Effects of porous hedgehog-like morphology and graphene oxide on the cycling stability and rate performance of Co3O4/NiO microspheres

Guozhen Zhu; Xinsong Xu; Yiyao Zhang; Jiale Lian; Yuhan Li; Zhen Yang; Renchao Che

doi:10.1039/d4nh00504j

Effects of porous hedgehog-like morphology and graphene oxide on the cycling stability and rate performance of Co₃O₄/NiO microspheres

Nanoscale Horiz. 2025 Jan 27. doi: 10.1039/d4nh00504j. Online ahead of print.

Authors

Guozhen Zhu¹, Xinsong Xu², Yiyao Zhang¹, Jiale Lian¹, Yuhan Li¹, Zhen Yang¹, Renchao Che²

Affiliations

¹ School of Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China. zhuguozhen@jxnu.cn.
² Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai 200438, P. R. China. rcche@fudan.edu.cn.

PMID: 39866082
DOI: 10.1039/d4nh00504j

Abstract

A porous hedgehog-like Co₃O₄/NiO/graphene oxide (denoted as PHCNO/GO) microsphere was prepared by a facile solvothermal method, followed by an annealing treatment under argon atmosphere. Benefiting from the thin Co₃O₄/NiO nanosheets with a large specific surface area, abundant pores distributed between the Co₃O₄/NiO nanosheets, and GO firmly wrapped around the surface of PHCNO microspheres, the PHCNO/GO microspheres showed excellent lithium storage performance. The Co₃O₄/NiO nanosheets provided numerous active sites, achieving a high reversible specific capacity. The pores distributed between the Co₃O₄/NiO nanosheets created numerous diffusion pathways for lithium ions and relieved stress from the charging/discharging process. Meanwhile, GO supported the PHCNO microspheres, enhancing their cycling stability. A high reversible specific capacity of 383.9 mA h g^-1 was maintained after 1000 cycles at 3000 mA g^-1. In addition, GO improved the conductivity of PHCNO microspheres and then achieved a good rate performance; a high reversible specific capacity of 526.7 mA h g^-1 was obtained at 5000 mA g^-1. This work provided a reference for synthesizing high-performance lithium-ion battery anode materials.