title: Electrochemical Supercapacitor Electrodes from Sponge-like Graphene Nanoarchitectures with Ultrahigh Power Density.
abstract: We employed a microwave synthesis process of cobalt phthalocyanine molecules templated by acid-functionalized multiwalled carbon nanotubes to create three-dimensional sponge-like graphene nanoarchitectures suited for ionic liquid-based electrochemical capacitor electrodes that operate at very high scan rates. The sequential "bottom-up" molecular synthesis and subsequent carbonization process took less than 20 min to complete. The 3D nanoarchitectures are able to deliver an energy density of 7.1 W·h kg(-1) even at an extra high power density of 48 000 W kg(-1). In addition, the ionic liquid supercapacitor based on this material works very well at room temperature due to its fully opened structures, which is ideal for the high-power energy application requiring more tolerance to temperature variation. Moreover, the structures are stable in both ionic liquids and 1 M H2SO4, retaining 90 and 98% capacitance after 10 000 cycles, respectively.
authors: †Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2 V4, Canada.|‡National Institute for Nanotechnology (NINT), National Research Council of Canada, Edmonton, Alberta T6G 2M9, Canada.
authors: Zhanwei
authors: Z
authors: Xu
authors: †Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2 V4, Canada.|‡National Institute for Nanotechnology (NINT), National Research Council of Canada, Edmonton, Alberta T6G 2M9, Canada.
authors: Zhi
authors: Z
authors: Li
authors: †Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2 V4, Canada.|‡National Institute for Nanotechnology (NINT), National Research Council of Canada, Edmonton, Alberta T6G 2M9, Canada.
authors: Chris M B
authors: CM
authors: Holt
authors: †Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2 V4, Canada.|‡National Institute for Nanotechnology (NINT), National Research Council of Canada, Edmonton, Alberta T6G 2M9, Canada.
authors: Xuehai
authors: X
authors: Tan
authors: †Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2 V4, Canada.|‡National Institute for Nanotechnology (NINT), National Research Council of Canada, Edmonton, Alberta T6G 2M9, Canada.
authors: Huanlei
authors: H
authors: Wang
authors: †Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2 V4, Canada.|‡National Institute for Nanotechnology (NINT), National Research Council of Canada, Edmonton, Alberta T6G 2M9, Canada.
authors: Babak Shalchi
authors: BS
authors: Amirkhiz
authors: †Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2 V4, Canada.|‡National Institute for Nanotechnology (NINT), National Research Council of Canada, Edmonton, Alberta T6G 2M9, Canada.
authors: Tyler
authors: T
authors: Stephenson
authors: †Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2 V4, Canada.|‡National Institute for Nanotechnology (NINT), National Research Council of Canada, Edmonton, Alberta T6G 2M9, Canada.
authors: David
authors: D
authors: Mitlin
keywords: carbon nanotube; electrochemical capacitor; graphene; microwave; three-dimensional