Aradilla, D.D.AradillaGao, F.F.GaoLewes-Malandrakis, G.G.Lewes-MalandrakisMüller-Sebert, W.W.Müller-SebertGaboriau, D.D.GaboriauGentile, P.P.GentileIliev, B.B.IlievSchubert, T.T.SchubertSadki, S.S.SadkiBidan, G.G.BidanNebel, C.E.C.E.Nebel2022-03-052022-03-052016https://publica.fraunhofer.de/handle/publica/24323710.1016/j.elecom.2015.12.0082-s2.0-84951851303Silicon nanowires (SiNWs) were successfully coated by uniform, adherent and homogenous ultra-thin crystalline diamond films through microwave enhanced chemical vapor deposition (MWCVD). The as-grown functionalized nanowires were employed as electrodes in a symmetric micro-supercapacitor (MSC) using a protic ionic liquid electrolyte [triethylammonium bis(trifluoromethylsulfonyl)imide; Et3NH TFSI]. The electrochemical performance of the device delivered a specific capacitance of 1.5 mF cm(-2) and a power density of 25 mW cm(-2) using an enlarged cell voltage of 4 V. Furthermore, a remarkable cycling stability was evaluated after 1 . 10(6) galvanostatic cycles at a high current density of 10 mA cm(-2) with an excellent capacitive behavior. These results confirm that diamond-coated SiNW micro-supercapacitors exhibit very promising performances dealing with MSCs based on CVD-grown SiNWs.ensupercapacitorionic liquiddiamondsilicon nanowires541journal article