The Capacitive Behaviors of Manganese Dioxide Thin-Film Electrochemical Capacitor Prototypes

Figure 1

TEM micrographs of (a) dispersed MnO₂ nanoparticles (scale bar is 50 nm; inset shows an individual MnO₂ nanoparticle with nanofibrillar structure), (b) aggregated MnO₂ nanoclusters (scale bar is 50 nm), and (c) longitudinal bundles of MnO₂ nanoclusters (scale bar is 0.2 μm)

(a)

(b)

(c)