title: Reduced graphene oxide as a stable and high-capacity cathode material for Na-ion batteries.
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-1with a stable long cycling up to 1000 cycles. A discharge capacity of 134 mAh g-1is obtained at a high current density of 600 mA g-1, and the electrode recovers a capacity of 230 mAh g-1when the current density is reset to 15 mA g-1after 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.
authors.affiliation: Center for Energy Convergence Research, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea.|Korea University of Science and Technology, 217 Gajeong-ro Yuseong-gu, Daejeon 34113, Republic of Korea.
authors.forename: Ghulam
authors.initials: G
authors.lastname: Ali
authors.affiliation: Center for Energy Convergence Research, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea.
authors.forename: Asad
authors.initials: A
authors.lastname: Mehmood
authors.affiliation: Center for Energy Convergence Research, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea.|Korea University of Science and Technology, 217 Gajeong-ro Yuseong-gu, Daejeon 34113, Republic of Korea.
authors.forename: Heung Yong
authors.initials: HY
authors.lastname: Ha
authors.affiliation: School of Mechanical Engineering &SKKU Advanced Institute of Nano Technology, Sungkyunkwan University, 2066, Seobu-ro, Jangan-Gu, Gyeong Gi-do 16419, Republic of Korea.
authors.forename: Jaehoon
authors.initials: J
authors.lastname: Kim
authors.affiliation: Center for Energy Convergence Research, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea.|Korea University of Science and Technology, 217 Gajeong-ro Yuseong-gu, Daejeon 34113, Republic of Korea.
authors.forename: Kyung Yoon
authors.initials: KY
authors.lastname: Chung