CVD Growth of Porous Graphene Foam in Film Form

Huang, Ming; Wang, Chunhui; Quan, Le; Nguyen, Thi Hai‐Yen; Zhang, Hanyang; Jiang, Yi; Byun, Gangil; Ruoff, Rodney S.

doi:10.1016/j.matt.2020.06.012

Cited by 57 publications

(38 citation statements)

References 41 publications

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“…Figure 4f shows the high‐resolution C 1s spectrum with 4 deconvoluted peaks centered at 284.5, 285.3, 286.4, and 290.8 eV, which are assigned to sp 2 ‐hybridized C, sp 3 ‐hybridized C, CO bond and π–π* shake‐up satellite, respectively. [ 15,25 ] While the sp 2 ‐hybridized configuration is characteristic to FLG arising from the in‐plane CC bonds, the sp 3 ‐like component present in the porous graphene film can be ascribed to structural defects induced during CVD growth such as deleterious sp 3 ‐bonded C or dangling bonds. [ 26 ] The weaker C–O peak is attributed to the absorption of oxygen or moisture due to exposure to ambient atmosphere.…”

Section: Resultsmentioning

confidence: 99%

“…Other approaches to obtain porous metal thin films with micrometer‐scale thickness can be done by either selectively removing one metal component from an alloyed foil, [ 5c,14 ] or by electroplating porous metal thin film on a different metal substrate. [ 15 ] To the best of our knowledge, construction of highly porous metal thin films with large‐area lateral in‐plane continuity and an interconnected interior to be utilized for the fabrication of high‐quality porous graphene thin film still remains a challenge. Herein, we present a new approach to fabricate porous graphene thin films by directly using commercial Ni foils as template via an all‐CVD route.…”

Section: Introductionmentioning

confidence: 99%

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3D Porous Graphene Films with Large‐Area In‐Plane Exterior Skins

Tay

et al. 2022

Adv Materials Inter

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Construction of macroscopic 3D architectures of graphene is crucial to harness the advantageous properties of planar 2D graphene and to enable integration to many conventional and novel applications. Ideally, the 3D structure of graphene should be free of defects, covalently interconnected, and can be produced at large‐scale. Among various assembly techniques, fabrication using chemical vapor deposition (CVD) enables the production of high‐quality graphene where selection of template is the key that determines its consequent crystalline quality and structural morphology. Herein, a new method is presented to synthesize high‐quality porous graphene film by incorporating an in situ reduction–oxidation cycling treatment to generate micrometer‐sized pores on commercial Ni foil using an all‐CVD process route. Owing to the unique morphological features of the modified Ni template, the graphene film exhibits a holey surface with large‐area exterior skin coverage of >94% and many interconnected ligaments within its porous interior. This extraordinary configuration gives rise to superior in‐plane electrical conductivity despite its low density. In comparison to state‐of‐the‐art materials for electromagnetic interference shielding, this porous graphene film is among the best performing materials with a specific shielding effectiveness of >550 dB cm3 g−1 and absolute effectiveness of >220 000 dB cm2 g−1.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

3D Porous Graphene Films with Large‐Area In‐Plane Exterior Skins

Tay

et al. 2022

Adv Materials Inter

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“…[ 1–4 ] Various techniques have been developed for preparing graphene, including mechanical exfoliation by a scotch‐tape assisted method, [ 1,5 ] liquid/chemical/electrochemical exfoliation, [ 6,7 ] laser irradiation, [ 8 ] thermal decomposition of silicon carbide, [ 9 ] and chemical vapor deposition (CVD). [ 10,11 ] Among them, CVD is the most efficient method for synthesizing large‐sized and high‐quality graphene films in a controllable way by adjusting or optimizing the growth conditions and engineering the substrates. Ruoff group first reported CVD growth of centimeter‐scale monolayer graphene on commercial Cu foil, [ 10 ] after which numerous efforts have been devoted to devising appropriate substrates and optimizing growth conditions to synthesize high‐quality graphene films.…”

Section: Introductionmentioning

confidence: 99%

Substrate Engineering for CVD Growth of Single Crystal Graphene

et al. 2021

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Single crystal graphene (SCG) has attracted enormous attention for its unique potential for next‐generation high‐performance optoelectronics. In the absence of grain boundaries, the exceptional intrinsic properties of graphene are preserved by SCG. Currently, chemical vapor deposition (CVD) has been recognized as an effective method for the large‐scale synthesis of graphene films. However, polycrystalline films are usually obtained and the present grain boundaries compromise the carrier mobility, thermal conductivity, optical properties, and mechanical properties. The scalable and controllable synthesis of SCG is challenging. Recently, much attention has been attracted by the engineering of large‐size single‐crystal substrates for the epitaxial CVD growth of large‐area and high‐quality SCG films. In this article, a comprehensive and comparative review is provided on the selection and preparation of various single‐crystal substrates for CVD growth of SCG under different conditions. The growth mechanisms, current challenges, and future development and perspectives are discussed.

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“…Since its advent in 2011, from the trend analysis of scientific publications on CVD GrF (Figure 4, data from the web of science), it is evident that there is a tremendous interest in tapping into intrinsic properties of graphene arranged in a 3D hierarchical structure. The procedure of producing 3D GrF by CVD technique is shown in the schematic in Figure 5 [29][30][31]. A porous metal foam with a reticulated structure, typically nickel with the desired pore shape and size, is chosen as the graphene deposition template.…”

Section: Introductionmentioning

confidence: 99%

“…The procedure of producing 3D GrF by CVD technique is shown in the schematic in Figure 5 [ 29 , 30 , 31 ]. A porous metal foam with a reticulated structure, typically nickel with the desired pore shape and size, is chosen as the graphene deposition template.…”

Section: Introductionmentioning

confidence: 99%

A Facile and Scalable Approach in the Fabrication of Tailored 3D Graphene Foam via Freeze Drying

Thomas

Agarwal

2021

Materials

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One of the challenges in the processing of advanced composite materials with 2D reinforcement is their extensive agglomeration in the matrix. 3D architecture of 2D graphene sheets into a Graphene Foam (GrF) assembly has emerged as an effective way to overcome agglomeration. The highly reticulated network of branches and nodes of GrF offers a seamless pathway for photon and electron conduction in the matrix along with improved mechanical properties. 3D GrF nano-filler is often fabricated by chemical vapor deposition (CVD) technique, which demands high energy, slow deposition rate, and restricting production to small scale. This work highlights freeze-drying (FD) technique to produce 3D graphene nanoplatelets (GNP) foam with a similar hierarchical structure to the CVD GrF. The FD technique using water as the main chemical in 3D GNP foam production is an added advantage. The flexibility of the FD in producing GNP foams of various pore size and morphology is elucidated. The simplicity with which one can engineer thermodynamic conditions to tailor the pore shape and morphology is presented here by altering the GNP solid loading and mold geometry. The FD 3D GNP foam is mechanically superior to CVD GrF as it exhibited 1280 times higher elastic modulus. However, thermal diffusivity of the FD GNP foam is almost 0.5 times the thermal diffusivity of the CVD GrF due to the defects in GNP particles and pore architecture. The versatility in GNP foam scalability and compatibility to form foam of other 1D and 2D material systems (e.g., carbon nanotubes, boron nitride nanotubes, and boron nitride nanoplatelets) brings a unique dimensionality to FD as an advanced engineering foam development process.

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CVD Growth of Porous Graphene Foam in Film Form

Cited by 57 publications

References 41 publications

3D Porous Graphene Films with Large‐Area In‐Plane Exterior Skins

3D Porous Graphene Films with Large‐Area In‐Plane Exterior Skins

Substrate Engineering for CVD Growth of Single Crystal Graphene

A Facile and Scalable Approach in the Fabrication of Tailored 3D Graphene Foam via Freeze Drying

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