Anthraquinone derivatives supported by Ti3C2(MXene) as cathode materials for aluminum-organic batteries

Due to the advantages of aluminum in abundance in the earth's crust and safety, how to exploit these advantages to develop high-performance rechargeable aluminum batteries to replace traditional batteries has become an urgent issue. The key to solving this problem is to find suitable materials as cathode for aluminum batteries. Here, we propose a strategy in which Ti3C2(MXene) is used as a loaded structure for the organic anthraquinone derivative Benzo[1,2-b:4,5-b']dithiophene-4,8-dione (BDTO). This strategy enables the self-stacking of monolayer MXene into a layered structure while embedding organics into it. The unique structure enables efficient and reversible intercalation/deintercalation of Al3+. At the same time, it exhibits excellent electrochemical performance, and its reversible capacity reaches 229.8 mAh g−1. Moreover, it can still maintain a capacity of 134.9 mAh g−1 after 500 cycles. In addition, compared with BDTO, the rate performance of [email protected] has also been greatly improved. Meanwhile, this unique layered structure also brings better electronic conductivity and ionic diffusion coefficient. We also demonstrate that the battery mechanism is a reaction between three CO and one Al3+ through multiple characterization methods and density functional calculations (DFT). The advantages of [email protected] provide a better research basis for the study of rechargeable Aluminum-Organic batteries, and provide a good idea to explore the development of Aluminum-Organic batteries.