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THE ACCELERATED TEST PROGRAM A chlorine-chlorine test cell instead of a zinc-chlorine cell will be employed in the study • ® m • for the following reasons: A doubling of electrode data. Gas phase will be more stable, since H2/CI2 recombination will not be a factor. Ease of cell operation since zinc-plate dendrite problems are avoided. Electrolyte pH may be employed as a measure of electrode corrosion. By using this type of a cell, however, it will obviously not be possible to monitor directly capacity losses or discharge-voltage profile decay. The advantages would, however, appear to warrant this approach initially. Parameters to be Monitored Graphite Corrosion Products. Graphite corrosion products will be monitored routinely. Gas phase makeup will be followed with a "dedicated" gas chromatograph. Debris gener ated will be collected and weighed. A correlation between electrode weight change (which will be determined) and the CO^ and debris generated may exist. Inter-electrode gap will be large enough to allow inspection of the electrode face for flatness during operation. Structural integrity, although not directly measured via cell capacity, will therefore still be monitorable. Voltaic Performance. The operating cell voltage will be employed as a figure of merit in this case. Additionally, provision has been made for the employment of reference electrode probes which will be utilized to monitor each electrode indivi dually. Proposed Cell and System for Accelerated Testing The test system presently being assembled is shown in Figure 28-1. Provision has been made for both the collection of debris in a determinable (weighable) manner and for gas sampling. A more detailed drawing of the upper cell compartment proper is shown in Figure 28-2. The use of glass allows for ease of inspection while operating. The large 0.6in inter-electrode gap facilitates insertion of reference probes and the inspec tion mentioned. 28-7PDF Image | Development of the Zinc-Chlorine Battery for Utility
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