Recently, a large family of 2D materials called MXenes have attracted much attention in the field of supercapacitors, thanks to the excellent performance demonstrated by Ti₃C₂ MXene-based electrodes. However, research on MXenes for supercapacitor applications has been primarily focused on Ti₃C₂, even though there are more than 20 other members of this large family of materials already available. Studies on other MXenes are emerging, with promising results already achieved by Ti₂C, Mo₂C, and Mo_1.33C in aqueous electrolytes. Yet, many other MXenes remain unexplored in aqueous supercapacitor applications. In this work, we report on the electrochemical behavior of a vanadium carbide MXene, V₂C, in three aqueous electrolytes. Excellent specific capacitances were achieved, specifically 487 F/g in 1 M H₂SO₄, 225 F/g in 1 M MgSO₄, and 184 F/g in 1 M KOH, which are higher than previously reported values for few micrometer-thick delaminated MXene electrodes. This work shows the promise of V₂C MXene for energy storage using aqueous electrolytes.

最近，由于Ti ₃ C ₂ MXene基电极表现出的出色性能，称为MXene的大量2D材料家族在超级电容器领域引起了很多关注。然而，关于超级电容器应用的MXene的研究主要集中在Ti ₃ C _2上，尽管已经有20多种这种大型材料家族的其他成员。有关其他MXene的研究正在兴起，Ti ₂ C，Mo ₂ C和Mo _1.33已经取得了可喜的结果。C在水性电解质中。然而，许多其他MXene在水性超级电容器应用中仍未开发。在这项工作中，我们报告了碳化钒MXene V ₂ C在三种水性电解质中的电化学行为。实现了出色的比电容，特别是在1 MH ₂ SO _4中为487 F / g，在1 M MgSO _4中为225 F / g和在1 M KOH中为184 F / g，高于先前报道的几微米厚的值。分层MXene电极。这项工作表明V ₂ C MXene有望用于使用水性电解质进行能量存储。