Abstract For stable, high-capacity aqueous zinc ion batteries (AZIBs), layered metal oxides, especially with multivalent metal ions, are promising active materials (cathodes) with high operating voltages. However, when uses in batteries prepared with conventional electrode fabrication methods, these materials suffer from low electrical conductivity and high active material detachment from the current collector, leading to poor electrochemical performance. Here, we present the synthesis of ultrathin V6O13 nanobelts containing multiple valences (V4+ and V5+) grown coaxially on carbon cloth (CC) using a hydrothermal method for the first time. The ultrathin V6O13 integrated into CC shows advantages such as fast electron transfer between the active material and current collector, low active material detachment, and short diffusion length in metal ion insertion-extraction. In AZIBs, V6O13@CC displays promising reversible galvanostatic charge-discharge capacity retention during cycling with excellent rate capability. An initial specific capacity of 227 mAh g−1 is obtained at 9 A g−1 and nearly 99% is retained after 1000 cycles. This stable reversible capacity is attributed to enhanced electrical conductivity and low active material detachment from the current collector (carbon cloth). This report discusses the hydrothermal preparation of a flexible cathode on CC that is promising for high-performance aqueous metal ion batteries.

中文翻译：

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在碳布上无粘合剂同轴生长的 V6O13 纳米带作为高度可逆的水性锌离子电池的阴极

摘要 对于稳定、高容量的水性锌离子电池 (AZIB)，层状金属氧化物，尤其是多价金属离子，是具有高工作电压的有前途的活性材料（阴极）。然而，当用于使用传统电极制造方法制备的电池时，这些材料的导电性低，活性材料从集电器上脱落，导致电化学性能差。在这里，我们首次使用水热法合成了在碳布 (CC) 上同轴生长的含有多价 (V4+ 和 V5+) 的超薄 V6O13 纳米带。集成到 CC 中的超薄 V6O13 显示出诸如活性材料和集流体之间的快速电子转移、低活性材料分离、和短的金属离子插入-提取扩散长度。在 AZIBs 中，V6O13@CC 在循环过程中表现出良好的可逆恒电流充放电容量保持率，并具有优异的倍率性能。在 9 A g-1 下获得 227 mAh g-1 的初始比容量，并且在 1000 次循环后仍保持近 99%。这种稳定的可逆容量归因于增强的导电性和低活性材料与集电器（碳布）的分离。本报告讨论了在 CC 上制备柔性阴极的水热制备，该阴极有望用于高性能水性金属离子电池。在 9 A g-1 下获得 227 mAh g-1 的初始比容量，并且在 1000 次循环后仍保持近 99%。这种稳定的可逆容量归因于增强的导电性和低活性材料与集电器（碳布）的分离。本报告讨论了在 CC 上制备柔性阴极的水热制备，该阴极有望用于高性能水性金属离子电池。在 9 A g-1 下获得 227 mAh g-1 的初始比容量，并且在 1000 次循环后仍保持近 99%。这种稳定的可逆容量归因于增强的导电性和低活性材料与集电器（碳布）的分离。本报告讨论了在 CC 上制备柔性阴极的水热制备，该阴极有望用于高性能水性金属离子电池。