title: PolyHIPE Derived Freestanding 3D Carbon Foam for Cobalt Hydroxide Nanorods Based High Performance Supercapacitor.
abstract: The current paper describes enhanced electrochemical capacitive performance of chemically grown Cobalt hydroxide (Co(OH)2) nanorods (NRs) decorated porous three dimensional graphitic carbon foam (Co(OH)2/3D GCF) as a supercapacitor electrode. Freestanding 3D porous GCF is prepared by carbonizing, high internal phase emulsion (HIPE) polymerized styrene and divinylbenzene. The PolyHIPE was sulfonated and carbonized at temperature up to 850 °C to obtain graphitic 3D carbon foam with high surface area (389 m2g-1) having open voids (14 μm) interconnected by windows (4 μm) in monolithic form. Moreover, entangled Co(OH)2NRs are anchored on 3D GCF electrodes by using a facile chemical bath deposition (CBD) method. The wide porous structure with high specific surface area (520 m2g-1) access offered by the interconnected 3D GCF along with Co(OH)2NRs morphology, displays ultrahigh specific capacitance, specific energy and power. The Co(OH)2/3D GCF electrode exhibits maximum specific capacitance about ~1235 F g-1at ~1 A g-1charge-discharge current density, in 1 M aqueous KOH solution. These results endorse potential applicability of Co(OH)2/3D GCF electrode in supercapacitors and signifies that, the porous GCF is a proficient 3D freestanding framework for loading pseudocapacitive nanostructured materials.
authors.affiliation: Nano ElectroMechanical Device Laboratory, School of Mechanical Engineering, Yonsei University, Seoul 120-749, Republic of Korea.
authors.forename: Umakant M
authors.initials: UM
authors.lastname: Patil
authors.affiliation: Electronic Material Laboratory, Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, Republic of Korea.
authors.forename: Ravindra V
authors.initials: RV
authors.lastname: Ghorpade
authors.affiliation: Nano ElectroMechanical Device Laboratory, School of Mechanical Engineering, Yonsei University, Seoul 120-749, Republic of Korea.
authors.forename: Min Sik
authors.initials: MS
authors.lastname: Nam
authors.affiliation: Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune-411008, India.
authors.forename: Archana C
authors.initials: AC
authors.lastname: Nalawade
authors.affiliation: Electronic Material Laboratory, Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, Republic of Korea.
authors.forename: Sangrae
authors.initials: S
authors.lastname: Lee
authors.affiliation: Electronic Material Laboratory, Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, Republic of Korea.
authors.forename: Haksoo
authors.initials: H
authors.lastname: Han
authors.affiliation: Nano ElectroMechanical Device Laboratory, School of Mechanical Engineering, Yonsei University, Seoul 120-749, Republic of Korea.
authors.forename: Seong Chan
authors.initials: SC
authors.lastname: Jun