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Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) Bengaluru 
Electrolyte Comprising A Supramolecular Nanofiber and Microsupercapacitor 
Giridhar Udapi Rao Kulkarni, Subi Jacob George, Muralli Gedda, Umesha Mogera 
Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) Bengaluru 
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Applied - 2015-10-01 
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Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) Bengaluru 
Making all solid state planar micro-supercapacitors with high power and energy densities has become big challenge for to its demand for many energy related applications. Carbon based planar all solid state supercapacitors (ASSS) for on chip energy has gained immense attention recently due to its high power densities larger than electrolytic capacitors. Lot of efforts are going on to increase the energy density of these planar supercapacitors by increasing the electrochemical voltage window of the electrolyte. Easily processable aqueous solid electrolyte gel PVA/H2SO4 suffer from low working voltage window. Ionic liquid based solid electrolytes are being used which has higher electrochemical voltage window, however it is expensive, needs N2/Ar atmosphere for preparation and highly moisture sensitive, thus needs encapsulation for ambient working conditions. Here we use solution synthesized supramolecular 1D nanofibres as solid electrolyte to fabricate planar micro-supercapacitors with high power density and high energy density values. This electrolyte is inexpensive compared to commercially available ionic liquids with similar operating window. Very low quantity of 1 μL of 1mM aqueous solution dries up leaving behind nanofibres on the electrodes. Charges arranged in 1D arrangement not only empower very high storing capacity to the device also avoid the nanostructuring of the electrodes. It is also been found to be ideal for very high humid conditions. Flexible devices were made which found to be invariant even for extreme bending of the device. Moreover no encapsulation is required for the device as the electrolyte is ambient stable and repairable. 

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