title: ZrO2-SiO2 nanosheets with ultrasmall WO3 nanoparticles and their enhanced pseudocapacitance and stability.
abstract: We report on the first synthesis of porous ZrO2-SiO2 sheets with well-defined ultrasmall WO3 nanoparticles for energy storage performance. In our system, for improving the surface deterioration of electrode, we use the ZrO2-SiO2 sheets using graphene oxide as a template to access electrode substrate. The synthesized electrode with about 20 nm thickness and about 10 nm pores, has a maximum value of 313 F/g at current density of 1 A/g and a minimum value of 160 F/g at current density of 30 A/g in the specific capacitance. In addition, over 90% of its initial specific capacitance is retained when they are cycled up to 2500 cycles.
authors.affiliation: Center of Molecular Science and Technology, ⊥Division of Energy Systems Research, and §Department of Molecular Science and Technology, Ajou University , Suwon 443-749, Korea.
authors.forename: Gyoung Hwa
authors.initials: GH
authors.lastname: Jeong
authors.forename: Hae-Min
authors.initials: HM
authors.lastname: Lee
authors.forename: Ji-goo
authors.initials: JG
authors.lastname: Kang
authors.forename: Heewoong
authors.initials: H
authors.lastname: Lee
authors.forename: Chang-Koo
authors.initials: CK
authors.lastname: Kim
authors.forename: Jae-Hyeok
authors.initials: JH
authors.lastname: Lee
authors.forename: Jae-Ho
authors.initials: JH
authors.lastname: Kim
authors.forename: Sang-Wook
authors.initials: SW
authors.lastname: Kim
keywords: WO3 nanoparticle; porous sheets; stability; supercapacitor