteries

机译：Recent Advances in Electrolytes for Potassium-Ion Batteries

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摘要

Potassium-ion batteries (KIBs) are considered as the potential energy storagedevices due to the abundant reserves and low cost of potassium. In thepast decade, research on KIBs has generally focused on electrode materials.However, since electrolytes also play a key role in determining the cellperformance, this review summarizes recent advances in KIB electrolytesand design strategies. Specifically, the review includes five parts. First, theorganic liquid electrolyte is the most widely used type for KIBs. Its two majorcomponents, salts and solvents, have a huge impact on the formation of thesolid electrolyte interphase and the performance of KIBs. Changes in salts/solvents, the introduction of additives, and the concentration increase allhave a positive effect on organic liquid electrolytes. Second, the design ofwater-in-salt electrolytes can effectively widen the narrow electrochemical stabilitywindow of aqueous electrolytes. Third, despite the appealing properties,the ionic liquid electrolytes have not been widely applied due to its high cost.Fourth, the solid-state electrolytes have drawn much attention due to highsafety, and current research has been working on improving their ionic conductivityat room temperature. Lastly, perspectives are provided to supportthe future development of suitable electrolytes for high-performance KIBs.

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