Aqueous zinc‐ion batteries (AZIBs) based on vanadium oxides or sulfides are promising candidates for large‐scale rechargeable energy storage due to their ease of fabrication, low cost, and high safety. However, the commercial application of vanadium‐based electrode materials has been hindered by challenging problems such as poor cyclability and low‐rate performance. To this regard, sophisticated nanostructure engineering technology is used to adeptly incorporate VS2 nanosheets into the MXene interlayers to create a stable 2D heterogeneous layered structure. The MXene nanosheets exhibit stable interactions with VS2 nanosheets, while intercalation between nanosheets effectively increases the interlayer spacing, further enhancing their stability in AZIBs. Benefiting from the heterogeneous layered structure with high conductivity, excellent electron/ion transport, and abundant reactive sites, the free‐standing VS2/Ti3C2Tz composite film can be used as both the cathode and the anode of AZIBs. Specifically, the VS2/Ti3C2Tz cathode presents a high specific capacity of 285 mAh g−1 at 0.2 A g−1. Furthermore, the flexible Zn‐metal free in‐plane VS2/Ti3C2Tz//MnO2/CNT AZIBs deliver high operation voltage (2.0 V) and impressive long‐term cycling stability (with a capacity retention of 97% after 5000 cycles) which outperforms almost all reported Vanadium‐based electrodes for AZIBs. The effective modulation of the material structure through nanocomposite engineering effectively enhances the stability of VS2, which shows great potential in Zn2+ storage. This work will hasten and stimulate further development of such composite material in the direction of energy storage.

中文翻译：

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用于高性能水性锌离子存储的 MXene 稳定 VS2 纳米结构

基于钒氧化物或硫化物的水性锌离子电池（AZIB）由于其易于制造、低成本和高安全性，是大规模可充电储能的有希望的候选者。然而，钒基电极材料的商业应用一直受到循环性能差、倍率性能低等挑战性问题的阻碍。为此，采用先进的纳米结构工程技术巧妙地将VS2将纳米片放入 MXene 中间层中，以创建稳定的二维异质层状结构。 MXene 纳米片与 VS 表现出稳定的相互作用2纳米片之间的插层有效地增加了层间距，进一步增强了它们在 AZIB 中的稳定性。得益于具有高电导率、优异的电子/离子传输和丰富的反应位点的异质层状结构，独立式VS2/钛3C2时间z复合薄膜既可以用作AZIBs的阴极也可以用作阳极。具体来说，VS2/钛3C2时间z正极具有285 mAh g的高比容量−10.2 A g 时−1。此外，柔性的无锌金属面内VS2/钛3C2时间z//二氧化锰2/CNT AZIB 具有高工作电压 (2.0 V) 和令人印象深刻的长期循环稳定性（5000 次循环后容量保持率为 97%），其性能优于几乎所有报道的 AZIB 钒基电极。通过纳米复合工程对材料结构进行有效调控，有效增强VS的稳定性2，这在锌方面显示出巨大的潜力2+贮存。这项工作将加速并刺激此类复合材料在储能方向的进一步发展。