Direct growth of hollow carbon nanorods on porous graphenic carbon film without catalysts

Tu, Chia Hao; Wu, Ching Han; Chen, Chen‐Hui; Li, Yi Chang; Wang, Shih-Ting; Chen, Yen Chih; Lü, Cheng; Cai, Yi Jyun; Lin, Jarrn-Horng; Liu, Chuan Pu

doi:10.1016/j.carbon.2014.11.059

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…After 5 min of electrolysis, short carbon nanorods appeared on the graphite substrate and extruded from the edges of graphite flakes (denoted as the yellow circles, as shown in Figure S4). Because it is easy to form carbon dangling bonds at the edge of graphite flakes, 35 the edges of the graphite flakes may act as the nucleation sites to assist the growth of CNTs. Furthermore, the edges of graphite flakes are favorable for the accumulation of electrons at relatively low current densities, which facilitate fast electron transport to reduce CO 3 2− at these nucleation sites.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Electrochemical Growth of High-Strength Carbon Nanocoils in Molten Carbonates

Xiang

et al. 2021

Nano Lett.

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The reported mechanical strength of carbon nanocoils (CNCs) obtained from traditional preparation of catalytic acetylene pyrolysis is far below its theoretical value. Herein, we report a molten salt electrolysis method that employs CO3 2– as feedstock to grow CNCs without using metal catalyst. We meticulously mediate the alkalinity of molten carbonate to tune the electrochemical reduction of CO3 2– on graphite electrode to selectively grow CNCs in Li2CO3–Na2CO3–K2CO3–0.001 wt %Li2O. Graphite substrate, current density, and alkalinity of molten salt dictate the growth of CNCs. In addition, the electrolytic CNCs shows a spring constant of 1.92–39.41 N/m and a shear modulus of 21–547 GPa, which are 10–200 times that of CNCs obtained from catalyst-assisted gas-to-solid conversions. Overall, this paper opens up an electrochemical way to prepare CNCs through liquid-to-solid conversion without using catalysts and acetylene, providing new perspectives on green synthesis of 1D carbon nanomaterials with high mechanical strength.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Electrochemical Growth of High-Strength Carbon Nanocoils in Molten Carbonates

Xiang

et al. 2021

Nano Lett.

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“…Electrons move unimpeded at higher speeds throughout the lattice in G than in ordinary metals [100]. The conductivity, specific surface area, thermal conductivity and intrinsic mobility of G are approximately 2000 S cm À1 , 3100 m 2 g À1 , 3000W m À1 K À1 and 200 000 cm 2 V À1 s À1 , respectively [32,102,[109][110][111].…”

Section: Graphenementioning

confidence: 99%

A review on the use of carbon nanostructured materials in electrochemical capacitors

Mombeshora

Nyamori

2015

Int. J. Energy Res.

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SUMMARYSustainable and renewable energy resources, as well as energy storage systems (ESSs), are amongst the current and critical global requirements. A comparative discussion on batteries, fuel cells and electrochemical capacitors (ECs) is presented. The mechanisms involved in various classes of ECs are also elaborated. Additionally, a historical background highlighting some of the major steps associated with EC development over the years is discussed in this review. In particular, carbon nanostructured materials have high potential in the development of ESSs, and hence this review presents an insight on the current ESSs with a strong bias towards these materials as ECs. The current status of carbon nanomaterials, such as carbon nanotubes, nanofibers, nano-onions, nanorods, fullerenes and graphene nanosheets, in ECs is reviewed. The associated effects of nanostructural parameters, such as pore sizes and specific electro-active areas, amongst others, in terms of energy storage capabilities are also discussed. Typical physicochemical characterisation techniques, which enrich understanding of their characteristics, are also reviewed. The discussion views set platforms for a variety of unique carbon nanomaterial designs with high prospective specific capacitance. Key porosity tailoring protocols, such as chemical activation, introduction of heteroatoms in carbon nanostructures and template synthesis methods, are also reviewed. The effects of other device components, such as electrolyte ion size and solvent system, electrode design and use of binders, to the overall capability of EC, are also discussed.

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“…[1][2][3][4]. They can be applied to fuel cell [5,6], polymeric composites [7,8], hydrogen storage and supercapacitors [9][10][11]. In particularly, carbon nanorod has attracted intensive attentions with its appropriately electrical, thermal and mechanical properties, which has a potential application in electronic devices, interconnects, reinforcement materials [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of the Carbon Nanorods by β-Cyclodextrins with the Diathermic Oil Emulsification Process

Liao¹,

Zhang²,

Qian³

2019

J Nanotechnol Res

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A low-cost and environment-friendly method using β-cyclodextrins (β-CD) and diathermic oil emulsification process is applied to synthesize the carbon nanorods with a high production. The morphological and structural properties of the carbon nanorods are characterized by SEM and Raman. The chemical elemental analysis is discussed by means of FTIR and XPS. The results confirm that the nanomaterials are amorphous carbon with a diameter of approximate 100 nm. The surface of the obtained carbon nanorods are full of -OH, -C-O, -C=O functional groups, which can greatly improve the hydrophilicity and chemical reactivity of the carbon nanorods.

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Direct growth of hollow carbon nanorods on porous graphenic carbon film without catalysts

Cited by 5 publications

References 25 publications

Electrochemical Growth of High-Strength Carbon Nanocoils in Molten Carbonates

Electrochemical Growth of High-Strength Carbon Nanocoils in Molten Carbonates

A review on the use of carbon nanostructured materials in electrochemical capacitors

Fabrication of the Carbon Nanorods by β-Cyclodextrins with the Diathermic Oil Emulsification Process

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