Structure and electrical properties of YSZ-rGO composites and YSZ ceramics, obtained from composite powder

Kurapova, Olga Yu.; Glukharev, Artem G.; Glumov, O. V.; Kurapov, Mikhail; Boltynjuk, Evgeniy; Конаков, В. Г.

doi:10.1016/j.electacta.2019.134573

Cited by 25 publications

(25 citation statements)

References 39 publications

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“…Excellent thermal stability of graphene can allow ones to expect its promising achievement in high‐temperature MCFCs or SOFCs. Recently, graphene nanoplatelets or rGO were incorporated into yttria‐stabilized zirconia (YSZ) as alternative interconnectors in SOFC, demonstrating the improved thermal conductivity, cracking resistance, and ionic conductivity 159 . This finding would stimulate further R&D efforts in the application of graphene‐based materials for high‐temperature fuel cells.…”

Section: Discussionmentioning

confidence: 98%

Recent advances in graphene‐based materials for fuel cell applications

2020

Energy Science & Engineering

109

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The unique chemical and physical properties of graphene and its derivatives (graphene oxide, heteroatom‐doped graphene, and functionalized graphene) have stimulated tremendous efforts and made significant progress in fuel cell applications. This review focuses on the latest advances in the use of graphene‐based materials in electrodes, electrolytes, and bipolar plates for fuel cells. The understanding of structure‐activity relationships of metal‐free heteroatom‐doped graphene and graphene‐supported catalysts was highlighted. The performances and advantages of graphene‐based materials in membranes and bipolar plates were summarized. We also outlined the challenges and perspectives in using graphene‐based materials for fuel cell applications.

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Section: Discussionmentioning

confidence: 98%

Recent advances in graphene‐based materials for fuel cell applications

2020

Energy Science & Engineering

109

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“…The samples showed stability in inert and reducing atmospheres at temperatures as high as 600 °C and 800 °C, respectively. Following this line, Kurapova et al [ 95 ] fabricated c-YSZ/rGO composites showing important grain size refinement and electrical conductivity of 10 S⋅m −1 at 1000 K. Gómez-Gómez et al [ 96 ] suggested that these composites could be used as suitable interconnects by proving important increases of the thermal and mechanical properties by the GNP addition, in particular, for the 20 vol.% GNP composite six times higher thermal conductivity (17 W·m −1 ·K −1 ) than monolithic materials, and 78% increment in fracture toughness with rising R-curve behavior was demonstrated for the 11 vol.% GNP.…”

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

confidence: 96%

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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“…The position of G peak in Sample 2 spectrum is slightly shifted comparing to spectrum obtained for pure rGO (Fig. S1, Supplementary Material) [15] and with the results for rGO-Ni composites obtained by SPS [8]: 1587 cm −1 (Sample 2) vs 1575 cm −1 for pure rGO and 1580 cm −1 for Ni-Gr composites [8,15]. Since G band is due to ordered state of sp 2 carbon lattice, the shift observed, likely, indicates the interaction of rGO with the nickel matrix.…”

Section: Resultsmentioning

confidence: 83%

“…The increase of rGO contents in the initial powder mixture up to 1 wt.% results in microstructural inhomogeneity and severe cracks formation. In parallel with [15,18] two possible mechanisms may cause the cracking: (i) difference of thermal expansion coefficient of graphene and nickel matrix may result in the lattice distortion on the interfaces, voids formation during heating-cooling step; (ii) Gr agglomerates hinder the composite powder compaction thus increasing the distance between Ni powder particles and decreasing powder sintering ability or limiting material matrix flow. Both factors induce pores / voids formation in composite and, thus, the cracking.…”

Section: Resultsmentioning

confidence: 99%

The effect of reduced graphene oxide (rGO) and thermally exfoliated graphite (TEFG) on the mechanical properties of “nickel-graphene” composites

et al. 2020

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Nickel matrix composites are important materials for various engineering applications. The present paper describes the fabrication of bulk graphene-nickel (Gr-Ni) and reduced graphene oxide-nickel (rGO-Ni) composites by powder metallurgy technique using various graphene sources, namely, thermally exfoliated graphite (TEFG) and reduced graphene oxide (rGO) and the investigation of the mechanical properties of the composites. Homogeneous distribution of graphene derivatives in the composite matrices was confirmed for all compositions by XRD and Raman spectroscopy. It was proved that different Gr sources in the initial powder mixtures result in some different graphene derivatives type in the composites produced. Nevertheless, scanning electron microscopy data demonstrated that the microstructure of the samples produced using the different graphene sources is rather similar. It was shown that the mechanical properties of the composites are very sensitive to the type of graphene derivative chosen at low additive contents. TEFG addition results in the decreased values of tensile strength, ductility, and elongation for all compositions. It was shown that 0.1 wt.% of rGO addition resulted in the 34 % elongation-to-failure increase with no change in the UTS value of composite. The 0.1 wt.% rGO-Ni composite showed the increased elongation and the tensile strength value comparable to pure nickel specimen. Fractography tests revealed the difference in the mechanical behaviour of rGO-Ni and Gr-Ni composites.

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Structure and electrical properties of YSZ-rGO composites and YSZ ceramics, obtained from composite powder

Cited by 25 publications

References 39 publications

Recent advances in graphene‐based materials for fuel cell applications

Recent advances in graphene‐based materials for fuel cell applications

Applications of Ceramic/Graphene Composites and Hybrids

The effect of reduced graphene oxide (rGO) and thermally exfoliated graphite (TEFG) on the mechanical properties of “nickel-graphene” composites

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