title: Hierarchical network architectures of carbon fiber paper supported cobalt oxide nanonet for high-capacity pseudocapacitors.
abstract: We present a high-capacity pseudocapacitor based on a hierarchical network architecture consisting of Co(3)O(4) nanowire network (nanonet) coated on a carbon fiber paper. With this tailored architecture, the electrode shows ideal capacitive behavior (rectangular shape of cyclic voltammograms) and large specific capacitance (1124 F/g) at high charge/discharge rate (25.34 A/g), still retaining ~94% of the capacitance at a much lower rate of 0.25 A/g. The much-improved capacity, rate capability, and cycling stability may be attributed to the unique hierarchical network structures, which improves electron/ion transport, enhances the kinetics of redox reactions, and facilitates facile stress relaxation during cycling.
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332-0245, USA.
authors.forename: Lei
authors.initials: L
authors.lastname: Yang
authors.forename: Shuang
authors.initials: S
authors.lastname: Cheng
authors.forename: Yong
authors.initials: Y
authors.lastname: Ding
authors.forename: Xingbao
authors.initials: X
authors.lastname: Zhu
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang
authors.forename: Meilin
authors.initials: M
authors.lastname: Liu
mesh_terms: D002244:Carbon / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D025802:Electric Capacitance; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation; D010087:Oxides / Q000737:chemistry*; D010209:Paper; D010316:Particle Size; D014025:Titanium / Q000737:chemistry*
chemical_list: D010087:Oxides; C009495:titanium dioxide; D003035:Cobalt; D002244:Carbon; D014025:Titanium; C060728:cobalt oxide