Abstract Aluminum-ion batteries, as a feasible substitute for lithium-ion batteries, have the advantages of high safety, high capacity, low cost and environmental friendliness. However, the cathode material is one of the key factors restricting the performance and practical application of aluminum-ion batteries. Sulfur is becoming a promising cathode material for aluminum-ion batteries due to its considerable theoretical specific capacity. However, the poor conductivity of elemental sulfur seriously limits the development of aluminum-sulfur batteries. In this work, nitrogen doped three-dimensional multi-stage porous carbon materials (N-C/S) were prepared, which were compounded with sulfur to prepare carbon sulfur composite cathode materials. The microstructure, phase morphology, element composition and electrochemical performance were analyzed by various characterization methods. Then, N-C/S composite was used as a positive electrode to assemble a new type of aluminum-sulfur batteries, and its performance was evaluated. This novel high-performance N-C/S composite cathode holds great potential in future high-performance aluminum-sulfur batteries.

中文翻译：

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高性能铝硫电池用氮掺杂三维分级多孔碳/硫复合正极的制备

摘要 铝离子电池作为锂离子电池的可行替代品，具有安全性高、容量大、成本低、环境友好等优点。然而，正极材料是制约铝离子电池性能和实际应用的关键因素之一。由于其相当大的理论比容量，硫正成为一种很有前途的铝离子电池正极材料。然而，元素硫的导电性较差，严重限制了铝硫电池的发展。本工作制备了氮掺杂三维多级多孔碳材料（NC/S），并与硫复合制备碳硫复合正极材料。微观结构、相形貌、通过各种表征方法分析了元素组成和电化学性能。然后，以NC/S复合材料为正极组装新型铝硫电池，并对其性能进行评价。这种新型高性能 NC/S 复合正极在未来的高性能铝硫电池中具有巨大潜力。