Carbon Nanotubes and Spheres Produced by Modified Ferrocene Pyrolysis

Hou, Haoging; Schaper, Andreas; Weller, F.; Greiner, Andreas

doi:10.1021/cm021206x

Cited by 155 publications

(100 citation statements)

References 39 publications

(69 reference statements)

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“…The geometries, types (e.g., single-walled (SWCNT) or multi-walled (MWCNT)) and relative amounts of nanotubes vs. other types of carbon formed are complex functions of the iron/carbon ratio in the feedstock and other synthesis conditions [23,24].…”

Section: Resultsmentioning

confidence: 99%

Impact of carbon structure and morphology on the electrochemical performance of LiFePO4/C composites

Doeff

Wilcox

et al. 2007

J Solid State Electrochem

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The electrochemical performance of LiFePO 4 /C composites in lithium cells is closely correlated to pressed pellet conductivities measured by AC impedance methods. These composite conductivities are a strong function not only of the amount of carbon, but of its structure and distribution. Ideally, the amount of carbon in composites should be minimal (less than about 2 wt. %) so as not to decrease the energy density unduly. This is particularly important for plug-in hybrid electric vehicle applications (PHEVs) where both high power and moderate energy density are required. Optimization of the carbon structure, particularly the sp 2 /sp 3 and D/G (disordered/graphene) ratios, improves the electronic conductivity while minimizing the carbon amount.Manipulation of the carbon structure can be achieved via the use of synthetic additives including iron-containing graphitization catalysts. Additionally, combustion synthesis techniques allow co-synthesis of LiFePO 4 and carbon fibers or nanotubes, which can act as "nanowires" for the conduction of current during cell operation.

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Section: Resultsmentioning

confidence: 99%

Impact of carbon structure and morphology on the electrochemical performance of LiFePO4/C composites

Doeff

Wilcox

et al. 2007

J Solid State Electrochem

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“…Serp et al [35], for example, produced carbon nanospheres (CNS) by decomposition of methane at 1100 °C, Wang et al [36] by the decomposition of benzene at 1000 °C. With the support of catalysts, pentane has been decomposed at 900-1000 °C [37], anthracene at 900-1000 °C [38] and camphor at 1000 °C [39], in all these cases resulting in the synthesis of carbon nanospheres.…”

Section: Discussionmentioning

confidence: 99%

Diamond-Like Carbon Nanofoam from Low-Temperature Hydrothermal Carbonization of a Sucrose/Naphthalene Precursor Solution

Frese

Mitchell

Bowers

et al. 2017

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Unusual structure of low-density carbon nanofoam, different from the commonly observed micropearl morphology, was obtained by hydrothermal carbonization (HTC) of a sucrose solution where a specific small amount of naphthalene had been added. Helium-ion microscopy (HIM) was used to obtain images of the foam yielding micron-sized, but non-spherical particles as structural units with a smooth foam surface. Raman spectroscopy shows a predominant sp 2 peak, which results from the graphitic internal structure. A strong sp 3 peak is seen in X-ray photoelectron spectroscopy (XPS). Electrons in XPS are emitted from the near surface region which implies that the graphitic microparticles have a diamond-like foam surface layer. The occurrence of separated sp 2 and sp 3 regions is uncommon for carbon nanofoams and reveals an interesting bulk-surface structure of the compositional units.

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“…On the other hand, although many compartments contain catalyst particles for the type II tubes, some compartments are empty. The real reason of such a phenomenon is not very clear, but is possible associated with an escaping [6], [29] and [30] of some catalyst particles that initially filled inside the compartments.…”

Section: The Growth Of Bamboo-shape Cntsmentioning

confidence: 99%

Formation of bamboo-shape carbon nanotubes by controlled rapid decomposition of picric acid

Lu¹,

Zhu²,

Su³

et al. 2004

Carbon

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In the presence of catalysts, carbon nanotubes (CNTs) can efficiently grow in the environment generated by the rapid decomposition of normal explosives. Controlling the reaction parameters of a mixture of picric acid (PA) with cobalt acetate and paraffin can lead to a welldefined morphology of CNTs. The formation of bamboo-shape tubes is favorable at relatively high Co(AC) 2 /PA and paraffin/PA ratios. It is found that the bamboo-shape tubes are different in morphology and structure and can be categorized roughly into two types, according to the participation of the catalyst nanoparticles. The formation of the two types is discussed.

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Carbon Nanotubes and Spheres Produced by Modified Ferrocene Pyrolysis

Cited by 155 publications

References 39 publications

Impact of carbon structure and morphology on the electrochemical performance of LiFePO4/C composites

Impact of carbon structure and morphology on the electrochemical performance of LiFePO4/C composites

Diamond-Like Carbon Nanofoam from Low-Temperature Hydrothermal Carbonization of a Sucrose/Naphthalene Precursor Solution

Formation of bamboo-shape carbon nanotubes by controlled rapid decomposition of picric acid

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