Nanostructured Manganese oxide Films for High performance Supercapacitors

摘要

Nanostructured manganese oxide films, including continuous coating, nanoflower film and nanowallarray, were electrodeposited on nickel foils via anodic electrodeposition. The as-prepared samples weretested as electrodes for supercapacitors and excellent capacitive performances were achieved. Amongthem, the nanowall array, which was composed of interconnected ultrathin nanosheets, exhibited thehighest specific capacitance of 327 F g-1 at 1 A g-1. The specific capacitance could retain as high as 317F g-1 after 1000 cycles. The superior capacitance performance can be attributed to its uniquenanoporous structure which facilitates fast ion transportation.