Sea Urchin-Like MnO₂/Biomass Carbon Composite Electrode Material for High-Performance Supercapacitors

Figure 1

Schematic diagram of the process of preparing MnO₂ and MnO₂/BC electrode materials (a); the transmission images of the synthesized MnO₂ (b) and MnO₂/BC (c) are magnified transmission images with scales of (b-c) 500 nm and insets of 200 nm; XRD patterns of MnO₂ and MnO₂/BC (d).

(a)

(b)

(c)

(d)