Biomimetic superelastic graphene-based cellular monoliths

Qiu, Ling; Liu, Jefferson Zhe; Chang, Shery L. Y.; Wu, Yanzhe; Li, Dan

doi:10.1038/ncomms2251

Cited by 1,155 publications

(1,147 citation statements)

References 47 publications

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Section: Discussionmentioning

confidence: 99%

Section: Interface Interactionsmentioning

confidence: 99%

“…For example, Qiu et al [22] successfully fabricated bioinspired graphene-based cellar monoliths by applying a freeze-casting technique mimicking natural cork. Figure 10C shows the scheme of fabricating ultralight and superelastic bioinspired graphene-based cellular monoliths.…”

Section: Strain Sensorsmentioning

confidence: 99%

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High‐Performance Nanocomposites Inspired by Nature

2017

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Over the eons of evolutionary time, natural materials, including nacre, bone, lobster cuticle, and many others, developed delicate multiscale structures demonstrating outstanding properties. These natural materials provide endless inspiration for the fabrication of novel bioinspired structural materials. Extensive research has revealed the mechanism responsible for natural materials' properties and shows that high-performance structural materials could be fabricated via bioinspired strategies. [1][2][3][4][5][6][7][8][9][10] With the quest to develop novel bioinspired materials, it is essential to refine some basic scientific principles that can guide bioinspired fabrication.Recent research has indicated that the amplification of natural materials' mechanical properties far beyond those of the components that comprise them originates mainly from: i) a hierarchical micro-/nanoscale architecture and ii) abundant effective interface interactions. Here, we follow the roadmap of "discovery, invention, and creation," as shown in Figure 1, to give insight into the development of bioinspired structural materials. In the "discovery" section, natural materials are described as a source of inspiration. Bioinspired nanocomposites can be invented to mimic or even to surpass natural materials' attributes, as described in the "invention" section. We illustrate how the basic principles could work for bioinspired nanocomposites with different building blocks and fabrication approaches. Finally, in the "creation" section, we review novel multifunctional nanocomposites with properties that natural materials rarely possess. To provide a vision and inspiration for future research, we conclude with our perspectives on new and promising directions in the field, along with problems remaining to be solved. Discovery: Natural Materials Orderly Hierarchical ArchitecturesNatural materials are made at ambient temperatures from a relatively small number of ingredients that exhibit rather meager properties. Almost all of them are composites with orderly hierarchical architectures that arrest crack propagation, thus preventing catastrophic failure. Insight into the architecture of a typical natural material is the key to understanding the superiority of the biomimetic strategy for making novel synthetic materials.Natural materials, including nacre, bone, and the lobster cuticle, exhibit excellent mechanical properties, combining high strength and toughness. Such materials have the added benefit of being light in weight. These advantageous features are due to such natural materials' orderly hierarchical architectures and abundant interface interactions. How to utilize these design principles created by nature to fabricate high-performance bioinspired nanocomposites remains a great research challenge. A logical roadmap for developing these nanocomposites can be described as "discovery, invention, and creation." Here, the discovery of the relationship between natural materials' design principles and such materials' extraordinary mechanical proper...

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Section: Discussionmentioning

confidence: 99%

Section: Interface Interactionsmentioning

confidence: 99%

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High‐Performance Nanocomposites Inspired by Nature

2017

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“…In this case, the ice only grows gradually from outside interface to inside, during which the layers tend to concentrate at the boundary of ice crystals and align vertically. [60,61] In order to obtain a homogeneous 3D assembly, the GO dispersion should be congruently frozen. Thus, the volume of the dispersion must be minimized.…”

Section: Methodsmentioning

confidence: 99%

Design of 3D Graphene‐Oxide Spheres and Their Derived Hierarchical Porous Structures for High Performance Supercapacitors

Gadipelli

Yang

et al. 2017

Small

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Graphene‐oxide (GO) based porous structures are highly desirable for supercapacitors, as the charge storage and transfer can be enhanced by advancement in the synthesis. An effective route is presented of, first, synthesis of three‐dimensional (3D) assembly of GO sheets in a spherical architecture (GOS) by flash‐freezing of GO dispersion, and then development of hierarchical porous graphene (HPG) networks by facile thermal‐shock reduction of GOS. This leads to a superior gravimetric specific capacitance of ≈306 F g−1 at 1.0 A g−1, with a capacitance retention of 93% after 10 000 cycles. The values represent a significant capacitance enhancement by 30–50% compared with the GO powder equivalent, and are among the highest reported for GO‐based structures from different chemical reduction routes. Furthermore, a solid‐state flexible supercapacitor is fabricated by constructing the HPG with polymer gel electrolyte, exhibiting an excellent areal specific capacitance of ≈220 mF cm−2 at 1.0 mA cm−2 with exceptional cyclic stability. The work reveals a facile but efficient synthesis approach of GO‐based materials to enhance the capacitive energy storage.

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“…Manufacturing processes can be distinguished between a template-based [9][10][11] and a templatefree [12] methods for the direct production of carbon aerogels. In addition, assembly of graphitic structures [13][14][15][16] can be carried out. One of these methods was the discovery of Aerographite [11].…”

Section: Introductionmentioning

confidence: 99%

Structural improvement of a bio-inspired 3D globular carbon foam by a continuously thermal treatment: A comprehensive study

Marx¹,

Beisch²,

Garlof³

et al. 2017

Adv Mater Sci

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The manufacturing of a 3D interconnected globular carbon foam, called Globugraphite, is based on the replication of the zinc oxide (ZnO) template morphology by carbon with simultaneous removing of the template material in the chemical vapour deposition (CVD -replica CVD (rCVD)) process. The growth mechanism of the presented carbon foam affected the formation of defects at the atomic level which leads in the following to graphitic pieces instead of layers. This substructure influences properties, such as electrical conductivity of the carbon foam negatively. By undergoing a temperature treatment at 1600°C, 1800°C, 2000°C and 2200°C in a protective gas atmosphere the carbon structure heals at the atomic level. The connection of the sp 2 /sp 3 graphitic pieces to graphitic sp 2 layers due to the thermal annealing is analysed via transmission electron microscopy (TEM) observation and Raman spectroscopy. Based on these analysis methods a model of the graphitization progress is created which explains the clearly increase of the electrical conductivity and the oxidation temperature.

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Biomimetic superelastic graphene-based cellular monoliths

Cited by 1,155 publications

References 47 publications

High‐Performance Nanocomposites Inspired by Nature

High‐Performance Nanocomposites Inspired by Nature

Design of 3D Graphene‐Oxide Spheres and Their Derived Hierarchical Porous Structures for High Performance Supercapacitors

Structural improvement of a bio-inspired 3D globular carbon foam by a continuously thermal treatment: A comprehensive study

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