摘要
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 (CH 3 NH 3 PbI 3 (MAPbI 3 ) and long-chain alkylammonium (C 4 H 9 NH 3 ) 2 (CH 3 NH 3 ) 3 Pb 4 I 13 ((iBA) 2 (MA) 3 Pb 4 I 13 ) thin films as electrode materials for rechargeable Al-ion batteries. Our results showed that (iBA) 2 (MA) 3 Pb 4 I 13 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 (C 4 H 9 NH 3 ) 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.