BET surface area, pore volume, and pore radius of the
different carbon powders were measured by NOVA 1000
(Quantachrome) surface area analyzer using nitrogen as the
adsorbate. The performance of the test cells was evaluated by
continuous discharge of the test cells at a rate of 150 mA,
corresponding to the current requirement for a portable tape
recorder. Cell discharge was performed with a Hewlett
Packard DC electronic load bank. The cell potential and
cathode potential was recorded at various time intervals