Facile preparation of hierarchical CuO nanostructures as a integrate binder-free anode for high-performance lithium-ion batteries

Abstract

Novel CuO hybrid nanostructures composed of one-dimensional (ID) porous carbon nanofibers and two-dimensional (2D) graphene nanosheets have been fabricated with the help of electrospinning technique, which is denoted as CuO@PCNF/GN. The microstructure and morphology of the CuO@PCNF/GN were investigated by X-ray diffraction and transmission electron microscopy. The electrochemical performances of the as-prepared materials as a novel bind-free anode for lithium ion battery (LIB) were investigated. The CuO@PCNF/GN electrode exhibited high discharge capacity of 665 mAh g−1 after 60 cycles at the current density of 100 mA g−1. Even at 800 mA g−1, the discharge capacity of the anode could still maintained at 443 mAh g−1. The excellent electrochemical properties of CuO are greatly related to the unique 3D interconnected structure of continuous PCNF and GN, which enables efficient electron/ion transport and migrate the volume change of active CuO materials.

Monolithic three‐dimensional hollow nanoporous CuxO encapsulated mesoporous Cu heterostructures with superior Li storage properties

“…The nanostructured Cu x O can effectively increase the specific surface area and provide a larger amount of electrochemical active sites, which is favorable to improve the electrochemical performance. [19][20][21][22] As a result, various Cu x O nanostructures have received considerable attention and exploration, including nanoparticles, 23 nanowires, 24 nanorods, 25 and other unique structures such as porous, 26 hierarchical, 27 core-shell, 28 and hollow. 29 Particularly, numerous studies have proven that engineering hollow architecture is an effective and economical way.…”

“…Currently, some researchers have attempted to address these issues by nanocrystallization and structural modulation of Cu x O anode materials. The nanostructured Cu x O can effectively increase the specific surface area and provide a larger amount of electrochemical active sites, which is favorable to improve the electrochemical performance 19–22 . As a result, various Cu x O nanostructures have received considerable attention and exploration, including nanoparticles, 23 nanowires, 24 nanorods, 25 and other unique structures such as porous, 26 hierarchical, 27 core‐shell, 28 and hollow 29 .…”