Microtubes made of carbon nanotubes

A technology of carbon nanotubes and microtubes, applied in the field of microtubes, can solve the problems of unavailability of tubular fuel cells and other problems

Active Publication Date: 2016-06-15
迪威安德亚琛工业E.V.
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the production of tubular fuel cells and redox flow battery stacks has been hampered by the unavailability of (apparently) self-supporting porous tubular carbonaceous electrodes.

Method used

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  • Microtubes made of carbon nanotubes
  • Microtubes made of carbon nanotubes
  • Microtubes made of carbon nanotubes

Examples

Experimental program
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Effect test

preparation example Construction

[0055] The preparation of suspensions of carbon nanotubes is well known to those skilled in the art, and numerous procedures are suitable for the manufacture of CNT suspensions suitable for the manufacture of microtubes made of carbon nanotubes. In general, the preparation of CNT suspensions involves several main steps briefly described here. Before preparing the suspension, the CNTs are pretreated to remove carbonaceous impurities and catalyst residues (Fe, Co, Ni, Au, Pd, Ag, Pb, Mn, Cr, Ru, Mo, Cu, ). Next, the modification of the carbon nanotubes described previously can be performed. This step is followed by the preparation of the suspension. A large number of solvents are known for the preparation of CNT suspensions. A few examples are: isopropylalcohol (IPA), N-methylpyrrolidone (NMP), N,N-dimethylformamide (N,N-dimethylformamide, DMF) and water. Prepare water using suitable surfactants such as Triton X-100, sodium dodecylbenzenesulfonate (NaDDBS), sodium dodecylsul...

example 1

[0067] Example 1: Free-standing microtubes made from multi-walled carbon nanotubes

[0068] Multi-walled carbon nanotubes (MWCNTs) (>95% purity, Sigma-Aldrich) with an outer diameter of 6-9 nm and a length of 5 μm were used as received without any pretreatment. An aqueous suspension of pristine CNTs was prepared as follows: 1 gram of CNTs was mixed with 10 g of Triton-X100 (laboratory grade, Sigma-Aldrich) surfactant in 1 liter of distilled water (18 m'Ω), magnetically stirred for 30 minutes and Sonication was continued for 3 hours in 1 liter Duran bottles (75% amplitude, UP200S, Hielscher), which were submerged in an ice bath to prevent overheating of the suspension. Internal → external filtration using MWCNT suspensions via polypropylene (polypropylene, PP) microfiltration (microfiltration, MF) hollow fiber membranes (with 46.5 cm length and 1.8 ± 0.15 and 0.45 ± 0.05 mm inner diameter and wall thickness, respectively, PPS6 / 2 , Accurel) to prepare from MWCNT ( Figure 5 ) ...

example 2

[0080] Example 2: Membrane Electrode Assembly with Proton Exchange Membrane and Microtubes Made of Carbon Nanotubes

[0081] Microtubes made of multi-walled carbon nanotubes with an outer diameter of 836 (±0.7%) μm and a wall thickness of 274.4 (±3.6%) μm were coated with Nafion117 solution (5%, Aldrich) by brushing and air-drying . Thermal curing was performed in a vacuum oven at 150° C. for 6 hours. Figure 11 A cross-sectional image of a membrane electrode assembly recorded using a scanning electron microscope is shown.

[0082] The resulting thickness of the film was approximately 15 μm. The MEA was tested for leakage with 5M sulfuric acid which was pumped through the tubular MEA using a peristaltic pump at a flow rate of 30ml / min. No visible loss of solution through the MEA was detected. This membrane electrode assembly can be assembled with secondary microtubular CNT electrodes using electrophoretic deposition methods. Alternatively, individually fabricated microtub...

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Abstract

The present invention relates to microtubes made of carbon nanotubes or composites based on carbon nanotubes. The present invention also relates to the use of such microtubes made of carbon nanotubes or composites based of carbon nanotubes as stand alone electrodes electrodes or integrated with current collectors or as a part of membrane electrode assemblies applied in electrochemical systems such as primary and secondary batteries, redox flow batteries, fuel cells, electrochemical capacitors, capacitive deionization systems, electrochemical- and biosensors devices, or solar cells. Another use of the microtubes made of carbon nanotubes or composites based on carbon nanotubes relates to their application as supported or unsupported tubular membranes for water or wastewater filtration, in aqueous and organic solvent filtration, for blood filtration, for gas separation processes, in gas and liquid adsorption processes or in sensor applications.

Description

technical field [0001] The present invention relates to microtubes made of carbon nanotubes or carbon nanotube-based composites. The present invention also relates to the use of such microtubes made of carbon nanotubes or carbon nanotube-based composites as stand-alone electrodes or integrated with current collectors or as part of membrane-electrode assemblies applied in electrochemical systems that Systems such as primary and secondary batteries, redox flow battery packs, fuel cells, electrochemical capacitors, capacitive deionization systems, electrochemical and biosensor devices or solar cells. Another use of microtubes made of carbon nanotubes or carbon nanotube-based composites involves their application for water or waste water filtration, for aqueous and organic solvent filtration, for blood filtration, for gas separation Process, supported or unsupported tubular membranes for gas and liquid adsorption processes or for sensor applications. Background technique [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22C25D13/02H01M4/36H01M4/587H01M4/62H01M4/88H01M4/90H01M4/92H01M8/16H01M8/18C25B9/19
CPCH01M4/362H01M4/587H01M8/16H01M8/188H01M4/625H01M4/8803H01M4/8875H01M4/926H01M2008/1095C25D13/02B82Y30/00B01D53/228B01D2257/504C02F2305/08Y02W10/37A61M2205/3334A61M1/3403H01M4/9083A61M1/34Y02E60/13Y02C20/40Y02E60/50Y02P20/151Y02E60/10C25B9/19C25B11/043C01B32/168C01P2004/61C01B2202/06B01D71/0212B01D69/04B01J21/18C02F1/44G01N27/403H01G11/26H01G11/36H01G11/68H01G11/86H01M8/1004H01M8/1213H01M8/20H01M10/0525H01M2008/1293
Inventor 伍里·根迪尔马缇亚斯·维斯灵安纳·大卫
Owner 迪威安德亚琛工业E.V.
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