Three-dimensional free-standing carbon nanotubes for a flexible lithium-ion battery anode. (10th February 2016)

• Record Type: Journal Article
• Authors: Kang, Chiwon; Cha, Eunho; Baskaran, Rangasamy; Choi, Wonbong
• Is Part Of: Nanotechnology. Volume 27:Number 10(2016)
• Publication Date: 2016-02-10
• Subjects: three-dimensional free-standing carbon nanotubes -- flexible lithium-ion batteries -- areal and volumetric densities -- areal and volumetric capacities -- catalytic thermal chemical vapor deposition -- graphene; 82.47.Aa -- 61.48.De -- 81.05.ue -- 82.45.Fk; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/0957-4484/27/10/105402
• Languages: English
• ISSNs: 0957-4484

Abstract

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.