Abstract
In this paper we report the use of triethylene glycol reduced graphene oxide (TRGO) as an electrode material for non-aqueous energy storage devices such as supercapacitors and Li-ion batteries. TRGO based non–aqueous symmetric supercapacitor is constructed and shown to deliver maximum energy and power densities of 60.4 Wh kg–1 and 0.15 kW kg–1, respectively. More importantly, symmetric supercapacitor shows an extraordinary cycleability (5000 cycles) with over 80% of capacitance retention. In addition, Li-storage properties of TRGO are also evaluated in half-cell configuration (Li/TRGO) and shown to deliver a reversible capacity of∼705 mAh g–1 with good cycleability at constant current density of 37 mA g–1. This result clearly suggests that green-synthesized graphene can be effectively used as a prospective electrode material for non-aqueous energy storage systems such as Li-ion batteries and supercapacitors.
Highlights
In this work we have evaluated the performance of triethylene glycol reduced graphene oxide (TRGO) nanosheets[29] for non-aqueous energy storage applications and show that such sheets exhibit excellent performance in these application domains
Additional HR-TEM images are shown in the (ESI) FIG S2.30 The thickness of the as-prepared TRGO was observed by atomic force microscopy (AFM)
Graphene nanosheets prepared by eco-friendly trigol assisted reduction process are evaluated for charge storage applications in non-aqueous media
Summary
In addition to the supercapacitive properties of graphene, the possibility of using the same as anode material for LIBs has been explored in half-cell configurations.[23,24,25] Generally, high energy density LIB requires good performance anodes with capacity more than commercially available graphitic anodes (∼372 mAh g–1). Due to the unique two dimensional structures of graphene nanosheets capable of adsorbing Li+ ions on both sides turbostatically, it provides a maximum reversible capacity of ∼744 mAh g–1.17,24 Further, graphitic anodes are involved in Liinsertion/extraction reaction, and under high current operations such anodes endure the problem of. In this work we have evaluated the performance of triethylene glycol reduced graphene oxide (TRGO) nanosheets[29] for non-aqueous energy storage applications and show that such sheets exhibit excellent performance in these application domains
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
