New architecture of 3D graphene with enhanced properties obtained by cold rolling

Kondapalli, Vamsi Krishna Reddy; Zhang, Guangqi; Zhang, Yu; Khosravifar, Mahnoosh; Brittingham, Kyle; Phan, Nhat Anh Nguyen; Yarmolenko, Sergey; Bahk, Je-Hyeong; Shanov, Vesselin

doi:10.1016/j.carbon.2023.03.004

Cited by 7 publications

(9 citation statements)

References 56 publications

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“…3DGS was compressed between two SS shims at a 100 μm rolling gap followed by dipping in an ethanol bath to separate the compressed 3DGS called here (C3DGS). The latter demonstrated greater tensile strength due to the high alignment of graphene flakes as discussed in detail elsewhere . The blending of 3DGS with CV by cold rolling slightly increased the strength of the resultant material compared with CV alone (from 3.08 to 3.3 MPa).…”

Section: Resultsmentioning

confidence: 83%

“…A similar rolling compression procedure, as described in our publication was implemented here to create the 3DGS-CV composites . MSK-HRP-01 electric hot rolling press from MTI Corporation was used for rolling compression.…”

Section: Resultsmentioning

confidence: 99%

“…In our recent work, we demonstrated the ability of our CVD-synthesized 3D graphene to accommodate stress via extrusion. 3D graphene behaved like a bulk material and demonstrated no cracks or failure under compressive stress . Based on the found extrusion property theoretically, 3D graphene can be joined with any porous material by cold rolling together without the requirement for a high temperature or chemical processing.…”

Section: Introductionmentioning

confidence: 91%

“…A similar rolling compression procedure, as described in our publication was implemented here to create the 3DGS-CV composites. 18 MSK-HRP-01 electric hot rolling press from MTI Corporation was used for rolling compression. 3DGS and CV were arranged in various orientations between two kitchen baking sheets (50 μm thick each) and stainless steel (SS) shims of 50 μm thick each and were cold rolled only once at various rolling gaps.…”

Section: Materials Characterization Of 3dgs-cv Compositesmentioning

confidence: 99%

“…3D graphene behaved like a bulk material and demonstrated no cracks or failure under compressive stress. 18 Based on the found extrusion property theoretically, 3D graphene can be joined with any porous material by cold rolling together without the requirement for a high temperature or chemical processing. In this work, we test this hypothesis by joining a CVD-synthesized 3D graphene sheet (3DGS) with a highly porous commercial carbon veil (CV) via simple cold rolling.…”

Section: Introductionmentioning

confidence: 99%

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Three-Dimensional Graphene Sheet-Carbon Veil Thermoelectric Composite with Microinterfaces for Energy Applications

Kondapalli,

Akinboye,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Over the years, various processing techniques have been explored to synthesize three-dimensional graphene (3DG) composites with tunable properties for advanced applications. In this work, we have demonstrated a new procedure to join a 3D graphene sheet (3DGS) synthesized by chemical vapor deposition (CVD) with a commercially available carbon veil (CV) via cold rolling to create 3DGS-CV composites. Characterization techniques such as scanning electron microscopy (SEM), Raman mapping, X-ray diffraction (XRD), electrical resistance, tensile strength, and Seebeck coefficient measurements were performed to understand various properties of the 3DGS-CV composite. Extrusion of 3DGS into the pores of CV with multiple microinterfaces between 3DGS and the graphitic fibers of CV was observed, which was facilitated by cold rolling. The extruded 3D graphene revealed pristine-like behavior with no change in the shape of the Raman 2D peak and Seebeck coefficient. Thermoelectric (TE) power generation and photothermoelectric responses have been demonstrated with in-plane TE devices of various designs made of p-type 3DGS and n-type CV couples yielding a Seebeck coefficient of 32.5 μV K–1. Unlike various TE materials, 3DGS, CV, and the 3DGS-CV composite were very stable at high relative humidity. The 3DGS-CV composite revealed a thin, flexible profile, good moisture and thermal stability, and scalability for fabrication. These qualities allowed it to be successfully tested for temperature monitoring of a Li-ion battery during charging cycles and for large-area temperature mapping.

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Section: Resultsmentioning

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Materials Characterization Of 3dgs-cv Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Three-Dimensional Graphene Sheet-Carbon Veil Thermoelectric Composite with Microinterfaces for Energy Applications

Kondapalli,

Akinboye,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Biomimetic Multifunctional Graphene‐Based Coating for Thermal Management, Solar De‐Icing, and Fire Safety: Inspired from the Antireflection Nanostructure of Compound Eyes

Cui,

Zheng,

et al. 2024

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Due to the ubiquitous and inexhaustible solar source, photothermal materials have gained considerable attention for their potential in heating and de‐icing. Nevertheless, traditional photothermal materials, exemplified by graphene, frequently encounter challenges emanating from their elevated reflectance. Inspired by ocular structures, this study uses the Fresnel equation to enhance the photo‐thermal conversion efficiency of graphene by introducing a polydimethylsiloxane (PDMS)/silicon dioxide (SiO2) coating, which reduces the light reflectance (≈20%) through destructive interference. The designed coating achieves an equilibrium temperature of ≈77 °C at one sun and a quick de‐icing in ≈65 s, all with a thickness of 5 µm. Simulations demonstrate that applying this coating to high‐rise buildings results in energy savings of ≈31% in winter heating. Furthermore, the combination of PDMS/SiO2 and graphene confers a notable enhancement in thermal stability through a synergistic flame‐retardant mechanism, effectively safeguarding polyurethane against high temperatures and conflagrations, leading to marked reduction of 58% and 28% in heat release rate and total heat release. This innovative design enhances the photo‐thermal conversion, de‐icing function, and flame retardancy of graphene, thereby advancing its applications in outdoor equipment, high‐rise buildings, and aerospace vessels.

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Graphene-CNT Hybrid Structures for Energy Storage Applications

Khosravifar,

Kondapalli,

Fang

et al. 2024

Engineering Materials

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New architecture of 3D graphene with enhanced properties obtained by cold rolling

Cited by 7 publications

References 56 publications

Three-Dimensional Graphene Sheet-Carbon Veil Thermoelectric Composite with Microinterfaces for Energy Applications

Three-Dimensional Graphene Sheet-Carbon Veil Thermoelectric Composite with Microinterfaces for Energy Applications

Biomimetic Multifunctional Graphene‐Based Coating for Thermal Management, Solar De‐Icing, and Fire Safety: Inspired from the Antireflection Nanostructure of Compound Eyes

Graphene-CNT Hybrid Structures for Energy Storage Applications

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