A new supercapacitor electrode material Ti₃C₂T_X@Al (T = OH, O) derived from Ti₃AlC₂ is prepared by partly removing aluminum using alkali etching method at 40 °C. The reserved aluminum can not only ensure high interlayer conductivity but also prevent the structure from collapsing. The effect of etching time is investigated, the sample Ti₃C₂T_X@Al obtained after etching 36 h in sodium hydroxide exhibits the best electrochemical performance among the series of samples. In 1M H₂SO₄, the material shows a high specific capacitance of 587 F g⁻¹ at the current density of 1 A g⁻¹, and 173 F g⁻¹ at 10 A g⁻¹. A low capacitance loss can be observed (0.0025% one cycle) after 6000 cycles test at the current density of 20 A g⁻¹. It implies that the material Ti₃AlC₂ which etching in sodium hydroxide for 36 h may be a promising candidate for energy storage material, and this simple synthesis method can also be applied to other MAX members.

通过在40°C下通过碱蚀刻法部分去除铝，制备了一种新的超级电容器电极材料，该材料由Ti ₃ AlC ₂衍生而来，新的Ti ₃ C ₂ T _X @Al（T = OH，O）。保留的铝不仅可以确保高的层间电导率，而且还可以防止结构塌陷。研究了腐蚀时间的影响，在氢氧化钠中腐蚀36 h后得到的样品Ti ₃ C ₂ T _X @Al在一系列样品中表现出最好的电化学性能。在1M H ₂ SO _4中，该材料显示出587 F g ^-1的高比电容电流密度为1 A g ^-1时为173 F g ^-1，电流密度为10 A g ^-1时。在20 A g ^-1的电流密度下进行6000次循环测试后，可以观察到较低的电容损耗（一个循环为0.0025％）。这表明在氢氧化钠中蚀刻36 h的Ti ₃ AlC ₂材料可能是储能材料的有前途的候选者，这种简单的合成方法也可以应用于其他MAX构件。