<i>In Situ</i> Observation of Wetting Ionic Liquid on a Carbon Nanotube

Imadate, Konan; Hirahara, Kaori

doi:10.1021/acs.langmuir.5b04720

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…Clearly, in addition to being a good physical support to accommodate the active material, the SWCNT network acts as a conductive pathway that promotes access of the electrolyte to the redox sites of S (justifying its much higher utilization rate). This is also a logical consequence of the increased contact area between the electrolyte and S. Graphitic carbons, especially small diameter nanotubes, are known to have excellent wettability in ionic liquids. − Here, this behavior was confirmed by the low electrolyte-to-sulfur (E/S) ratio achieved (17 μL mg –1 ). When compared to the previous literature, this value corresponds to a three-fold reduction in the electrolyte amount while obtaining a similar electrochemical performance (Figure S1d).…”

Section: Resultsmentioning

confidence: 80%

Capacity Retention Analysis in Aluminum-Sulfur Batteries

Smajic

Wee

Simões

et al. 2020

ACS Appl. Energy Mater.

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The electrochemical performance of aluminum-sulfur batteries is beset by poor stability and sluggish charge-storage properties. To address these issues, carbon allotropes have been used as electrode fillers, but successful outcomes remain inexplicably elusive. Here, a composite of sulfur and small-diameter single-walled carbon nanotubes was studied as a cathode for AlCl3:[EMIM]-based aluminum batteries. The presence of carbon nanotubes, while enabling a high capacity (1024 mAh g–1) with slower decay and reducing the electrolyte-to-sulfur ratio, is insufficient to fully stabilize the cell’s performance. In fact, the main obstacle is in the interaction between sulfur and chloroaluminate ions. As we show, there is a gradual buildup of insoluble and poorly conductive discharge products that inhibit the diffusion of electroactive ions and, ultimately, cause capacity decay. Overall, this work sheds light on the carbon–sulfur–electrolyte interactions and their role on the underlying charge-storage mechanism of aluminum-sulfur batteries.

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Section: Resultsmentioning

confidence: 80%

Capacity Retention Analysis in Aluminum-Sulfur Batteries

Smajic

Wee

Simões

et al. 2020

ACS Appl. Energy Mater.

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“…The test fiber was fixed to the AFM cantilever tip, and the force during the penetration and retraction of fiber from a liquid surface was measured. The result can be correlated to the contact angle, and it is estimated by the Wilhelmy method. − The other way is the direct observation of a droplet on fibers. , Nuriel et al observed a polymer liquid wetting on a CNT and discussed the surface energy of solid material …”

Section: Introductionmentioning

confidence: 99%

Wettability on Inner and Outer Surface of Single Carbon Nanotubes

Yamada

Takahashi²,

Takata³

et al. 2016

Langmuir

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The surface wettability of a liquid on the inner and outer surface of single carbon nanotubes (CNTs) was experimentally investigated. Although these contact angles on both surfaces were previously studied separately, the available data are of limited help to elucidate the effect of curvature orientation (concave or convex) on wettability due to the difference in surface structure. Here, we report on the three-phase contact region and wettability on the outer surface of CNT during the dipping and withdrawing experiment of CNT into an ionic liquid. Furthermore, the wettability on the inner surface was measured using a liquid within the same CNT. Our results show that the contact angle on the outer surface of the CNT is larger than that on the flat surface and that on the inner surface is smaller than that on the flat one. These findings suggest that the surface curvature orientation has a noticeable effect on the contact angle at the nanoscale because both inner and outer surfaces expose the same graphite wall structure and the contact line tension will be negligible in this situation. The presented results are rationalized using the free energy balance of liquid on curved surfaces.

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Recent Advances in the Theory of Non-carbon Nanotubes

Enyashin

2018

Computational Materials Discovery

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Our classical understanding of hollow inorganic nanostructures, established by Linus Pauling in 1930 and recommenced by Reshef Tenne 25 years ago, has undergone a revolution in recent years, owing to the rapid growth of computational facilities and to the new experimental and theoretical techniques looking into the origin of properties at an atomistic level. This overview gathers both the basic concepts and the most recent results from the diverse and broad field of computational materials science devoted to non-carbon nanotubes. A special emphasis is given to the stability, electronic, mechanical and capillary properties obtained at an interface between fundamental theoretical research and engineering of new advanced materials like commercially available nanotubes of layered sulfides, aluminosilicates and boron nitride.

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In Situ Observation of Wetting Ionic Liquid on a Carbon Nanotube

Cited by 4 publications

References 17 publications

Capacity Retention Analysis in Aluminum-Sulfur Batteries

Capacity Retention Analysis in Aluminum-Sulfur Batteries

Wettability on Inner and Outer Surface of Single Carbon Nanotubes

Recent Advances in the Theory of Non-carbon Nanotubes

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