Pursuing high voltage and long lifespan for low-cost Al-based rechargeable batteries: Dual-ion design and prospects

Aluminum (Al) is the most abundant metal element in Earth's crust. Al-based rechargeable batteries have aroused booming attention by virtue of high theoretical capacity and low cost, while detrimental shortages such as lower voltage and inferior lifespan limit their practical application. Regarded as a promising opportunity to tackle this issue, Al-based rechargeable batteries are redesigned for dual-ion configuration with the aid of anion-inserting cathode, which is called Al-based dual-ion batteries (ADIBs). In this review, in-depth insights into ADIBs are comprehensively established, including basic merits, fundamental mechanisms and underlying challenges. Moreover, diverse strategies for advanced cathode, electrolyte and Al metal anode in ADIBs are also outlined. Afterwards, the pivotal perspective towards future development of ADIBs are discussed in detail.