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Nano energy v.31, 2017년, pp.386 - 392   SCIE
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Highly compressible, binderless and ultrathick holey graphene-based electrode architectures

Lacey, Steven D. (Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-4111, USA ) ; Walsh, Evan D. (NASA Internships Fellowships Scholarships (NIFS) Program, NASA Langley Research Center, Hampton, VA 23681-2199, USA ) ; Hitz, Emily (Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-4111, USA ) ; Dai, Jiaqi (Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-4111, USA ) ; Connell, John W. (Advanced Materials and Processing Branch, NASA Langley Research Center, Mail Stop 226, Hampton, VA 23681-2199, USA ) ; Hu, Liangbing (Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-4111, USA ) ; Lin, Yi (National Institute of Aerospace, 100 Exploration Way, Hampton, VA 23666-6147, USA ) ;
  • 초록  

    Abstract Graphene is a renowned material due to its unique structural characteristics and chemical properties. By heating graphene powder in an open-ended tube furnace, a highly compressible carbon material, holey graphene (hG), can be created with controlled porosity and be further decorated with nanosized catalysts using a solvent-free procedure to impart functionality and electrocatalytic activity. For the first time, we demonstrate an additive-free, dry press method to compression mold hG-based materials into ultrathick, binderless and high mass loading architectures using a hydraulic press at room temperature. The compressibility and structure of the hG allows for fabrication of unique ultrathick electrode architectures (mixed, sandwich, and double-decker) using both hG and catalyst/hG nanohybrid materials. These high mass loading, mixed and stacked hG electrode architectures are the first of their kind and are successfully demonstrated as lithium-oxygen (Li-O 2 ) cathodes. The scalable, binderless, and solventless dry press method and novel additive-free electrode architectures presented here greatly advance both electrode fabrication options, and open up new electrode designs for potential energy storage advancements. Highlights hG is a highly compressible and readily moldable porous carbon nanomaterial. A hydraulic press compresses hG materials into high mass loading electrodes. Manipulation of catalyst placement enables advanced electrode architectures. This scalable dry press method processes carbon-based materials without additives. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Holey graphene .   Mesoporous carbon .   Compressible graphene .   Scalable fabrication .   Ultrathick electrode architecture .   Lithium-oxygen battery.  

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