| 摘要 |
Provided are electrochemical (e.g., double layer capacitor) cell designs and methods of their manufacture, which reduce cell impedance and increase volumetric capacitance while maintaining inter-electrode dielectric integrity and cell performance. The designs eliminate the contiguous separator material used as the dielectric between the electrodes in conventional double layer capacitor cells. The separator is replaced by a noncontiguous array of dielectric particles, such as glass beads or fibers, sized and distributed to provide substantially uniform separation between the electrodes. The remaining space between the electrodes unoccupied by the dielectric particles is filled with electrolyte. In this way, a much greater proportion of the dielectric space between the electrodes is available for ionic transport. Glass beads and fibers are available with diameters less than that available for currently-used separator materials. Thus, the distance between the electrodes may be reduced without compromising dielectric integrity. The result is a lower impedance, higher volumetric capacitance double layer capacitor cell.
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