Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1636017 | Transactions of Nonferrous Metals Society of China | 2015 | 7 Pages |
Abstract
The ambient electrical conductivity (AEC) of carbon cathode materials was investigated in respect to their open porosity, crystal structure and graphite content using hydrostatic method, four-probe technique and X-ray diffraction (XRD), respectively. The AEC is proportional to the specific conductivity (Ï0) and the exponential of (1-É) (É is porosity) by a quasi-uniform formula based on the percolation theory. The Ï0 can reflect the intrinsic conductivity of the carbon cathodes free of pores, and it depends on the mean crystallite size parallel to the layer (002). The exponent n is dependent on the materials nature of the cathode aggregates, while an averaged value, 4.65, can practically work well with 5 types of cathode materials. The calculation of Ï0 can be extended to the graphitic cathodes containing different aggregates using the simple rule of mixture.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Jun ZHU, Ji-lai XUE, Ya-nan ZHANG, Xiang LI, Tong CHEN,