Pulsed laser deposition of large-area manganese oxide nanosheet arrays for high-rate supercapacitors

A pulsed laser deposition process using ozone as an oxidant is developed to synthesize manganese oxide nanosheet arrays, which display excellent rate capability (52% capacity retention at 100 A g−1), comparable capacitance (337 F g−1 at 1 A g−1) and long cycle life (without degradation after 6000 cycles).