"Branched Co3O4/Fe2O3 nanow" by Hao Wu, Ming Xu et al.

Article Title

Branched Co₃O₄/Fe₂O₃ nanowires as high capacity lithium-ion battery anodes

Authors

Hao Wu, Laboratory of Advanced Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
Ming Xu, Laboratory of Advanced Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
Yongcheng Wang, Laboratory of Advanced Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
Gengfeng Zheng, Laboratory of Advanced Materials, Department of Chemistry, Fudan University, Shanghai 200433, China

Keywords

Co3O4, α-Fe2O3, nanowire, branched, lithium-ion battery, Nyquist plot

Abstract

We report a facile, two-step hydrothermal synthesis of a novel Co3O4/α-Fe2O3 branched nanowire heterostructure, which can serve as a good candidate for lithium-ion battery anodes with high Li+ storage capacity and stability. The single-crystalline, primary Co3O4 nanowire trunk arrays directly grown on Ti substrates allow for efficient electrical and ionic transport. The secondary α-Fe2O3 branches provide enhanced surface area and high theoretical Li+ storage capacity, and can also serve as volume spacers between neighboring Co3O4 NW arrays to maintain electrolyte penetration as well as reduce the aggregation during Li+ intercalation, thus leading to improved electrochemical energy storage performance.