MEASUREMENT OF TRUE SURFACE AREA IN ELECTRODES

The objective of the program is to understand and develop an electrochemical method for determining surface areas in porous electrodes. The measurement of the double-layer capacitance was selected as the most promising method. Further theoretical consideration was given to the matter of geometric effects resulting from the electrolyte resistivity. Such effects can affect the interpretation of double-layer capacitance measurements. Experimental work was concentrated on the improvement of equipment capability and measurement technique. Planned experiments are described which will demonstrate the geometric effects and test the theoretical predictions. These studies will help establish a measurement technique and a supporting theoretical framework for surface-area measurements. (Author) See also AD-613 299.