While 2D MXenes have been widely used in energy storage systems, surface barriers induced by restacking of nanosheets and the limited kinetics resulting from insufficient interlayer spacing are two unresolved issues. Here an Sn⁴⁺ preintercalated Ti₂CT_X with effectively enlarged interlayer spacing is synthesized. The preintercalated Ti₂CT_X is aligned on a carbon sphere to further enhance ion transportation by shortening the ion diffusion path and enhancing the reaction kinetics. As a result, when paired with a Zn anode, 12 500 cycles, which equals 2 800 h cycle time, and 5% capacity fluctuation are obtained, surpassing all reported MXene‐based aqueous electrodes. At 0.1 A g^‐1, the capacity reaches 138 mAh g^‐1, and 92 mAh g^‐1 remains even at 5 A g^‐1. In addition, the low anti‐self‐discharge rate of 0.989 mV h^‐1 associated with a high capacity retention of 80.5% over 548 h is obtained. Moreover, the fabricated quasi‐solid capacitor based on a hydrogel film electrolyte exhibits good mechanical deformation and weather resistance. This work employs both preintercalation and alignment to MXene and achieves enhanced ion diffusion kinetics in an aqueous zinc ion capacitors (ZICs) system, which may be applied to other MXene batteries for enhanced performance.

中文翻译：

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垂直排列的Sn4 +预嵌入Ti2CTX MXene球体，具有增强的锌离子传输和出色的循环寿命

尽管2D MXenes已广泛用于能量存储系统中，但由于纳米片的重新堆叠而引起的表面屏障以及由于层间间距不足而导致的动力学受限是两个尚未解决的问题。在此合成了具有有效增大的层间间距的Sn ⁴⁺预嵌入的Ti ₂ CT _X。预插入的Ti ₂ CT _X在碳球上排列，以通过缩短离子扩散路径和增强反应动力学来进一步增强离子传输。结果，当与Zn阳极配对时，可获得12 500个循环，相当于2 800 h循环时间，并且容量波动为5％，超过了所有报道的基于MXene的水性电极。在0.1 A g ^-1下的容量达到138毫安克^-1，和92具毫安克^-1遗体甚至在5 A G ^-1。此外，获得了0.989 mV h ^-1的低自放电率，并在548 h内保持了80.5％的高容量。此外，基于水凝胶薄膜电解质制成的准固态电容器具有良好的机械变形和耐候性。这项工作同时使用了预嵌入和与MXene的对准，并在水性锌离子电容器（ZIC）系统中实现了增强的离子扩散动力学，可以将其应用于其他MXene电池以提高性能。