Wax-assisted crack-free transfer of monolayer CVD graphene: Extending from standalone to supported copper substrates

Qi, Pengwei; Huang, Yinan; Yao, Yuanzhou; Q, Li; Lian, Yuebin; Li, Gang; Wang, Xuebin; Gu, Yindong; Li, Liqiang; Deng, Zhao; Peng, Yang; Liu, Zhongfan

doi:10.1016/j.apsusc.2019.07.007

Cited by 17 publications

(13 citation statements)

References 44 publications

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“…Figure 2a shows the flowchart for coating both sides of the Li foil with the chemical vapor deposition (CVD)‐grown graphene film via a wax‐assisted protocol, which was previously developed in our group as a facile alternate for the classic PMMA method for graphene transfer. [ 17 ] The notable advantages of our wax method lie in the facilitated sample handling and template removal owing to the great thermal property and solubility of paraffin. More importantly, the transferred high‐quality graphene film with excellent integrity can maintain seamless and conformal contact with the underlying Li to avoid perforation and delamination.…”

Section: Resultsmentioning

confidence: 99%

Wax‐Transferred Hydrophobic CVD Graphene Enables Water‐Resistant and Dendrite‐Free Lithium Anode toward Long Cycle Li–Air Battery

et al. 2021

Advanced Science

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One of the key challenges in achieving practical lithium–air battery is the poor moisture tolerance of the lithium metal anode. Herein, guided by theoretical modeling, an effective tactic for realizing water‐resistant Li anode by implementing a wax‐assisted transfer protocol is reported to passivate the Li surface with an inert high‐quality chemical vapor deposition (CVD) graphene layer. This electrically conductive and mechanically robust graphene coating enables serving as an artificial solid/electrolyte interphase (SEI), guiding homogeneous Li plating/stripping, suppressing dendrite and “dead” Li formation, as well as passivating the Li surface from moisture erosion and side reactions. Consequently, lithium–air batteries fabricated with the passivated Li anodes demonstrate a superb cycling performance up to 2300 h (230 cycles at 1000 mAh g−1, 200 mA g−1). More strikingly, the anode recycled thereafter can be recoupled with a fresh cathode to continuously run for 400 extended hours. Comprehensive time‐lapse and ex situ microscopic and spectroscopic investigations are further carried out for elucidating the fundamentals behind the extraordinary air and electrochemical stability.

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Section: Resultsmentioning

confidence: 99%

Wax‐Transferred Hydrophobic CVD Graphene Enables Water‐Resistant and Dendrite‐Free Lithium Anode toward Long Cycle Li–Air Battery

et al. 2021

Advanced Science

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“…Therefore, wax-assisted transfer is preferable as it does not bond well with the graphene and favors clean and crack-free transfer (Figs. 3(e)-3(g)) [45]. Impurities from the growth substrate and their etchants are also responsible for unintentional doping.…”

Section: Wet Transfermentioning

confidence: 99%

“…However, all methods are accompanied by their own challenges, and a universal standard transfer procedure has not yet been developed. Each cleaning and transfer method is associated with challenges which ultimately cause contaminations [45], wrinkles [17], and cracks [21], as shown in Figs. 16(a)-16(c).…”

Section: Summary and Future Perspectivesmentioning

confidence: 99%

Graphene transfer methods: A review

et al. 2021

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Graphene is a material with unique properties that can be exploited in electronics, catalysis, energy, and bio-related fields. Although, for maximal utilization of this material, high-quality graphene is required at both the growth process and after transfer of the graphene film to the application-compatible substrate. Chemical vapor deposition (CVD) is an important method for growing high-quality graphene on non-technological substrates (as, metal substrates, e.g., copper foil). Thus, there are also considerable efforts toward the efficient and non-damaging transfer of quality of graphene on to technologically relevant materials and systems. In this review article, a range of graphene current transfer techniques are reviewed from the standpoint of their impact on contamination control and structural integrity preservation of the as-produced graphene. In addition, their scalability, cost- and time-effectiveness are discussed. We summarize with a perspective on the transfer challenges, alternative options and future developments toward graphene technology.

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“…Avoidance of wrinkling of the 2D sheets during relamination has driven much of the advancement in transfer strategies seeking to decrease the graphene-substrate distance during relamination. In particular, many strategies focus on the use of very soft polymer supports which can be easily melted and are thus conformable simultaneously to flat graphene and to the target substrate [117][118][119]. Of these materials, paraffin in particular has the interesting feature of a comparatively low boiling point, allowing the removal of the support material by heating under low pressure (Figure 11a) [120].…”

Section: Strategies Decreasing the Graphene-substrate Distancementioning

confidence: 99%

Graphene Transfer: A Physical Perspective

Langston

Whitener

2021

Nanomaterials

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Graphene, synthesized either epitaxially on silicon carbide or via chemical vapor deposition (CVD) on a transition metal, is gathering an increasing amount of interest from industrial and commercial ventures due to its remarkable electronic, mechanical, and thermal properties, as well as the ease with which it can be incorporated into devices. To exploit these superlative properties, it is generally necessary to transfer graphene from its conductive growth substrate to a more appropriate target substrate. In this review, we analyze the literature describing graphene transfer methods developed over the last decade. We present a simple physical model of the adhesion of graphene to its substrate, and we use this model to organize the various graphene transfer techniques by how they tackle the problem of modulating the adhesion energy between graphene and its substrate. We consider the challenges inherent in both delamination of graphene from its original substrate as well as relamination of graphene onto its target substrate, and we show how our simple model can rationalize various transfer strategies to mitigate these challenges and overcome the introduction of impurities and defects into the graphene. Our analysis of graphene transfer strategies concludes with a suggestion of possible future directions for the field.

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Wax-assisted crack-free transfer of monolayer CVD graphene: Extending from standalone to supported copper substrates

Cited by 17 publications

References 44 publications

Wax‐Transferred Hydrophobic CVD Graphene Enables Water‐Resistant and Dendrite‐Free Lithium Anode toward Long Cycle Li–Air Battery

Wax‐Transferred Hydrophobic CVD Graphene Enables Water‐Resistant and Dendrite‐Free Lithium Anode toward Long Cycle Li–Air Battery

Graphene transfer methods: A review

Graphene Transfer: A Physical Perspective

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