title: Three-dimensional free-standing carbon nanotubes for a flexible lithium-ion battery anode.
abstract: Flexible lithium-ion batteries (LIBs) have received considerable attention as energy sources for wearable electronics. In recent years, much effort has been devoted to study light-weight, robust, and flexible electrodes. However, high areal and volumetric capacities need to be achieved for practical power and energy densities. In this paper, we report the use of three-dimensional (3D) free-standing carbon nanotubes (CNTs) as a current collector-free anode to demonstrate flexible LIBs with enhanced areal and volumetric capacities. High density CNTs grown on copper (Cu) mesh are transferred to a flexible graphene/polyethylene terephthalate  film and integrated into a flexible LIB. A fully flexible LIB cell integrated with the 3D CNT anode delivers a high areal capacity of 0.25 mAh cm(-2) at 0.1C and shows fairly consistent open circuit voltage under bending. These findings may provide significant advances in the application of flexible LIB based electronic devices.
authors: Department of Materials Science and Engineering, University of North Texas, North Texas Discovery Park 3940 North Elm St. Suite E-132, Denton, TX 76207, USA.
authors: Chiwon
authors: C
authors: Kang
authors: Eunho
authors: E
authors: Cha
authors: Rangasamy
authors: R
authors: Baskaran
authors: Wonbong
authors: W
authors: Choi