Engineering intriguing cathode electrode with desirable kinetics behaviors is imperative for boosting aluminum storage systems. Here, a MXene and N-doped carbon dually protected Ni_0.6Co_0.4S solid solution (Ni_0.6Co_0.4S@MXene@NC) composite is reported as the cathode material for AIBs. The dissolution of Ni into CoS lattice leads to the electronic rearrangement, tuning its binding interaction with the Al³⁺ and modifying the Al³⁺ diffusion barrier. Consequently, the Ni_0.6Co_0.4S renders the high overall Al³⁺ adsorbability, and contributes to fast Al³⁺ diffusion kinetics. Additionally, the robust MXene@NC protective shell not only provides faster electron transfer pathway, but also contributes to high chemical and structural stability, attributed to the inhibition of active species dissolution and favorable tolerance to volume change. This novel design enables the Ni_0.6Co_0.4S@MXene@NC composite a high initial discharge capacity of 481.2 mA h g⁻¹ at 400 mA g⁻¹. Even at 1000 mA g⁻¹, the capacity still maintains at 125.2 mA h g⁻¹ after 300 cycles. Meanwhile, the investigation of reaction mechanism reveals that the cell involves the intercalation of Al³⁺ into Ni_0.6Co_0.4S to generate Al_lNi_mCo_nS and elemental Ni and Co. This work propels the process of enhancement of electrochemical performance for AIBs via smart designing and constructing cathode materials.

具有理想动力学行为的工程有趣的阴极电极对于提高铝存储系统是必不可少的。在这里，MXene 和 N 掺杂的碳双重保护的 Ni _0.6 Co _0.4 S 固溶体（Ni _0.6 Co _0.4 S@MXene@NC）复合材料被报道为 AIB 的正极材料。Ni 溶解到 CoS 晶格中导致电子重排，调整其与 Al ^{3+ 的}结合相互作用并改变 Al ³⁺扩散势垒。因此，Ni _0.6 Co _0.4 S 提供了高的整体 Al ³⁺吸附能力，并有助于快速的 Al ³⁺扩散动力学。此外，坚固的 MXene@NC 保护壳不仅提供更快的电子转移途径，而且有助于高化学和结构稳定性，这归因于活性物质溶解的抑制和对体积变化的良好耐受性。这种新颖的设计使 Ni _0.6 Co _0.4 S@MXene@NC 复合材料在 400 mA g ^{-1 下}具有 481.2 mA hg ^-1的高初始放电容量。即使在 1000 mA g ^{-1 下}，300 次循环后容量仍保持在 125.2 mA hg ^-1。同时，反应机理的研究表明，电池涉及到Al ³⁺嵌入Ni _0.6 Co _0.4S 生成 Al _l Ni _m Co _n S 和元素 Ni 和 Co。这项工作通过智能设计和构建正极材料推动了 AIB 电化学性能的提高。