Carbon nanotube or carbon nanofiber electrode and process for preparing the same
A technology of carbon nanofibers and carbon nanotubes, which is applied in the field of carbon nanotube electrodes or carbon nanofiber electrodes and their preparation technology, which can solve the problems of increased internal resistance and achieve the effects of low contact resistance, strong durability and low ESR
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[0073] In the process for preparing carbon nanotube electrodes or carbon nanofiber electrodes according to the present invention, it is important to uniformly mix carbon nanotubes or carbon nanofibers with sulfur nanoparticles or metal nanoparticles used as a binder, but mixing Their methods are not particularly limited. As the method of mixing, there are mentioned physical mixing, ultrasonic mixing, generally dispersing in a solvent followed by removal of the solvent, and the like.
[0074] In the description of the present invention, the term "metal" is not limited literally, and it means any material having conductivity. For example, it means that all but nonmetals (elements in group VIII of the periodic table, F, Cl, Br, and I in group VII, 0 in group VI, N in group V, H in group I) and half Any element other than metals (B in group IIIB, C, Si and Ge in group IV, Se, Te and Po in group V). In particular, the term "metal" in the present invention is not specifically limi...
example 1
[0088] This example shows the fabrication of carbon nanotube electrodes or carbon nanofiber electrodes using copper (Cu) nanoparticles as a binder by depositing copper compound nanoparticles on carbon nanotubes and then reducing these nanoparticles of.
[0089] Carbon nanotubes (CNTs) used as electrode materials were synthesized by catalytic evaporation with an average diameter of 1 nm and 210 m 2 Single-walled nanotubes (SWCNT) (KH Chemicals Co., Ltd.) with a surface area of / g.
[0090] The copper compound Cu(NO 3 ) 2 deposited on carbon nanotubes. The carbon nanotubes deposited with copper compound nanoparticles were dried at 110°C for one day, and then reduced in hydrogen at 400°C for two hours. These Cu nanoparticle-deposited carbon nanotubes thus prepared were formed into discs under a pressure of 10 atm.
[0091] The Cu nanoparticle-deposited carbon nanotube disk was placed on a 75-μm-thick nickel foil as a current collector, and then kept at 900° C. for ten minu...
example 2
[0093] The Cu nanoparticle-deposited carbon nanotube powder prepared as in Example 1 was dispersed on a nickel foil as a current collector, and then kept at 1100° C. while applying pressure in nitrogen, thereby producing an electrode. The applied pressure was 10 atm, and the pressurization time was 5 minutes.
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