Preliminary Study On The Application Of A Lithium-ion Battery Anode Prepared Double-walled Carbon Nanotubes

Carbon nanotubes have excellent mechanical properties and electrical properties, as a newone-dimensional nanomaterials,It caused the close attention of scientists around the world since itwas found. So far, chemical vapor deposition is the primary means to get large-scale carbonnanutubes..In this study, we produce high purity double-walled carbon nanotubes by the method offloating catalyst chemical vapor deposition.Changing the flow-rateing of the gas,we can find afeasible rate,under which the producing of double-walled carbon nanutubes can last for thelongest time. Based on the continuous producting of double-walled carbon nanutubes,we madedouble-walled carbon nanotubes film successfully.With the transmission electron microscopy, high-resolution transmission electronmicroscopy and Raman spectroscopy detection, we can find that double-walled carbon nanotubeshave laboratory prepared about5nm in diameter.Impurity element scattered bundles ofdouble-walled carbon nanutubes. The real component si iron wrapped by carbon crystal.Theproduct have5.8degree of graphitization. We had purified and distributed the double-walledcarbon nanotubes,then we do a test with Raman and infrared spectra about the double-walledcarbon nanutubes befor and after the purity and distribution.We find that graphitization declinedslightly,.The same infrared spectra showed that the method didn’t introduce new functionalgroups.The double-walled carbon nanotubes film was prepared directly into lithium ion batteriescathode.While purified and distributed double-walled carbon nanotubes was prepared as aconductive additive. The film showed that a first discharge of270mAh/g,and the first effective is67%; When used as an additive cathode showed initial discharge capacity of555mAh/g,which,compared to ordinary cathode conductive agent, increased by4.7%, while they have theconsistent initial charge-discharge efficiency.