Abstract
We report the feasibility of using reduced graphene oxide (RGO) as a cost-effective and high performance cathode material for sodium-ion batteries (SIBs). Graphene oxide is synthesized by a modified Hummers’ method and reduced using a solid-state microwave irradiation method. The RGO electrode delivers an exceptionally stable discharge capacity of 240 mAh g−1 with a stable long cycling up to 1000 cycles. A discharge capacity of 134 mAh g−1 is obtained at a high current density of 600 mA g−1, and the electrode recovers a capacity of 230 mAh g−1 when the current density is reset to 15 mA g−1 after deep cycling, thus demonstrating the excellent stability of the electrode with sodium de/intercalation. The successful use of the RGO electrode demonstrated in this study is expected to facilitate the emergence of low-cost and sustainable carbon-based materials for SIB cathode applications.
Highlights
We report the feasibility of using reduced graphene oxide (RGO) as a cost-effective and high performance cathode material for sodium-ion batteries (SIBs)
Sodium-ion batteries (SIBs) have emerged as a potential candidate for large-scale energy storage systems (ESS) because of their advantages of a low production cost and evenly distributed global sodium reserves compared to lithium[2,3,4,5]
The nanosheets prepared by a solid-state microwave irradiation method are connected to a vermiculite morphology that is analogous to the thermal exfoliation of graphene oxide[42]
Summary
We report the feasibility of using reduced graphene oxide (RGO) as a cost-effective and high performance cathode material for sodium-ion batteries (SIBs). Most of the work on graphene has mainly focused on its application as an anode material for LIBs. The approach to functionalizing the graphene oxide (GO) with the alkali-metal-ions have exhibited reasonable sodium storage capacity as anodes for SIBs with long cycle life of upto 600 cycles at a high current density of 1 A g−1 37. The RGO cathode shows a high sodium storage capacity of 240 mAh g−1 at a current density of 30 mA g−1 over 1000 cycles, which indicates the excellent stability of this material
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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.
