title: Hydrous ruthenium oxide nanoparticles anchored to graphene and carbon nanotube hybrid foam for supercapacitors.
abstract: In real life applications, supercapacitors (SCs) often can only be used as part of a hybrid system together with other high energy storage devices due to their relatively lower energy density in comparison to other types of energy storage devices such as batteries and fuel cells. Increasing the energy density of SCs will have a huge impact on the development of future energy storage devices by broadening the area of application for SCs. Here, we report a simple and scalable way of preparing a three-dimensional (3D) sub-5 nm hydrous ruthenium oxide (RuO2) anchored graphene and CNT hybrid foam (RGM) architecture for high-performance supercapacitor electrodes. This RGM architecture demonstrates a novel graphene foam conformally covered with hybrid networks of RuO2 nanoparticles and anchored CNTs. SCs based on RGM show superior gravimetric and per-area capacitive performance (specific capacitance: 502.78 F g(-1), areal capacitance: 1.11 F cm(-2)) which leads to an exceptionally high energy density of 39.28 Wh kg(-1) and power density of 128.01 kW kg(-1). The electrochemical stability, excellent capacitive performance, and the ease of preparation suggest this RGM system is promising for future energy storage applications.
authors.affiliation: Materials Science and Engineering Program, Department of Mechanical Engineering, Department of Electrical Engineering, University of California, Riverside, CA 92521 (USA).
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.affiliation: Lawrence Livermore National Lab, Physical and Life Sciences Directorate, Livermore, CA, 94550 (USA).
authors.forename: Shirui
authors.initials: S
authors.lastname: Guo
authors.affiliation: Department of Chemistry, University of California, Riverside, CA 92521 (USA).
authors.forename: Ilkeun
authors.initials: I
authors.lastname: Lee
authors.affiliation: Department of Electrical Engineering, University of California, Riverside, CA 92521 (USA).
authors.forename: Kazi
authors.initials: K
authors.lastname: Ahmed
authors.affiliation: Materials Science and Engineering Program, Department of Mechanical Engineering, Department of Electrical Engineering, University of California, Riverside, CA 92521 (USA).
authors.forename: Jiebin
authors.initials: J
authors.lastname: Zhong
authors.affiliation: Materials Science and Engineering Program, Department of Mechanical Engineering, Department of Electrical Engineering, University of California, Riverside, CA 92521 (USA).
authors.forename: Zachary
authors.initials: Z
authors.lastname: Favors
authors.affiliation: Department of Chemistry, University of California, Riverside, CA 92521 (USA).
authors.forename: Francisco
authors.initials: F
authors.lastname: Zaera
authors.affiliation: Department of Electrical Engineering, University of California, Riverside, CA 92521 (USA).
authors.forename: Mihrimah
authors.initials: M
authors.lastname: Ozkan
authors.affiliation: Materials Science and Engineering Program, Department of Mechanical Engineering, Department of Electrical Engineering, University of California, Riverside, CA 92521 (USA).
authors.forename: Cengiz S
authors.initials: CS
authors.lastname: Ozkan
mesh_terms: D025802:Electric Capacitance; D011211:Electric Power Supplies; D006108:Graphite / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry*; D017975:Ruthenium Compounds / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; D017975:Ruthenium Compounds; D006108:Graphite; C027646:ruthenium tetraoxide