A Critical Review of Ultrafast Charging Dual-Ion Batteries

With the increasing prevalence of mobile devices and electric vehicles, the demand for energy storage systems has risen significantly. The current widely used lithium-ion battery architecture demonstrates the limitations of available materials and electrochemistry. Therefore, advanced battery systems, such as ultrafast charging/discharging, are necessary. Herein, we aim to elaborate on one of the most promising candidates among them, the dual-ion batteries (DIBs). Differing from conventional rocking-chair batteries, DIBs utilize both cations and anions as charge carriers, addressing rate-limiting steps and eliminating the need for ions to travel between electrodes during charge and discharge, thereby enabling ultrafast charging. In this review, we discuss the principles of ultrafast charging in DIBs, explore various types and their working mechanisms, and examine optimization strategies to enhance their performance. In addition, we highlight ongoing efforts and future perspectives in DIB development, aiming to stimulate further innovative research in this emerging field of energy storage.