Abstract
? 2022 Elsevier B.V.Recently, cobalt (II, III) oxide (Co3O4) is considered as an alternative anode material for high-performance LIBs because of its high safety and theoretical capacity (890 mAh g?1). However, Co3O4 anode materials suffer from low conductivity and poor cycle life due to structural strain and huge volume change during lithiation/delithiation processes. In this work, porous N-doped graphitic carbon encapsulated Co3O4 structure (Co3O4 @PNGC) was synthesized by using mixed Zn and Co metal-organic frameworks templates (ZIF-67/ZIF-8) and coated with polydopamine as a nitrogen and carbon source. During the synthesis, Zn species was evaporated to form the structural pores, and the in-situ formation of Co(0) occurred that served as a catalyst in the graphitization of the carbon matrix. The Co3O4/PNGC exhibited an improved discharge capacity of 847.4 mAh g?1 after 500 cycles at 1 C when compared to the bare sample.
NSTL
Elsevier