图4. Ti₃AlC₂电极和不同选择性刻蚀时间Ti₃C₂电极的CV曲线，在扫描速度为20 mV/s；Ti₃C₂-24 h电极不同扫描速度的CV曲线；Ti₃AlC₂和不同刻蚀时间Ti₃C₂电极的GCD曲线，电流密度为1 A/g；T₃C₂-24 h电极不同电流密度的GCD曲线；前驱体材料Ti₃AlC₂和不同刻蚀时间Ti₃C₂电极的交流阻抗图谱以及T₃C₂-24 h电极的长循环性能

Fig.4. CV curves of Ti₃AlC₂ and Ti₃C₂ electrodes prepared with different selective etching times at scanning speed 20 mV/s (a); CV curves of Ti₃C₂-24 h electrodes at different scanning speeds (b); GCD curves of Ti₃AlC₂ and Ti₃C₂ electrode under 1 A/g current density prepared at different etching times (c); GCD curves of Ti₃C₂-24 h electrode under different current density (d); EIS impedance spectra of the precursor material Ti₃AlC₂ electrode and the Ti₃C₂ electrode prepared at different etching times (e) and cycling performance of T₃C₂-24 h electrode (f)