SBES documented stable performance from
9th to 20th day of operation with marginal variations (Fig. 2a) followed by decreasing trend till 25th day of operation. From 26th
day of operation a visible drop in both OCV (286 mV) and PD
(21.3 mW/m2
) was observed, which reduced further on 30th day
(OCV, 67 mV and PD, 0.57 mW/m2
).