Synthesis of various nano carbon filaments by CVD over catalysts loaded on a metal oxides composite

Tsujino, Gai; Ota, Hiraku; Nishitani‐Gamo, Mikka; Nakagawa, Kiyoharu; Oda, Hirokazu

doi:10.7209/tanso.2015.2

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…MNC was synthesized via chemical vapor deposition (CVD) method using a horizontal rotating fluidized bed reactor [31]. We took 200 mg of the oxidized-diamondsupported Pd catalyst and uniformly distributed it on a quartz boat.…”

Section: Methodsmentioning

confidence: 99%

Investigation of the electrochemical intercalation of Ca2+ into graphite layer carbon nano filaments as a novel electrode material for calcium-ion batteries

Nishimura

Yamazaki

Sakoda³

et al. 2023

SN Appl. Sci.

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We investigated the electrochemical intercalation of Ca2+ or solvated Ca2+ into Marimo nano carbon (MNC) as an anode material for calcium-ion batteries. When Ca (ClO4)2 and Ca (TFSI)2 were used as electrolyte salts, the solution structure changed in the γ-butyrolactone solvent. Additionally, higher charge capacitance was obtained at the MNC electrode than at the graphite electrode. When heat-treated MNCs were used with each electrolyte (ClO4)2 intercalated better than Ca (TFSI)2.

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Section: Methodsmentioning

confidence: 99%

Investigation of the electrochemical intercalation of Ca2+ into graphite layer carbon nano filaments as a novel electrode material for calcium-ion batteries

Nishimura

Yamazaki

Sakoda³

et al. 2023

SN Appl. Sci.

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“…CNFs were synthesized by the CVD method using a horizontal rotating fluidized bed reactor (10). Oxidized diamond-supported Pd catalyst was used 200 mg and uniformly distributed in a quartz boat.…”

Section: Preparation Of Catalyst For Synthesis Cnfsmentioning

confidence: 99%

Development of Negative Electrode for Calcium Ion Battery Using Marimo Nano Carbon

Nishimura

Nakagawa

2020

Meet. Abstr.

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Lithium-ion batteries (LIBs) are used in various fields due to their high energy density and high cycle characteristics. In general, graphite materials are used for the negative electrode materials for lithium-ion batteries (LIBs). However, since the amount of Li ion that can be stored in the graphite material of the negative electrode is approaching the theoretical value for LIBs, a significant increase in capacity cannot be expected. Calcium ion batteries (CIBs) use Ca ion as charge carriers. Therefore, they can be expected to have twice the capacity of LIBs. In LIBs, charge and discharge mechanism occurs by intercalation and deintercalation of Li ion into graphite layers. However, Ca ion are poor in reactivity, intercalation and deintercalation of Ca ion do not occur in the graphite negative electrode, and charge and discharge capacity cannot be obtained. For this reason, we used Marimo Nano Carbon (MNC) as a new negative electrode material. MNC is an aggregate of carbon nano filaments (CNF). CNF has a layered structure similar to graphite and also has amazing electronic properties and many other unique properties. This CNF has coin-stacked structure in which graphene layers are stacked, and the edge surface is exposed. Hence, we expected that MNC negative electrode would react with less reactive Ca ions and indicated larger charge / discharge capacity than that of the graphite negative electrode. In this study, we evaluated MNC negative electrode performance. For MNC synthesis, nano metal particles carried on oxidized diamond were used. Oxidized diamond has oxygen-containing functional groups arranged regularly. Thus, nano metal particles are a highly dispersed on it. Pd metal was used for carried metal. Pd metal could synthesized CNF having coin-stacked structures. Pd metal was carried on oxidized diamond by metal nano-colloidal method. C2H4 as a feedstock for CNF was used, and MNC was synthesized by the chemical vapor deposition (CVD) method. When MNC was used as the negative electrode material, the charge and discharge capacity was larger than that of the graphite negative electrode. In addition, the intercalation of Ca ions between the graphene layers was confirmed.

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“…CNFs were synthesized using oxidized diamond supported catalysts. The synthesized CNFs exhibit a cup-stack primary structure (11,12). The edge of the graphene sheets was exposed to the CNF surface area.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mesopores of Marimo Nano Carbon Anode Material on Power Generation Performance of Direct Glucose Fuel Cell

Akiyama

Nakagawa

2020

Meet. Abstr.

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Direct Glucose Fuel Cell (DGFC) is attracting attention as a clean and sustainable energy source because glucose is the most organic substance in nature. In this study, the effect of the mesopores of marimo nano carbon (MNC) on power generation performance for anode material of direct glucose fuel cell was investigated. Three types of MNC with different mesopore distributions were used for the catalyst support material, Pt was used as the supported metal. Also, Vulcan XC-72 which is carbon black of microporous material was used as a comparative material. In the glucose fuel cell performance test, MNC having many pores of about 35 nm showed the highest maximum output density of 0.72 mW cm-2 at 5 wt% metal loading and 0.3 M Glucose. Vulcan XC-72, which was a microporous material had low power generation performance. MNC showed higher power generation performance than that of Vulcan XC-72. The pores of about 35 nm probably promoted ion diffusion and rapid mass transport of reactants and products. These results indicated that MNC was an effective material as anode material for DGFC. Figure 1

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Synthesis of various nano carbon filaments by CVD over catalysts loaded on a metal oxides composite

Cited by 6 publications

References 27 publications

Investigation of the electrochemical intercalation of Ca2+ into graphite layer carbon nano filaments as a novel electrode material for calcium-ion batteries

Investigation of the electrochemical intercalation of Ca2+ into graphite layer carbon nano filaments as a novel electrode material for calcium-ion batteries

Development of Negative Electrode for Calcium Ion Battery Using Marimo Nano Carbon

Effect of Mesopores of Marimo Nano Carbon Anode Material on Power Generation Performance of Direct Glucose Fuel Cell

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