This work describes Q2 the development Q3 and performance of a symmetric micro-supercapacitor made of nanostructured electrodes based on silicon nanowires (SiNWs) deposited using chemical vapor deposition (CVD) on silicon substrates. The performance of the SiNWs microsupercapacitor employing an aprotic ionic liquid (N-methyl-N-propylpyrrolidinium bis(trifluoromethylsulfonyl)imide) (PYR 13 TFSI) as an electrolyte was able to deliver a maximal power density of 182 mW cm À 2 and a specific energy of 190 μJ cm À 2 operating at a wide cell voltage of 4 V with a quasi-ideal capacitive behavior. The lifetime of the device exhibited a remarkable electrochemical stability retaining 75% of the initial capacitance after several million galvanostatic charge-discharge cycles at a high current density of 1 mA cm À 2. Furthermore,

The development of a novel hybrid symmetric micro-supercapacitor based on poly(3,4-ethylenedioxythiophene) coated silicon nanowires using an ionic liquid PYR13TFSI as an electrolyte has been demonstrated.

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