Triazine(Tz)-based conjugated polymers with redox activity have drawn considerable attention as electrode materials for sustainable rechargeable batteries due to the features such as structural stability and electron-...Triazine(Tz)-based conjugated polymers with redox activity have drawn considerable attention as electrode materials for sustainable rechargeable batteries due to the features such as structural stability and electron-withdrawing nature of the Tz unit.However,it is rather challenging to synthesize highly redox-active Tz-based conjugated polymer electrodes under both ecological and cost-effective conditions.In this study,an ionothermal Friedel-Crafts reaction is developed for the efficient production of redox-active Tz-based conjugated polymers by using an AlCl_(3)-NaCl-KCl eutectic salt as a solvent-catalyst system and polycyclic aromatic compounds with cyanuric chloride as the starting monomers.As proof-of-concept,a series of Tz-based conjugated polymers were synthesized with high yields in the range of 74.8%-94.6%.The resulting Tz-based polymers exhibit excellent electrochemical performance when serving as the cathode materials in rechargeable Al batteries,Na batteries,and aqueous Zn batteries,including high capacities(141.8,163.5,and 161.4 mAh g^(-1),respectively),high operating voltage,as well as fast rate capability.Moreover,the ionothermal-synthesized Tz-based polymers also present much higher redox activity than their counterparts produced under traditional Friedel-Crafts reaction conditions.These results in this work offer a promising pathway to construct highly redox-active Tz-based conjugated polymer electrode materials for sustainable rechargeable batteries.展开更多
基金supported by the National Natural Science Foundation of China(52103264,22175110,22375076)the Hubei Provincial Natural Science Foundation of China(2024AFA031)+2 种基金the Fundamental Innovation Project in the School of Materials Science and Engineeringthe Fundamental Research Funds for the Central Universities(GK202501012,GK202202001)the Science and Technology Innovation Team of Shaanxi Province(2023-CX-TD-27)。
文摘Triazine(Tz)-based conjugated polymers with redox activity have drawn considerable attention as electrode materials for sustainable rechargeable batteries due to the features such as structural stability and electron-withdrawing nature of the Tz unit.However,it is rather challenging to synthesize highly redox-active Tz-based conjugated polymer electrodes under both ecological and cost-effective conditions.In this study,an ionothermal Friedel-Crafts reaction is developed for the efficient production of redox-active Tz-based conjugated polymers by using an AlCl_(3)-NaCl-KCl eutectic salt as a solvent-catalyst system and polycyclic aromatic compounds with cyanuric chloride as the starting monomers.As proof-of-concept,a series of Tz-based conjugated polymers were synthesized with high yields in the range of 74.8%-94.6%.The resulting Tz-based polymers exhibit excellent electrochemical performance when serving as the cathode materials in rechargeable Al batteries,Na batteries,and aqueous Zn batteries,including high capacities(141.8,163.5,and 161.4 mAh g^(-1),respectively),high operating voltage,as well as fast rate capability.Moreover,the ionothermal-synthesized Tz-based polymers also present much higher redox activity than their counterparts produced under traditional Friedel-Crafts reaction conditions.These results in this work offer a promising pathway to construct highly redox-active Tz-based conjugated polymer electrode materials for sustainable rechargeable batteries.
