With its consistent thermal runaway temperature and superior capacity, aluminum ion batteries have emerged as a key area for battery development. At the moment, electrode material is the main focus of aluminum ion battery capacity enhancement. Selenide is anticipated to develop into a high-performance cathode for aluminum ion batteries, since it is a type of high energy density electrode material. However, because selenide is soluble in acid electrolytes, Al-Se batteries have low cycle performance and cannot keep up with the present demand for electronic gadgets. Here, homogeneous-structured precursors were created via a hydrothermal reaction, and MnSe₂–MnSe heterojunction hollow spheres were created a step further via temperature control of the selenidation reaction. With 103.76 mAh/g of specific capacity remaining after 3000 cycles at 1.0 A/g, this novel heterojunction material exhibits astounding cycle stability. After additional investigation, it was shown that the MnSe₂–MnSe heterojunction may prevent the dispersion of the active substances, significantly enhancing the cycle performance. The density of states (DOS) of electrode materials demonstrates the superior electronic conductivity of this heterojunction material. Meanwhile, it was computationally demonstrated that the MnSe₂–MnSe heterojunction has a strong adsorption energy for AlCl₄⁻, thus accelerating the reaction kinetics. In summary, the performance of selenides has been improved by this novel heterojunction material, which also makes for a superior cathode material.

铝离子电池凭借其稳定的热失控温度和卓越的容量，已成为电池发展的关键领域。目前，电极材料是铝离子电池增容的重点。硒化物是一种高能量密度电极材料，有望发展成为铝离子电池的高性能正极。然而，由于硒化物易溶于酸性电解质，铝硒电池的循环性能较低，无法满足当前电子产品的需求。在这里，通过水热反应创建了均质结构的前驱体，并通过硒化反应的温度控制进一步创建了MnSe _{2 -MnSe 异质结空心球。}这种新型异质结材料在 1.0 A/g 电流下循环 3000 次后仍具有 103.76 mAh/g 的比容量，表现出惊人的循环稳定性。经过进一步的研究，结果表明MnSe ₂ -MnSe异质结可以防止活性物质的分散，从而显着提高循环性能。电极材料的态密度（DOS）表明该异质结材料具有优异的电子导电性。同时，计算表明MnSe _{2 -MnSe异质结对AlCl 4} ^-具有很强的吸附能，从而加速了反应动力学。总之，这种新型异质结材料提高了硒化物的性能，这也使其成为一种优异的正极材料。