Strongly coupled polypyrrole/molybdenum oxide hybrid films via electrochemical layer-by-layer assembly for pseudocapacitors

A strongly coupled layer-by-layer (LbL) PPy/MoOx hybrid film is demonstrated. The spectroscopy results indicate the protonation level of PPy is enhanced and the valence state of Mo in MoOx is reduced, which synergistically improve the charge transfer kinetics of the composites.