Cells constructed with both A-CuHHTP and B-CuHHTP exhibited similar high frequency responses as expected, with semi-circular responses and measured internal resistances of ca. 7.3 and 6.2 Ω, respectively. However, those constructed with B-CuHHTP displayed a low-frequency response with a greater variation from the idealised vertical line. This indicates poorer movement of the electrolyte ions through the 'rod-like' crystallites of B-CuHHTP than the 'flake-like' crystallites of A-CuHHTP. This supports the above hypothesis and confirms that 'flake-like' particle morphologies, as in A-CuHHTP, are desirable for higher capacitive performance with organic electrolytes, with the pore network allowing for easier access and motion of electrolyte ions. This supports previous observations with twodimensional porous carbon materials. Additional support for this hypothesis is seen by examining how both the real capacitance (C') and imaginary capacitance (C'') vary with frequency (Fig. ). For a supercapacitor, the plot of C' against log(f) tends to a plateau at low frequencies as the maximal capacitance is reached. Failure to plateau suggests incomplete ion accessibility of the pore volume and imperfect charge storage. The plot of C'' against log(f) typically goes through a maximum at a characteristic frequency, fo. This defines a time constant τo, the characteristic relaxation time of the system (i.e., the minimum time to discharge all of the energy from a device with an efficiency of more than 50%). A shift of τo to higher values suggests slower ionic movement in the material. Plots of C' and C'' against log(f) for A-CuHHTP and B-CuHHTP confirmed lower ionic accessibility and movement through the pore structure of the 'rod-like' crystals, with B-CuHHTP failing to reach a C' plateau or exhibit a maximum in C''. This supports the above EIS interpretation. Future work to directly observe the diffusion of NEt4BF4 within each sample would further confirm these findings, as has been performed previously for porous carbons. Finally, while cells assembled with C-CuHHTP displayed low internal resistances on-par with those of A-CuHHTP and B-CuHHTP (2.5 Ω), significant curvature of the high frequency response was observed. This is further evidence for high resistance to ion movement through agglomerated microstructures.