title: Rational Design of Graphene-Reinforced MnO Nanowires with Enhanced Electrochemical Performance for Li-Ion Batteries.
abstract: Recently, transition metal oxides (TMOs) mixed with carbon materials have attracted attention as lithium-ion battery (LIB) anode materials. However, the aggregation issue in TMOs hinders the development of an ideal encapsulation structure with carbon materials. In this paper, we report graphene reinforced MnO nanowires with enhanced electrochemical performance as an anode in LIB. The graphene nanosheets (GNs)/MnO feature was confirmed by transmission electron microscopy, X-ray diffraction, Raman scattering, and X-ray photoelectron spectroscopy. The GNs/MnO nanowires delivered a highly stable discharge capacity of ∼815 mAh g(-1) at a current density of 100 mA g(-1) after 200 cycles, which is 1.5 times higher than that of pure MnO nanowires. This GNs/MnO structure with a specific capacity of ∼995 mAh g(-1) at a current density of 50 mA g(-1) also exhibited excellent Li storage properties. The superior cycling and high rate capability were attributed to the intimate incorporation between the MnO and GNs. The structure of the GNs/MnO nanowires effectively accommodated the volume change of the MnO nanowires and prevented structure collapse during cycling.
authors.affiliation: Department of Materials Science & Engineering, CAS Key Lab of Materials for Energy Conversion, Synergetic Innovation Center of Quantum Information Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Sun
authors.affiliation: Department of Materials Science & Engineering, CAS Key Lab of Materials for Energy Conversion, Synergetic Innovation Center of Quantum Information Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Zhijie
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Center of Electron Microscopy and State Key Laboratory of Silicon Materials, Department of Materials Science & Engineering, Zhejiang University , Hangzhou, Zhejiang 310027, China.
authors.forename: Zijiao
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Center of Electron Microscopy and State Key Laboratory of Silicon Materials, Department of Materials Science & Engineering, Zhejiang University , Hangzhou, Zhejiang 310027, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Yu
authors.affiliation: The Sixth Element Materials Technology Co. Ltd , Changzhou, Jiangsu 213145, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Qu
authors.affiliation: Molecular Foundry, Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, California 94720, United States.
authors.forename: Jingyu
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Materials Science & Engineering, CAS Key Lab of Materials for Energy Conversion, Synergetic Innovation Center of Quantum Information Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Department of Materials Science & Engineering, CAS Key Lab of Materials for Energy Conversion, Synergetic Innovation Center of Quantum Information Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Xiang
keywords: MnO; anode; graphene nanosheets; lithium-ion battery; nanowire morphology