title: One-Pot Synthesis of Copper Sulfide Nanowires/Reduced Graphene Oxide Nanocomposites with Excellent Lithium-Storage Properties as Anode Materials for Lithium-Ion Batteries.
abstract: Copper sulfide nanowires/reduced graphene oxide (CuSNWs/rGO) nanocompsites are successfully synthesized via a facile one-pot and template-free solution method in a dimethyl sulfoxide (DMSO)-ethyl glycol (EG) mixed solvent. It is noteworthy that the precursor plays a crucial role in the formation of the nanocomposites structure. SEM, TEM, XRD, IR and Raman spectroscopy are used to investigate the morphological and structural evolution of CuSNWs/rGO nanocomposites. The as-fabricated CuSNWs/rGO nanocompsites show remarkably improved Li-storage performance, excellent cycling stability as well as high-rate capability compared with pristine CuS nanowires. It obtains a reversible capacity of 620 mAh g(-1) at 0.5C (1C = 560 mA g(-1)) after 100 cycles and 320 mAh g(-1) at a high current rate of 4C even after 430 cycles. The excellent lithium storage performance is ascribed to the synergistic effect between CuS nanowires and rGO nanosheets. The as-formed CuSNWs/rGO nanocomposites can effectively accommodate large volume changes, supply a 2D conducting network and trap the polysulfides generated during the conversion reaction of CuS.
authors.affiliation: †School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing, 100081, People's Republic of China.|‡Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 70R108B, Berkeley, California 94720, United States.
authors.forename: Caihong
authors.initials: C
authors.lastname: Feng
authors.affiliation: †School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing, 100081, People's Republic of China.
authors.forename: Le
authors.initials: L
authors.lastname: Zhang
authors.affiliation: †School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing, 100081, People's Republic of China.
authors.forename: Menghuan
authors.initials: M
authors.lastname: Yang
authors.affiliation: ‡Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 70R108B, Berkeley, California 94720, United States.
authors.forename: Xiangyun
authors.initials: X
authors.lastname: Song
authors.affiliation: ‡Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 70R108B, Berkeley, California 94720, United States.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhao
authors.affiliation: ‡Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 70R108B, Berkeley, California 94720, United States.
authors.forename: Zhe
authors.initials: Z
authors.lastname: Jia
authors.affiliation: †School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing, 100081, People's Republic of China.
authors.forename: Kening
authors.initials: K
authors.lastname: Sun
authors.affiliation: ‡Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 70R108B, Berkeley, California 94720, United States.
authors.forename: Gao
authors.initials: G
authors.lastname: Liu
keywords: copper sulfide; lithium-ion battery; nanocomposites; reduced oxide graphene; synergistic effect