title: Three-dimensional thin film for lithium-ion batteries and supercapacitors.
abstract: Three-dimensional heterogeneously nanostructured thin-film electrodes were fabricated by using Ta2O5 nanotubes as a framework to support carbon-onion-coated Fe2O3 nanoparticles along the surface of the nanotubes. Carbon onion layers function as microelectrodes to separate the two different metal oxides and form a nanoscale 3-D sandwich structure. In this way, space-charge layers were formed at the phase boundaries, and it provides additional energy storage by charge separation. These 3-D nanostructured thin films deliver both excellent Li-ion battery properties (stabilized at 800 mAh cm(–3)) and supercapacitor (up to 18.2 mF cm(–2)) performance owing to the synergistic effects of the heterogeneous structure. Thus, Li-ion batteries and supercapacitors are successfully assembled into the same electrode, which is promising for next generation hybrid energy storage and delivery devices.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Peng
authors.forename: Gunuk
authors.initials: G
authors.lastname: Wang
authors.forename: Gedeng
authors.initials: G
authors.lastname: Ruan
authors.forename: Xiujun
authors.initials: X
authors.lastname: Fan
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.forename: Huilong
authors.initials: H
authors.lastname: Fei
authors.forename: Robert H
authors.initials: RH
authors.lastname: Hauge
authors.forename: James M
authors.initials: JM
authors.lastname: Tour