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Flexible Hybrid Paper Made of Monolayer Co 3 O 4 Microsphere Arrays on rGO/CNTs and Their Application in Electrochemical Capacitors
Author(s) -
Yuan Changzhou,
Yang Long,
Hou Linrui,
Li Jiaoyang,
Sun Yaxin,
Zhang Xiaogang,
Shen Laifa,
Lu Xiangjun,
Xiong Shenglin,
Lou Xiong Wen David
Publication year - 2012
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201102860
Subject(s) - materials science , capacitor , electrode , electrochemistry , graphene , carbon nanotube , monolayer , capacitance , nanotechnology , substrate (aquarium) , supercapacitor , oxide , hydrothermal circulation , chemical engineering , voltage , chemistry , physics , oceanography , quantum mechanics , geology , engineering , metallurgy
A facile one‐step hydrothermal method is developed for large‐scale production of well‐designed flexible and free‐standing Co 3 O 4 /reduced graphene oxide (rGO)/carbon nanotubes (CNTs) hybrid paper as an electrode for electrochemical capacitors. Densely packed unique Co 3 O 4 monolayer microsphere arrays uniformly cover the surface of the rGO/CNTs film. The alkaline hydrothermal treatment leads to not only the deposition of Co 3 O 4 microspheres array, but also the reduction of the GO sheets at the same time. The unique hybrid paper is evaluated as an electrode for electrochemical capacitors without any ancillary materials. It is found that the obtained hybrid flexible paper, composed of Co 3 O 4 microsphere array anchored to the underling conductive rGO/CNTs substrate with robust adhesion, is able to deliver high specific capacitance with excellent electrochemical stability even at high current densities, suggesting its promising application as an efficient electrode material for electrochemical capacitors.