Hydrothermal Synthesis of Nickel Oxide Nanosheets for Lithium‐Ion Batteries and Supercapacitors with Excellent Performance

Abstract

Abstract Nickel oxide nanosheets have been successfully synthesized by a facile ethylene glycol mediated hydrothermal method. The morphology and crystal structure of the nickel oxide nanosheets were characterized by X‐ray diffraction, field‐emission SEM, and TEM. When applied as electrode materials for lithium‐ion batteries and supercapacitors, nickel oxide nanosheets exhibited a high, reversible lithium storage capacity of 1193 mA h g −1 at a current density of 500 mA g −1 , an enhanced rate capability, and good cycling stability. Nickel oxide nanosheets also demonstrated a superior specific capacitance of 999 F g −1 at a current density of 20 A g −1 in supercapacitors.