Electrophoretic deposition of hierarchical Co3O4@graphene hybrid films as binder-free anodes for high-performance lithium-ion batteries. Issue 42 (9th April 2015)

• Record Type: Journal Article
• Authors: Wu, Xiaoyu; Wang, Bo; Li, Songmei; Liu, Jianhua; Yu, Mei
• Is Part Of: RSC advances. Volume 5:Issue 42(2015)
• Page Start: 33438
• Page End: 33444
• Publication Date: 2015-04-09
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra02302e
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Hierarchical Co3 O4 @graphene hybrid films are deposited on copper foils as binder-free anodes for high-performance lithium-ion batteries. Abstract : A facile approach is developed for large-scale fabrication of Co3 O4 @graphene hybrid films via one-step electrophoretic deposition and subsequent thermal annealing. The formation mechanism was discussed in detail. The as-prepared hybrid films exhibit unique hierarchical morphology, in which the Co3 O4 nanoparticles with a size of 10–20 nm uniformly anchor on the surface and interlayer of graphene. When evaluated as binder-free anodes for lithium-ion batteries, the Co3 O4 @graphene hybrid films exhibit excellent lithium storage performance. Especially, the Co3 O4 @graphene hybrid films with 23.18 wt% graphene exhibited a high reversible capacity of 1059 mA h g −1 at a high current density of 500 mA g −1, a good capacity retention of 84.3% after 50 cycles, and excellent rate capability. It is worth mentioning that the content of graphene in the hybrid films plays a great role in its lithium storage performance due to its structural advantages and high conductivity.