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 batter-ies 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 MXene@BDTO 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 C=O and one Al3+through mul-tiple characterization methods and density functional calculations(DFT).The advantages of MXene@BDTO 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.

Gaohong Wu;Cuncai Lv;Wenrong Lv;Xiaoxiao Li;Wenming Zhang;Zhanyu Li

Hebei Key Laboratory of Optic-Electronic Information and Materials,National&Local Joint Engineering Laboratory of New Energy Photoelectric Devices,College of Physics Science and Technology,Hebei University,Baoding 071002,Hebei,China

能源化学

[1]Gaohong Wu;Cuncai Lv;Wenrong Lv;Xiaoxiao Li;Wenming Zhang;Zhanyu Li-.Anthraquinone derivatives supported by Ti3C2(MXene)as cathode materials for aluminum-organic batteries)[J].能源化学,2022(11):174-183

BDTO,Al3+through

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