title: Scalable functionalized graphene nano-platelets as tunable cathodes for high-performance lithium rechargeable batteries.
abstract: High-performance and cost-effective rechargeable batteries are key to the success of electric vehicles and large-scale energy storage systems. Extensive research has focused on the development of (i) new high-energy electrodes that can store more lithium or (ii) high-power nano-structured electrodes hybridized with carbonaceous materials. However, the current status of lithium batteries based on redox reactions of heavy transition metals still remains far below the demands required for the proposed applications. Herein, we present a novel approach using tunable functional groups on graphene nano-platelets as redox centers. The electrode can deliver high capacity of ~250 mAh g⁻¹, power of ~20 kW kg⁻¹ in an acceptable cathode voltage range, and provide excellent cyclability up to thousands of repeated charge/discharge cycles. The simple, mass-scalable synthetic route for the functionalized graphene nano-platelets proposed in this work suggests that the graphene cathode can be a promising new class of electrode.
authors.affiliation: Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul 151-742 (Republic of Korea).
authors.forename: Haegyeom
authors.initials: H
authors.lastname: Kim
authors.forename: Hee-Dae
authors.initials: HD
authors.lastname: Lim
authors.forename: Sung-Wook
authors.initials: SW
authors.lastname: Kim
authors.forename: Jihyun
authors.initials: J
authors.lastname: Hong
authors.forename: Dong-Hwa
authors.initials: DH
authors.lastname: Seo
authors.forename: Dae-Chul
authors.initials: DC
authors.lastname: Kim
authors.forename: Seokwoo
authors.initials: S
authors.lastname: Jeon
authors.forename: Sungjin
authors.initials: S
authors.lastname: Park
authors.forename: Kisuk
authors.initials: K
authors.lastname: Kang