title: Highly conductive freestanding graphene films as anode current collectors for flexible lithium-ion batteries.
abstract: The electrodes in lithium-ion batteries (LIBs) are typically films that are arranged on metal foil current collectors with a thickness of several tens of μm. Here, we report on the preparation of a thick free-standing graphene film synthesized by CVD as an alternative to Cu foil as an anode current collector. As a model system, MoS2 anodes with a flower-like morphology were anchored onto the surface of the thick graphene film. A hybrid and binder free anode without a conventional metal current collector exhibited an excellent capacity value of around 580 mAh/g (@50 mA/g) and reasonable charge/discharge cyclability. The work presented here may stimulate the use of graphene films as replacements for conventional current collectors and additive free electrode in LIBs.
authors.affiliation: School of Electrical and Electronic Engineering, Yonsei University , Seoul, 120-749, Korea.
authors.forename: Kuldeep
authors.initials: K
authors.lastname: Rana
authors.forename: Jyoti
authors.initials: J
authors.lastname: Singh
authors.forename: Jeong-Taik
authors.initials: JT
authors.lastname: Lee
authors.forename: Jong Hyeok
authors.initials: JH
authors.lastname: Park
authors.forename: Jong-Hyun
authors.initials: JH
authors.lastname: Ahn