The effect of etching environment (opened or closed) on the synthesis and electrochemical properties of V₂C MXene was studied. V₂C MXene samples were synthesized by selectively etching of V₂AlC at 90 °C in two different environments: opened environment (OE) in oil bath pans under atmosphere pressure and closed environment (CE) in hydrothermal reaction kettles under higher pressures. In OE, only NaF (sodium fluoride) + HCl (hydrochloric acid) etching solution can be used to synthesize highly pure V₂C MXene. However, in CE, both LiF (lithium fluoride) + HCl and NaF+HCl etchant can be used to prepare V₂C MXene. Moreover, the V₂C MXene samples made in CE had higher purity and better-layered structure than those made in OE. Although the purity of V₂C obtained by LiF+HCl is lower than that of V₂C obtained using NaF+HCl, it shows better electrochemical performance as anodes of lithium-ion batteries (LIBs). Therefore, etching in CE is a better method for preparing highly pure V₂C MXene, which provides a reference for expanding the synthesis methods of V₂C with better electrochemical properties.

研究了刻蚀环境（开放或封闭）对V ₂ C MXene的合成和电化学性能的影响。V ₂ C MXene样品是通过在两种不同的环境（90°C下在油浴锅中的开放环境（OE）在大气压下）和封闭环境（CE）在较高压力下的水热反应釜中在90°C下选择性蚀刻V ₂ AlC来合成的。在OE中，仅NaF（氟化钠）+ HCl（盐酸）蚀刻溶液可用于合成高纯度的V ₂ C MXene。但是，在CE中，LiF（氟化锂）+ HCl和NaF + HCl蚀刻剂均可用于制备V ₂ C MXene。此外，V ₂CE制得的C MXene样品比OE制得的样品具有更高的纯度和更好的分层结构。虽然V中的纯度₂下用的LiF +盐酸得到比Ⅴ的下部₂以NaF +盐酸C中得到，它示出了更好的电化学性能作为锂离子电池（LIBS）阳极。因此，在CE中进行刻蚀是一种制备高纯V ₂ C MXene的较好方法，为扩展具有更好电化学性能的V ₂ C的合成方法提供了参考。