OREANDA-NEWS. December 10, 2012. In collaboration with the National Institute of Advanced Industrial Science and Technology (hereinafter “AIST”), we have successfully applied a wet-spinning method(note 1) to produce polymer-free, high-density carbon nano tube (hereinafter “CNT”) fibers with the world’s highest electrical conductivity.

In collaboration with AIST, we analyzed the conditions for preparation of CNT dispersion liquids and types of congealed liquid. We found that CNT fibers could be produced under certain conditions even with the use of organic solvent that does not contain polymers as congealed liquid. With the absence of polymer components, an insulating body, the CNT fibers have a high electrical conductivity nearly 20 times greater than that of the conventional wet-spinning method using polymers as congealed liquid.

 At the present, CNT fibers fall short of regular copper wires in terms of electric conductivity, but CNTs are stronger and lighter than metals. By maximizing their characteristics, we will continue to generate improvements in pursuit of development of next-generation electrical wires that match the conductivity of copper wires.