In this study, MXene membranes were
obtained by vacuum
filtration
and the membranes were evaluated by electrochemical impedance spectroscopy
(EIS) using an electrolyte/membrane/water system and a four-electrode
method. The prepared MXene membranes were heated at 130 and 200 °C.
X-ray diffraction, Fourier transform infrared, and Raman results showed
that the heating treatment narrowed the layer spacing, which could
be attributed to a self-cross-linking reaction between the MXene platelets
during the heating treatment. The EIS results indicated that the inductance
of the MXene membranes increased with rising temperature, which should
be attributed to the reduced layer spacing of the membrane, making
it more difficult for ions to penetrate into the membrane resulting
in a more unevenly distributed charge environment in the membrane.
The machine learning method was further used to explore the most important
factor that affected the inductance of the MXene membrane. The results
exhibited that the layer spacing was more influential than the electrolyte
concentration and soaking time on the inductance. Therefore, the inductance
of MXene membranes could be tuned by adjusting the layer spacing of
MXene, which might be potentially applied in nanoelectronic devices
with high inductance.