Recent advances in graphene‐based materials for fuel cell applications

Su, Hanrui; Hu, Yun Hang

doi:10.1002/ese3.833

Cited by 123 publications

(89 citation statements)

References 162 publications

(327 reference statements)

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“…In this work, we have studied, through DFT-MD calculations, the analysis of flat (graphene) or curveted (CNT) carbon surface reactivities to proton and hydroxyl ions or hydroxyl ions, mixed or not with other entities, upon the presence of an electric field or not at the molecular scale. From all of our studies, we have shown a very strong affinity of the carbon wall, whatever its curvature, for the proton, with a notable modification of the hybridation of carbon atom as observed in recent literature [ 89 , 90 , 91 , 92 , 93 ]. The adsorption energy obtained in each case was about −4 eV, in agreement with the literature.…”

Section: Discussionsupporting

confidence: 82%

From Behavior of Water on Hydrophobic Graphene Surfaces to Ultra-Confinement of Water in Carbon Nanotubes

2021

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In recent years and with the achievement of nanotechnologies, the development of experiments based on carbon nanotubes has allowed to increase the ionic permeability and/or selectivity in nanodevices. However, this new technology opens the way to many questionable observations, to which theoretical work can answer using several approximations. One of them concerns the appearance of a negative charge on the carbon surface, when the latter is apparently neutral. Using first-principles density functional theory combined with molecular dynamics, we develop here several simulations on different systems in order to understand the reactivity of the carbon surface in low or ultra-high confinement. According to our calculations, there is high affinity of the carbon atom to the hydrogen ion in every situation, and to a lesser extent for the hydroxyl ion. The latter can only occur when the first hydrogen attack has been achieved. As a consequence, the functionalization of the carbon surface in the presence of an aqueous medium is activated by its protonation, then allowing the reactivity of the anion.

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Section: Discussionsupporting

confidence: 82%

From Behavior of Water on Hydrophobic Graphene Surfaces to Ultra-Confinement of Water in Carbon Nanotubes

2021

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“…The two main challenges of this technology are related to the elevated price of the catalyst material and the control of ORR kinetics, which have motivated the research on graphene hybrids and nanocomposites for reduction of production cost and to improve the performance. An extended review on the use of GRM in the different components of fuel cells has been recently reported by Su and Hu [ 74 ].…”

Section: Ceramic/graphene Composites Used In Energy Production and Storagementioning

confidence: 99%

Applications of Ceramic/Graphene Composites and Hybrids

et al. 2021

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Research activity on ceramic/graphene composites and hybrids has increased dramatically in the last decade. In this review, we provide an overview of recent contributions involving ceramics, graphene, and graphene-related materials (GRM, i.e., graphene oxide, reduced graphene oxide, and graphene nanoplatelets) with a primary focus on applications. We have adopted a broad scope of the term ceramics, therefore including some applications of GRM with certain metal oxides and cement-based matrices in the review. Applications of ceramic/graphene hybrids and composites cover many different areas, in particular, energy production and storage (batteries, supercapacitors, solar and fuel cells), energy harvesting, sensors and biosensors, electromagnetic interference shielding, biomaterials, thermal management (heat dissipation and heat conduction functions), engineering components, catalysts, etc. A section on ceramic/GRM composites processed by additive manufacturing methods is included due to their industrial potential and waste reduction capability. All these applications of ceramic/graphene composites and hybrids are listed and mentioned in the present review, ending with the authors’ outlook of those that seem most promising, based on the research efforts carried out in this field.

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“…Therefore, hydrocarbons (such as natural gas) may not be directly used for these fuel cells. In contrast, MCFCs and SOFCs are operated at high temperatures (650‐1000°C) 5,6a,6b . Many catalysts are very active for hydrocarbons at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…The high operating temperature of SOFCs provides several advantages 6a,6b,7,12 . SOFCs can be run on a variety of fuels including natural gas.…”

Section: Introductionmentioning

confidence: 99%

Progress in proton‐conducting oxides as electrolytes for low‐temperature solid oxide fuel cells: From materials to devices

Zhang

2021

Energy Science & Engineering

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123

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Among various types of alternative energy devices, solid oxide fuel cells (SOFCs) operating at low temperatures (300‐600°C) show the advantages for both stationary and mobile electricity production. Proton‐conducting oxides as electrolyte materials play a critical role in the low‐temperature SOFCs (LT‐SOFCs). This review summarizes progress in proton‐conducting solid oxide electrolytes for LT‐SOFCs from materials to devices, with emphases on (1) strategies that have been proposed to tune the structures and properties of proton‐conducting oxides and ceramics, (2) techniques that have been employed for improving the performance of the protonic ceramic‐based SOFCs (known as PCFCs), and (3) challenges and opportunities in the development of proton‐conducting electrolyte‐based PCFCs.

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Recent advances in graphene‐based materials for fuel cell applications

Cited by 123 publications

References 162 publications

From Behavior of Water on Hydrophobic Graphene Surfaces to Ultra-Confinement of Water in Carbon Nanotubes

From Behavior of Water on Hydrophobic Graphene Surfaces to Ultra-Confinement of Water in Carbon Nanotubes

Applications of Ceramic/Graphene Composites and Hybrids

Progress in proton‐conducting oxides as electrolytes for low‐temperature solid oxide fuel cells: From materials to devices

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