In contrast, LC-PB showed clear instability over the 8 cycles when studied by operando XANES, with 62.5% loss of capacity. (CV scans shown in Figure ). Changes to the CVs consist of a shift in peak potential by 0.08 V for PB → BG oxidation and a reduction in peak current magnitude. A shift to lower V for the BG reduction is also observed for the 1 st cycle, and then the peak position stabilized at 0.6 V but with a reduction in peak magnitude with increasing cycles. A minimal shift in peak potential was observed for the high spin redox couple, with a dramatic decrease in the magnitude of the features, which was particularly prominent for the current response associated with PW reduction to PB. Evidently a series of complex changes occur during cycling, which the operando XANES can help rationalize.