Carbon Nanowalls for oxygen reduction reaction in Bio Fuel Cells

Lee

Advanced Energy Materials

2017

152

103

In the pursuit of better electrode kinetics and mass transportation for electrochemical energy applications, 3D graphene‐based electrodes have been receiving increasing research interest. Distinguished from other kinds of 3D graphene structures, the well‐developed, vertically aligned graphene nanosheet arrays (VAGNAs) could be grown on a variety of substrates by plasma‐enhanced chemical vapor deposition (PECVD), forming a 3D interconnected structure with intimate contact with substrates and largely exposed edges, and easily accessible open surfaces of the graphene nanosheets. Ascribing to the combined superior inherent properties of graphene and the special structure configuration, e.g., large surface area, excellent electron transfer capability, outstanding mechanical strength, great chemical and thermal stabilities, and enhanced electrochemical activity, VAGNAs have demonstrated promising applications in supercapacitors, batteries, and fuel cell catalysts. This progress report provides a brief review on the nucleation and growth of VAGNAs, their growth mechanism and properties, and highlights the recent important progress in their electrochemical energy conversion and storage applications, in the views of their pros and cons in comparison with other 3D graphene‐based structures. Challenges and perspectives for future advance are discussed in the end.

Section: Electrochemical Energy Applicationsmentioning

confidence: 99%

Vertically Aligned Graphene Nanosheet Arrays: Synthesis, Properties and Applications in Electrochemical Energy Conversion and Storage

Lee

Advanced Energy Materials

2017

152

103

“…0.2 V (EOx) and ca. 0.17 V (ERed), 47 whilst for the 1,1ʹferrocenediboronic acid bis-pinacol ester at. 0.31 V (EOx) and ca.…”

Section: Dalton Transactions Accepted Manuscriptmentioning

confidence: 99%

Design of aD_3h-symmetry prismatic tris-(ferrocene-1,1′-diyl) molecular cage bearing boronate ester linkages

et al. 2022

“…GNFs have received significant attention over recent years due to their conductive, porous morphology, and electron rich edges, which make them well suited for a variety of fields including electron field emission, blackbody antireflective coatings, electrodes for sensing, − and energy conversion and storage (electrodes for fuel cells, , batteries supercapacitors, − and solar cells , ). However, their use as a nano-reinforcement interface is an almost unexplored terrain with only limited work reported so far − on radio-frequency plasma enhanced chemical vapor deposited (rf-PECVD) GNFs on CFs.…”

Section: Introductionmentioning

confidence: 99%

Radially Grown Graphene Nanoflakes on Carbon Fibers as Reinforcing Interface for Polymer Composites

Karakassides

Ganguly

Tsirka

et al. 2020

ACS Appl. Nano Mater.

The development of nanoscale reinforcements, which can tailor the interfacial strength and impart multiple functionalities on carbon fiber reinforced polymer (CFRP) composites, remains a challenge for their largescale adoption in diverse applications ranging from aerospace to transportation and construction industries. In this work radially aligned graphene nanoflakes (GNFs), grown directly on carbon fibers (CFs) via a simple one-step microwave plasma enhanced chemical vapor deposition method, without any catalyst, were used as a novel nano-reinforcement interface. A remarkable 28% enhancement in the tensile strength of the hybrid fibers was observed via singlefiber tensile strength tests, whereas the interfacial shear strength (IFSS) increased by 101.5%. Our results demonstrate that GNFs not only improve the interfacial strength between the GNFs and the epoxy resin but also enhance the in-plane mechanical strength of the CFsa well-known problem encountered with the direct growth of carbon nanotubes on CFs. In addition, GNFs provided embedded functionality via increased electrical conductivity (60.5% improvement for yarns and 16% for single fiber) and electrochemical capacitance (157% for yarns). This work indicates the potential of GNFs as an interphase for the simplified and costeffective production of stronger multifunctional CFRP composite materials.