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Metal microfiber-nano carbon composite material and preparation method

A composite material and metal microfiber technology, applied in the field of materials, can solve the problems of unfavorable electric double layers, high impedance, limited carbon nanotube carrying capacity, etc., and achieve the effects of broad application prospects, low manufacturing costs, and easy manufacturing.

Inactive Publication Date: 2012-05-09
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon fiber (diameter 10-13 mm) cloth has attracted people's attention because it can be made into paper, cloth, and felt according to needs and is easy to fold and shape; but its rich micropores easily lead to "overlapping effect" in space. "It is not conducive to the formation of the electric double layer
[0004] It has been reported in the literature (Appl.Phys.Lett.89(2006) 053127 / 1-053127 / 3) that nanotube carbon is grown by chemical vapor deposition on nickel foil and used for capacitive desalination. The adsorption capacity per unit weight and carbon aerogel The same, the adsorption capacity per unit volume is 100 times and hundreds of times of the latter; but the one-dimensional planar structure of the material is not conducive to radial mass transfer, etc.
Bordjiba et al. (Chem.Phys.Lett.441 (2007) 88-93) reported a carbon paper material modified by multi-walled carbon nanotubes, but the loading capacity of carbon nanotubes (CNTs) is limited, and carbon nanotubes (CNTs) ) and carbon paper did not achieve "fusion" contact, resulting in high impedance

Method used

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  • Metal microfiber-nano carbon composite material and preparation method
  • Metal microfiber-nano carbon composite material and preparation method
  • Metal microfiber-nano carbon composite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] The first is the preparation of monolithic sintered metal microfiber matrix

[0028] Using papermaking / post-sintering technology to prepare a sintered metal microfiber structure matrix with a large porosity and a three-dimensional network structure, the specific preparation process refers to the literature (Appl.Catal.A2007, 328:77; AIChEJ2007, 53:1845); metal fiber They are: 8 micron diameter Ni fiber, 12 micron stainless steel (alloy, SS-316L) fiber, 8 micron diameter Cu fiber, 8 micron diameter Co fiber, 8 micron diameter Fe fiber and 8 micron diameter Al fiber ; The sintering process for preparing the overall large-area microfiber structure is carried out in a hydrogen atmosphere, and the sintering temperatures are: 950°C, 1100°C, 900°C, 950°C, 1000°C and 650°C.

[0029] The obtained monolithic sintered metal microfiber matrix is ​​respectively expressed as: SF Ni , SF SS , SF Cu , SF Co , SF Fe and SF Al The thickness of the sintered metal microfiber matrix i...

Embodiment 1-3

[0032] Cut the sintered Ni metal microfiber matrix SF with a diameter of 8.5 cm Ni , as for the quartz tube reactor with an inner diameter of 8.5 cm, purging with high-purity nitrogen at room temperature to fully replace the air; 300ml / min; at 700°C, ethylene in SF Ni Decompose under the catalytic action of Ni metal microfiber substrate and deposit carbon on the surface of the Ni metal microfiber matrix; control the time of feeding ethylene / hydrogen mixed gas to 2 minutes, 30 minutes and 60 minutes respectively, and then switch to high-purity nitrogen to fully purge and in nitrogen atmosphere The nano-carbon-Ni metal microfiber composites were prepared by cooling down to room temperature, which were denoted as NC-SF Ni -1, NC-SF Ni -2 and NC-SF Ni -3, the amount of carbon deposition was 1% by weight, 52% by weight and 62% by weight, respectively.

[0033] NC-SF Ni The optical, scanning electron microscope (SEM) and transmission electron microscope (TEM) diagrams of -2 ref...

Embodiment 4-8

[0035] Except for the following differences, other conditions are the same as in Example 2.

[0036] Replace ethylene with carbon monoxide, methane, ethane, propane and butane respectively; when using methane as the carbon source, control the reaction temperature at 750°C; when using propane and butane as the carbon source, the gas flow rate is 50 ml / min .

[0037] The prepared nano-carbon-Ni metal microfiber composites are denoted as NC-SF Ni -4, NC-SF Ni -5, NC-SF Ni -6, NC-SF Ni -7 and NC-SF Ni -8, the carbon deposition amounts thereof were 35% by weight, 44% by weight, 49% by weight, 52% by weight and 56% by weight.

[0038] NC-SF Ni The transmission electron microscope (TEM) picture of -5 is referred to Image 6 ,Depend on Image 6 It can be seen that there are both carbon nanotubes and amorphous carbon.

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Abstract

The invention discloses a metal microfiber-nano-carbon composite material. The material takes integral sintered metal microfiber as a matrix and is obtained by carbon deposition on the surface of the matrix; wherein, the obtained material contains 1 percent to 65 percent of carbon and 35 percent to 99 percent of the metal microfiber according to weight ratio. The material needs no agglomerant, has 3-d open pore structure, excellent electric conductivity and thermal conductivity, wide application prospect in the electrochemistry, catalytic field and other fields and can be prepared on a large area, with low cost.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a large-surface-area monolithic sintered metal microfiber-nano-carbon composite material with an open pore structure and a preparation method thereof. Background technique [0002] As a new generation of carbon-based materials, nanocarbons have great application prospects in heterogeneous catalysis, electrocatalysis, and electrode materials due to the variability and controllability of their microstructure and surface physicochemical properties. New energy conversion and storage technologies such as fuel cells, secondary batteries, and supercapacitors are looking forward to high-performance carbon electrodes / electrocatalytic materials, which has aroused people's research on nanocarbons (especially carbon nanotubes). Since the 1990s, people have carried out extensive and in-depth research on the structure-controllable synthesis of carbon nanotubes, the regulation of micro-region...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/26C23C16/455C23C16/52
Inventor 路勇姜芳婷方玉珠薛青松何鸣元
Owner EAST CHINA NORMAL UNIV
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