Carbon nanotubes electric conductivity

Polyethylene carbon nanotube Electrical conductivity and rheological properties 18... 

The effectiveness of carbon nanotubes as conductive filler to cathode of lithium ion batteries (Fig. 17) was demonstrated by adding small amounts of both carbon nanotubes and acetylene blacks to LiCoOa-based active materials [77]. The merits of using carbon nanotubes together with acetylene blacks as cathode fillers include not only the enhancement of the electrical and the thermal properties of the electrode, but also the enhancement of the density of the electrode and the shortening of the electrolyte absorption time. We envisage that the use of carbon nanotubes as multi-functional fillers will increase in both cathode and anode materials for lithium ion secondary batteries. 

Bilotti E, Zhang H, Deng H, Zhang R, Fu Q, Peijs T (2013) Controlling the dynamic percolation of carbon nanotube based conductive polymer composites by addition of secondary nanofillers the effect on electrical conductivity and tuneable sensing behaviour. Compos Sci Technol 74 85... 

The newest addition to the forms of elemental carbon is the nanotube. A carbon nanotube is a long cylinder of carbon atoms, connected together in much the same way as in a fullerene. Both the diameter and the length of carbon nano-tubes can vary. Properties of nanotubes, such as their ability to conduct electrical charge, change dramatically with the dimensions of the tube. Carbon nanotubes are under intensive study. For example, a carbon nanotube laid down on a silicon chip forms a molecular transistor. Such devices may eventually lead to further miniaturization of the chips that are at the heart of modem computers. 

Carbon nanotubes are also of considerable interest with regard to both reinforcement and possible increases in electrical conductivity [237-239]. There is considerable interest in characterizing the flexibility of these nanotube structures, in minimizing their tendencies to aggregate, and in maximizing their miscibilities with organic and inorganic polymers. 

The orbital bonding nature within carbon nanotubes creates unique electrical properties within a non-metallic molecule, which is a result of the delocalization of the -electron donated by each atom. Electrical conductivity can take place along the entire nanotube due to the freedom of -electron flow, making possible the design of circuits of extremely low nanometer diameter. 

Meincke O, Kaempfer D, Weickmann H, Friedrich C, Vathauer M, Warth H (2004). Mechanical properties and electrical conductivity of carbon-nanotube filled polyamide-6 and its blends with acrylonitrile/butadiene/styrene. Polymer 45 739-748. 

Brown E, Hao L, Gallop JC, Macfarlane JC (2005) Ballistic thermal and electrical conductance measurements on individual multi wall carbon nanotubes. Applied Physics Letters 87 2-3. 

Dalmas F, Dendievel R, Chazeau L, Cavaille JY, Gauthier C (2006) Carbon nanotube-filled polymer of electrical conductivity in composites. Numerical simulation three-dimensional entangled fibrous networks. Acta Materialia 54 2923-2931. 

---