Hydrogen storage in coiled carbon nanotubes

Gayathri, V.; Devi, Nitika; Ramkumar, Geetha

doi:10.1016/j.ijhydene.2009.11.083

Cited by 43 publications

(15 citation statements)

References 28 publications

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“…Coiled carbon nanotube (CNT) fibers, as an ideal spring device of artificial nanomaterials, possess great potential for a wide variety of applications. Their unique electrical, structural, thermal, and mechanical properties can be utilized to make reinforcements in composites, energy storage devices, and nano‐electromechanical systems (NEMS), such as resonators, actuators, or magnetic‐field detectors (conductive CNT springs employed as induction solenoids) 1–7. Extensive work has been carried out on the growth mechanism for better controlling coil morphology and yield since the discovery of helical CNT 8, 9.…”

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confidence: 99%

Nanohinge‐Induced Plasticity of Helical Carbon Nanotubes

Nagao

et al. 2013

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Helical carbon nanotubes with intentionally incorporated non-hexagonal defects have unexpectedly high toughness and plasticity, in addition to the well-recognized extreme elasticity. The obtained toughness approaches 5000 J g(-1) with decreasing spring radius. The high toughness originates from the plastic nanohinge formation as a result of distributed partial fractures. A strong spring size effect, contradictory to the continuum solution, is precisely described by an atomistic bond-breaking model.

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confidence: 99%

Nanohinge‐Induced Plasticity of Helical Carbon Nanotubes

Nagao

et al. 2013

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“…Using molecular dynamics simulations, they have shown that the theoretical maximum storage capacity of 7.7 wt% that can be achieved at 2.2 GPa pressure and at room temperature. 116 Many studies have been carried out to improve the hydrogen storage capacity of CNTs with additives. Followings are the effects of additives in CNTs.…”

Section: Methods To Improve Hydrogen Storage Capacity Of Cntsmentioning

confidence: 99%

“…This result may prove to be an interesting one that needs more attention on the aspect of physisorption in chiral single-walled CNT and also other nanostructures. Gayathri et al 116 have also studied the novel form of CNTs namely coiled CNTs ( Figure 10) as it proves to be a potential material for hydrogen storage. The CCNTs have built-in structural defects that will influence the hydrogen adsorption and they have predicted that CCNTs shows a good adsorption binding energies that may further be improved when number of pitches are increased which could lead to larger sites for hydrogen molecules to get adsorbed.…”

Section: Hydrogen Storage Capacity Of Cntmentioning

confidence: 99%

Hydrogen storage in carbon materials—A review

et al. 2019

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It is well known that three challenges of hydrogen economy, that is, production, storage, and transportation or application put tremendous stress on scientific community for the past several decades. Based on several investigations, reported in literature, it is observed that the storage of hydrogen in solid form is more suitable option to overcome the challenges like its storage and transportation. In this form, hydrogen can be stored by absorption (metal hydrides and complex hydrides) and adsorption (carbon materials). Compared to absorption, adsorption of hydrogen on carbon materials is observed to be more favorable in terms of storage capacity. Taking in to account of these facts, in this short review, an overview on hydrogen adsorption on activated carbon and different allotropes of carbon like graphite, carbon nanotubes, and carbon nanofibers is presented. Synthesis processes of all the carbon materials are discussed in brief along with their hydrogen storage capacities at different operating conditions, and thermodynamic properties and reaction kinetics. In addition, different methods to improve hydrogen storage capacities of carbon materials are presented in detail. Finally, comparison is made between different carbon materials to estimate the amount of hydrogen that can be stored and retract practically. The experimentally measured maximum hydrogen storage capacity of activate carbon, graphite, single‐walled nanotubes, multiwalled nanotubes, and carbon nanofibers at room temperature are 5.5 wt%, 4.48 wt%, 4.5 wt%, 6.3 wt%, and 6.5 wt%, respectively.

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“…[17]. Reproduced with permission of American Physical Society interesting to note that curvature and topology of HN-Tubes lead to an enhancement of molecular hydrogen absorption on their external surfaces [53]. The enhanced storage originates from very high surface area and a large number of topological defects, implying the utility of HN-Tubes as energy storage nanomaterials.…”

Section: Microscopic Modelmentioning

confidence: 99%