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

Scheme 1

Preparation procedure of boron-doped carbon nano-/microballs: (i) hydrothermal reaction, 180°C, washing with deionized water; (ii) pyrolysis, Ar, 800°C, 2 h; (iii) activation, ZnCl₂, Ar, 800°C, 2 h, washing with HCl (aq.), deionized water.