Boron-Doped Carbon Nano-/Microballs from Orthoboric Acid-Starch: Preparation, Characterization, and Lithium Ion Storage Properties

Figure 4

(a) Cyclic voltammograms at a scan rate of 0.5 mV s^–1 of BC; (b) rate performance at different current densities from 0.2–10 C of BC; (c) cycleability and Columbic efficiency at 0.5 C of BC.

(a)

(b)

(c)