title: Flexible CuO nanosheets/reduced-graphene oxide composite paper: binder-free anode for high-performance lithium-ion batteries.
abstract: Flexible free-standing CuO nanosheets (NSs)/reduced graphene oxide (r-GO) hybrid lamellar paper was fabricated through vacuum filtration and hydrothermal reduction processes. A unique three-dimensional nanoporous network was achieved with CuO NSs homogeneously embedded within the r-GO layers. This hybrid lamellar composite paper was examined as a binder-free anode for lithium ion batteries, and demonstrated excellent cyclic retention with the specific capacity of 736.8 mA h g(-1) after 50 cycles. This is much higher than 219.1 mA h g(-1) of the pristine CuO NSs and 60.2 mA h g(-1) of r-GO film at the same current density of 67 mA g(-1). The high capacitance and excellent cycling performance were generated from the integrated nanoporous structure compose of CuO NSs spaced r-GO layers, which offered an efficient electrically conducting channels, favored electrolyte penetration, and buffered to the volume variations during the lithiation and delithiation process. These outstanding electrochemical capabilities of CuO NSs/r-GO paper holds great promise for flexible binder-free anode for lithium ion batteries.
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering ‡Department of Physics & State Key Laboratory of Silicon Materials, and §Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University , Hangzhou 310027, P. R. China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Lin
authors.initials: L
authors.lastname: Gu
authors.forename: Yewu
authors.initials: Y
authors.lastname: Wang
authors.forename: Yulong
authors.initials: Y
authors.lastname: Ying
authors.forename: Yiyin
authors.initials: Y
authors.lastname: Mao
authors.forename: Luwei
authors.initials: L
authors.lastname: Sun
authors.forename: Xinsheng
authors.initials: X
authors.lastname: Peng