fig9
Figure 9. SEM images (A), XRD (B), and XPS (C) analyses of disassembled positive and negative electrodes from hybrid supercapacitors after 10C charge-discharge cycling at different temperatures. SEM: Scanning electron microscopy; XRD: X-ray diffraction; XPS: X-ray photoelectron; NCM: nickel cobalt manganese; AC: activated carbon; HC: hard carbon.
