Highly thermally conductive and mechanically strong graphene fibers

Xin, Guoqing; Yao, Tiankai; Sun, Hongtao; Scott, Spencer; Shao, Dali; Wang, Gongkai; Lian, Jie

doi:10.1126/science.aaa6502

Cited by 607 publications

(501 citation statements)

References 40 publications

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“…Note that the anisotropic liquid crystalline behavior of the graphene oxide sheets in aqueous solution leads to well aligned fi laments along the extruding direction due to the shear fl ow conditions. [ 30 ] The electrodes are printed layer-by-layer using these extruded fi laments into an arranged interdigitated pattern (Figure 1 b). Both electrodes were then freeze-dried to remove the water solvent and solidify the 3D structures.…”

Section: Doi: 101002/adma201505391mentioning

confidence: 99%

Graphene Oxide‐Based Electrode Inks for 3D‐Printed Lithium‐Ion Batteries

et al. 2016

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All-component 3D-printed lithium-ion batteries are fabricated by printing graphene-oxide-based composite inks and solid-state gel polymer electrolyte. An entirely 3D-printed full cell features a high electrode mass loading of 18 mg cm(-2) , which is normalized to the overall area of the battery. This all-component printing can be extended to the fabrication of multidimensional/multiscale complex-structures of more energy-storage devices.

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Section: Doi: 101002/adma201505391mentioning

confidence: 99%

Graphene Oxide‐Based Electrode Inks for 3D‐Printed Lithium‐Ion Batteries

et al. 2016

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“…Graphene, single layer of carbon atoms arranged in a two-dimensional honeycomb lattice [1,2], has attracted enormous research interest due to superior electronic electrical conductivity [2][3][4][5], mechanical strength [6][7][8], thermal conductivity [8] and unique optical properties [9,10]. Moreover, the electronic and optical properties of graphene can be manipulated at the nanoscale in a desired way by controlling lateral size, shape, type of edge, doping level and the number of layers in graphene nanostructures [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Effects of long-range disorder and electronic interactions on the optical properties of graphene quantum dots

2017

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We theoretically investigate the effects of long-range disorder and electron-electron interactions on the optical properties of hexagonal armchair graphene quantum dots consisting of up to 10806 atoms. The numerical calculations are performed using a combination of tight-binding, mean-field Hubbard and configuration interaction methods. Imperfections in the graphene quantum dots are modelled as a long-range random potential landscape, giving rise to electron-hole puddles. We show that, when the electron-hole puddles are present, tight-binding method gives a poor description of the low-energy absorption spectra compared to meanfield and configuration interaction calculation results. As the size of the graphene quantum dot is increased, the universal optical conductivity limit can be observed in the absorption spectrum. When disorder is present, calculated absorption spectrum approaches the experimental results for isolated monolayer of graphene sheet.

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“…3e) [184]. So far, to improve the properties of graphene fibers, much attention is paid to the structures, compositions and fabrication process [75,185,186]. Besides, hybrid fibers containing CNTs and rGO have been prepared through wet or dry methods in order to integrate the unique properties of the two carbon nanomaterials [187].…”

Section: Fabrication Of Graphene Fibersmentioning

confidence: 99%

Advanced carbon materials for flexible and wearable sensors

et al. 2017

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Flexible and wearable sensors have drawn extensive concern due to their wide potential applications in wearable electronics and intelligent robots. Flexible sensors with high sensitivity, good flexibility, and excellent stability are highly desirable for monitoring human biomedical signals, movements and the environment. The active materials and the device structures are the keys to achieve high performance. Carbon nanomaterials, including carbon nanotubes (CNTs), graphene, carbon black and carbon nanofibers, are one of the most commonly used active materials for the fabrication of high-performance flexible sensors due to their superior properties. Especially, CNTs and graphene can be assembled into various multi-scaled macroscopic structures, including one dimensional fibers, two dimensional films and three dimensional architectures, endowing the facile design of flexible sensors for wide practical applications. In addition, the hybrid structured carbon materials derived from natural bio-materials also showed a bright prospect for applications in flexible sensors. This review provides a comprehensive presentation of flexible and wearable sensors based on the above various carbon materials. Following a brief introduction of flexible sensors and carbon materials, the fundamentals of typical flexible sensors, such as strain sensors, pressure sensors, temperature sensors and humidity sensors, are presented. Then, the latest progress of flexible sensors based on carbon materials, including the fabrication processes, performance and applications, are summarized. Finally, the remaining major challenges of carbon-based flexible electronics are discussed and the future research directions are proposed. [56,57], have been used as the active components for the fabrication of flexible sensors. Among these materials, metal NPs can be used to fabricate flexible sensors with high sensitivity, but the sensing range and stretchability of these sensors are limited [58]. Besides, due to the limited chemical stability and reproducibility of metal nanowires, it is challenging to fabricate stable sensors using metal nanowires [10]. Similarly, conductive polymers with poor stability and conductivity are also difficult to be used for the fabrication of high-performance sensors [59]. In contrast, carbon materials are one of the most commonly investigated materials, especially CNTs and graphene (including graphene oxide (GO) and reduced graphene oxide (rGO)), due to their remarkable mechanical, electrical and thermal properties. To implement macroscopic applications, CNTs and graphene with superior properties in microscopic level should be converted into macroscopic functional assemblies, such as one dimensional (1D) fibers or yarns [60,61], two dimensional (2D) films or sheets [62,63], three dimensional (3D) architectures [64][65][66] (Fig. 1). The multi-scaled macroscopic carbon nanomaterials endow the flexible sensors with high sensitivity, excellent flexibility and good stability as well as desired configurations. Also, lo...

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Highly thermally conductive and mechanically strong graphene fibers

Cited by 607 publications

References 40 publications

Graphene Oxide‐Based Electrode Inks for 3D‐Printed Lithium‐Ion Batteries

Graphene Oxide‐Based Electrode Inks for 3D‐Printed Lithium‐Ion Batteries

Effects of long-range disorder and electronic interactions on the optical properties of graphene quantum dots

Advanced carbon materials for flexible and wearable sensors

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