Effect of specific surface area on capacitance in asymmetric carbon/α-MnO2 s…

a b s t r a c t α-MnO2 has been made using a solid state synthesis and the specific surface area then modified through milling. The formation of α-MnO2 (specific surface area 96m2 g−1) has been studied by SEM and powder XRD prior to milling. Electrode films (cast using MnO2, graphite and PVDF) have been investigated using N2 sorption at 77K and show a more complex relationship than thei…