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Poly(methyl methacrylate) (PMMA)-based MIM devices have been investigated using four different combinations of electrode/electrolyte arrangement in the device geometry in order to elucidate the resistive switching characteristics.

Electrochemical performance of carbon materials can be enhanced by doping with heteroatoms. Electrochemical investigations suggest that the B‐doped graphene in which B‐source and graphene oxide are in the ratio 1 : 1 demonstrates a highest specific capacitance of 406 F/g at 2 A/g in 1 M H2SO4. The specific capacity of B‐doped graphene in 0.01 M hydroquinone (HQ)/H2SO4 is 2523 C/g in redox additive electrolyte. Performance evaluation of fabricated symmetric supercapacitor cell indicates that the specific capacitance in 0.01 M HQ/H2SO4 and 1 M H2SO4 solution are found to be 440 and 284 F/g at 3 A/g, respectively and greater than EMIMBF4 (97 F/g). The maximum specific energy of the fabricated symmetric cell achieved using 0.01 M HQ/H2SO4 solution is found to be 50 Wh/kg which is comparatively superior than 1 M H2SO4 (14.2 Wh/kg) and EMIMBF4 (30 Wh/kg).