The V₂C compound, belonging to the group of two-dimensional transition metal carbonitrides, or MXenes, has demonstrated a promising electrochemical performance in capacitor applications in acidic electrolytes; however, there is evidence to suggest that V₂C is unstable in an acidic environment. On the other hand, the performance of V₂C in neutral aqueous electrolytes is still moderate, and has not yet been systematically studied. The charge storage mechanism in a V₂C electrode, employed in neutral aqueous electrolytes, is investigated via cyclic voltammetry testing and in situ x-ray diffraction (XRD). Good specific capacitances are achieved, specifically 208 F/g in 0.5 M Li₂SO₄, 225 F/g in 1 M MgSO₄, 120 F/g in 1M Na₂SO₄, and 104 F/g in 0.5 M K₂SO₄. Using in situ XRD, we observe that, during the charge and discharge process, the c-lattice parameter shrinks or expands by up to 0.25 in MgSO₄, and 0.29 in Li₂SO₄ which demonstrates the intercalation/de-intercalation of cations into the d-V₂C layer.

V ₂ C 化合物属于二维过渡金属碳氮化物或 MXenes，在酸性电解质中的电容器应用中表现出良好的电化学性能。然而，有证据表明 V ₂ C 在酸性环境中不稳定。另一方面，V ₂ C 在中性水系电解质中的表现还算中等，尚未得到系统研究。通过循环伏安法测试和原位X 射线衍射 (XRD)研究了用于中性水性电解质的 V ₂ C 电极中的电荷存储机制。实现了良好的比电容，特别是在 0.5 M Li ₂ SO中为 208 F/g₄，在 1 M MgSO ₄中为 225 F/g，在 1M Na ₂ SO ₄中为 120 F/g，在 0.5 MK ₂ SO ₄中为 104 F/g 。使用原位XRD，我们观察到，在充电和放电过程中， MgSO _4中的c晶格参数收缩或膨胀高达 0.25 ，而 Li ₂ SO ₄中的 c 晶格参数收缩或膨胀高达 0.29，这证明了阳离子的嵌入/脱嵌。d -V ₂ C 层。