To cite this article: Shoparwe, N. F. et al. (2018). Fabrication, characterisation and electrochemical properties of heterogeneous multiwalled carbon nanotubes cation exchange membranes (MWCNT-CEMs). J. Phys. Sci., 29(Supp. 1), 41–48, https://doi.org/10.21315/jps2018.29.s1.6
Heterogeneous multiwalled carbon nanotubes cation exchange membranes (MWCNT-CEMs) were successfully prepared through dry-wet phase inversion method. Different amount of MWCNTs were added into the casting solutions. The physical and chemical characteristics of the MWCNT-CEMs were analysed. The electrochemical properties of MWCNT-CEMs were examined by electrochemical impedance spectroscopy (EIS) technique. The results of impedance were fitted to the modified Randles equivalent circuit with constant phase element and restricted linear diffusion model to determine the individual parameter of the electrochemical. Modified membrane casted with 1.0 wt% of MWCNT shows the best ion-exchange capacity (IEC), the lowest membrane resistance, and the highest ion conductivity. This suggests that such amount of MWCNT provides the optimum area of conducting regions in the membrane structure to facilitate counter ions passage.