Abstract A highly efficient and effective nanostructured vanadium oxide (V2O5) compound was synthesized for supercapacitor applications. A facile two-step method comprising preheating activation, followed by a hydrothermal route was utilized to synthesize V2O5 nanorods. As an electrode, the V2O5 nanorods exhibited a high specific capacitance of 347 F g−1 at 1 A g−1. The remarkable cyclic stability of the V2O5 compound indicates adequate potential for the fabrication of a symmetric supercapacitor device. A coin-cell symmetric supercapacitor device assembled using the V2O5 electrode exhibited excellent electrochemical performance, including a specific capacitance of 172 F g−1, an energy density of 23.9 W h kg−1, a power density of 937 W kg−1, and capacitance retention of 94.3% after 10,000 cycles.

中文翻译：

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纽扣电池制造的两步合成 V2O5 纳米棒对称超级电容器装置

摘要 合成了一种高效且有效的纳米结构氧化钒 (V2O5) 化合物，用于超级电容器应用。一种简便的两步法，包括预热活化，然后是水热路线，用于合成 V2O5 纳米棒。作为电极，V2O5 纳米棒在 1 A g-1 下表现出 347 F g-1 的高比电容。V2O5 化合物显着的循环稳定性表明制造对称超级电容器装置具有足够的潜力。使用 V2O5 电极组装的纽扣电池对称超级电容器装置表现出优异的电化学性能，包括 172 F g-1 的比电容、23.9 W h kg-1 的能量密度、937 W kg-1 的功率密度和10,000 次循环后电容保持率为 94.3%。