Recent advances in the use of organic-inorganic hybrid perovskites have been investigated in a variety of applications, such as solar cells, photodetectors, light-emitting devices, and lasers, because of their outstanding semiconductor properties. Furthermore, the perovskite structure can host extrinsic elements, making it a promising candidate for battery applications. Previous studies have shown that organic-inorganic hybrid perovskites can be suitable anode materials for both lithium- and sodium-ion batteries. However, multivalent rechargeable batteries with perovskite materials have not yet been realized. Herein, we studied the electrochemical performance of three-dimensional (CH₃NH₃PbI₃ (MAPbI₃) and long-chain alkylammonium (C₄H₉NH₃)₂(CH₃NH₃)₃Pb₄I₁₃ ((iBA)₂(MA)₃Pb₄I₁₃) thin films as electrode materials for rechargeable Al-ion batteries. Our results showed that (iBA)₂(MA)₃Pb₄I₁₃ presented a specific capacity of 257 mAh g^–1 at a current density of 0.1 A g⁻¹ and delivered 108 mAh g^–1 after 250 cycles at a current density of 0.3 A g⁻¹ with a retention of as high as 91 %, demonstrating a crucial role of isobutyl amine (C₄H₉NH₃) due to the unique hydrogen-bonding interaction of isobutyl amine that hinders the shuttle effect of polyiodide. The results open a new direction for the use of organic–inorganic hybrid perovskites for new secondary aluminum ion batteries.

有机-无机杂化钙钛矿的最新进展已在各种应用中进行了研究，例如太阳能电池、光电探测器、发光器件和激光器，因为它们具有出色的半导体性能。此外，钙钛矿结构可以承载外在元素，使其成为电池应用的有前途的候选者。先前的研究表明，有机-无机杂化钙钛矿可以作为锂离子电池和钠离子电池的合适负极材料。然而，具有钙钛矿材料的多价可充电电池尚未实现。在此，我们研究了三维(CH ₃ NH ₃ PbI ₃ (MAPbI ₃ )和长链烷基铵(C₄ H ₉ NH ₃ ) ₂ (CH ₃ NH ₃ ) ₃ Pb ₄ I ₁₃ (( i BA) ₂ (MA) ₃ Pb ₄ I ₁₃ ) 薄膜作为可充电铝离子电池的电极材料。我们的结果表明，( i BA) ₂ (MA) ₃ Pb ₄ I ₁₃在电流密度为 0.1 A g ^{-1时呈现 257 mAh g –1}的比容量，并提供 108 mAh g ^{–1在 0.3 A g −1}的电流密度下进行 250 次循环后，保留率高达 91%，证明了异丁胺 (C ₄ H ₉ NH ₃ ) 的关键作用，因为异丁胺具有独特的氢键相互作用，阻碍了聚碘化物的穿梭效应。该结果为有机-无机杂化钙钛矿在新型二次铝离子电池中的应用开辟了新方向。