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4cc ccc~c~o(■6cc~oo'o i)r>56ooo'0c ........ .................................E5IERLlse..ANCIJL........................................ ........ RBJtlTgDJN-U-S.Ai.. ___ _______________U-10-50 ^ c~c C cuc^c/Q 0,; ’ CHARGE ~>'C^^ CC C'C°C00000 TIME — hours Figure 32-4. Voltage-Time Profile for Various Electrode Heights Coulombic Efficiency vs. Electrode Height. The electrode-height effect on cell performance was also evaluated by comparing the coulombic performance of the 6" and 8" electrode cells to the basic 4" electrode cell. Table 32-3 compares the coulombic efficiencies of the 8", 6", and 4" electrode cells. The 8" and 6" elec trode cells offer an average coulombic efficiency of 67%, which is similar to that offered by the 4" electrode cell. Within experimental error, it is concluded that no significant loss in coulombic performance is indicated up to an electrode height of 8". Weight Distribution of Zinc Deposit 2 Under the standard test conditions, i.e. 2M ZnCl^; 30mA/cm ; T = 30°C; and 2.4-2.5g/£ of chlorine concentration, the zinc plates of the 4", 6", and 8" electrodes at a 2 charge capacity of 120mAh/cm , i.e. 4 hour charge, were peeled from the substrates for weight analysis. Table 32-4 shows the weight of each zinc plate from the 6" electrode cell and the statistical analysis with reference to the electrode 32-9 DISCHARGE : (a.) 8” ELECTRODE, 0.60" STATIC HEAD (b.) 6" ELECTRODE, 0.38' STATIC HEAD (c.) 4" ELECTRODE, 0.30" STATIC HEADPDF Image | Development of the Zinc-Chlorine Battery for Utility
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