New electrolyte mixture of propylene carbonate and butyltrimethylammonium bis(trifluoromethylsulfonyl)imide (N1114 TFSI) for high performance silicon nanowire (SiNW)-based supercapacitor applications

Abstract

New electrolyte mixture of propylene carbonate and butyltrimethylammonium bis(trifluoromethylsulfonyl)imide (N 1114 TFSI) for high performance silicon nanowire (SiNW)-based supercapacitor applications. Electrochimica Acta, Elsevier, 2017, 254, pp.Keywords: supercapacitors ionic liquid electrolyte mixture temperature A B S T R A C TThe use of a mixture of propylene carbonate (PC) and N 1114 TFSI ionic liquid (50:50% w.t) has been investigated as an optimal electrolyte for symmetric micro-supercapacitors based on SiNWs using a large and stable cell voltage of 3.5 V. The device showed an areal capacitance of 150 mF cm À2 , an energy density of 1 mJ cm À2 and a power density of 16 mW cm À2 maintaining an outstanding cycling stability after 3Á10 6 galvanostatic charge-discharge cycles at room temperature. Such properties were comparable to those obtained using the pure ionic liquid. Additionally, the excellent electrochemical performances reported in this study reflect the potential of such mixture to be employed as a promising electrolyte in wide operating temperatures ranging from 0 to 80 C at large electrochemical windows.

Deciphering the Influence of Electrolytes on the Energy Storage Mechanism of Vertically-Oriented Graphene Nanosheet Electrodes by Using Advanced Electrogravimetric Methods

“…An interconnected non-agglomerated porous network of graphene in a vertical orientation is observed. A detailed structural, morphological and physical characterization of VOGNs based on X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, transmission electron microscopy (TEM) or 4-probe conductivity techniques were already published in our previous work [51]. Consequently, a brief morphological characterization based exclusively on SEM has been reported in this work.…”

“…Two PC solutions containing 0.5 M TBAClO 4 and 0.5 M LiClO 4 , respectively, and a 50:50 wt% solution of PC and N 1114 TFSI were employed as the corresponding electrolytes. The optimal PC/N 1114 TFSI mixed solution was chosen based on its excellent electrochemical performance for supercapacitor applications as reported previously [51]. Cyclic voltammetry (CV) measurements were conducted in a potential window from −1.5 to 1 V (∆V: 2.5 V) under a scan rate of 100 mV s −1 for each experiment.…”

Ionic Liquid-Based Gels for Applications in Electrochemical Energy Storage and Conversion Devices: A Review of Recent Progress and Future Prospects

“…In 2017, Lé et al utilized an IL-based gel composed of propylene carbonate (PC) and butyltrimethylammonium bis(trifluoromethylsulfonyl)imide (N 1114 TFSI) IL (50:50%wt) as an optimal electrolyte for symmetric MSCs based on silicon nanowire (SiNW) using a large and stable cell voltage of 3.5 V. After 3 × 10 6 galvanostatic charge–discharge cycles at room temperature, the capacitance of the MSCs was reported to be 150 mF cm −2 [ 120 ].…”

Halide Salt‐Catalyzed Crosslinked Polyurethanes for Supercapacitor Gel Electrolyte Applications

“…Cyclic voltammetry (CV) (Figure 3A) and galvanostatic charge‐discharge (GCD) (Figure 3B, S7) were performed to show the stability of the gel electrolyte through 5000 charge‐discharge cycles. It is important to note that unlike other ionic‐liquid‐based gel electrolytes, this PEO‐PPO system does not utilize any form of flammable organic solvents like acetonitrile (ACN) or propylene carbonate (PC) < that are commonly used in SCs [36] . In addition, the use of a non‐toxic catalyst in the formation of the crosslinked system makes this a safe and environmentally friendly system.…”