Investigation of protic ionic liquid electrolytes for porous RuO2 micro-supercapacitors

Energy Applications of Ionic Liquids: Recent Developments and Future Prospects

“…Additionally, proton ionic liquids have been utilized for rapid metal oxide deposition due to the fast transfer of H + ions. Seenath et al investigated various proton ionic liquids for RuO 2 porous electrode-based supercapacitors, using [N 2222 ]­[Tf 2 N] ([N 2222 ] + = tetraethylammonium) as the electrolyte, which enabled the assembled microsupercapacitors to reach a voltage of 2 V and an energy density four times higher than those of traditional sulfuric acid electrolytes.…”

Low-cost micro-supercapacitors using porous Ni/MnO2 entangled pillars and Na-based ionic liquids

“…The development of advanced solid-state electrolytes suitable for Na + charge storage with extended electrochemical stability window (ESW) is therefore an important challenge as energy stored is directly proportional to the square of the cell voltage. We have demonstrated in previous studies that a high pseudocapacitive effect of RuO2 with extended ESW could be obtained using protic ionic liquids [39,40]. Herein, we have synthesized and tested various innovative electrolytes using Na salts diluted in aprotic pyrrolidinium-and imidazolium-based ionic liquids solvents for MnO2.…”

Protic Poly(Ionic Liquid)/Ionic Liquid Ionogel Electrolyte Sharing the Same Ionic Species for Supercapacitors

“…Seenath et al fabricated SCC with ionogel composed of poly(vinylidene fluoride) (PVDF) and protic triethylammonium bis(trifluoromethanesulfonyl)imide ([TEAH][TFSI]), achieving 75% capacitance retention after 5000 charge−discharge cycles. 10 We have constructed ionogels via in situ copolymerization of acrylamide, 2-acrylamide-2methylpropanesulfonic acid, and divinylbenzene in hydrogen sulfate-based protic ILs. 11 Although the ionogels exhibited considerable conductivities at 120 °C, a 28% decrease in conductivity was observed after 60 h due to leaching of the ILs.…”

“…The as-prepared SCC gave a specific capacitance of 83 F g –1 , but the capacitance retention decreased quickly to 88% after 200 charge–discharge cycles owing likely to the phase separation of PMMA and the protic IL. Seenath et al fabricated SCC with ionogel composed of poly­(vinylidene fluoride) (PVDF) and protic triethylammonium bis­(trifluoromethanesulfonyl)­imide ([TEAH]­[TFSI]), achieving 75% capacitance retention after 5000 charge–discharge cycles . We have constructed ionogels via in situ copolymerization of acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, and divinylbenzene in hydrogen sulfate-based protic ILs .…”