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Recent Progress and Future Trends of Aluminum Batteries

As one of the most promising alternatives to next-generation energy storage systems, aluminum batteries (ABs) have been attracting rapidly increasing attention over the past few years. In this review, we summarize the recent advancements of ABs based on both aqueous and non-aqueous electrolytes, with a particular focus on rechargeable non-aqueous ionic liquid-based aluminum-ion batteries (AIBs). Progress of the current intensive investigation on the development of cathode materials and electrolytes in non-aqueous AIBs are discussed. Then research efforts towards aqueous ABs are described to give readers a broader view of the aluminum battery family. Finally, the review summaries the key challenges underpinning ABs and provides future research perspectives on this growing field.