title: Graphene-Encapsulated Nanosheet-Assembled Zinc-Nickel-Cobalt Oxide Microspheres for Enhanced Lithium Storage.
abstract: The appropriate combination of hierarchical transition-metal oxide (TMO) micro-/nanostructures constructed from porous nanobuilding blocks with graphene sheets (GNS) in a core/shell geometry is highly desirable for high-performance lithium-ion batteries (LIBs). A facile and scalable process for the fabrication of 3D hierarchical porous zinc-nickel-cobalt oxide (ZNCO) microspheres constructed from porous ultrathin nanosheets encapsulated by GNS to form a core/shell geometry is reported for improved electrochemical performance of the TMOs as an anode in LIBs. By virtue of their intriguing structural features, the produced ZNCO/GNS core/shell hybrids exhibit an outstanding reversible capacity of 1015 mA h g(-1) at 0.1 C after 50 cycles. Even at a high rate of 1 C, a stable capacity as high as 420 mA h g(-1) could be maintained after 900 cycles, which suggested their great potential as efficient electrodes for high-performance LIBs.
authors.affiliation: Department of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong.|School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, 30332-0245, GA, USA.
authors.forename: Qiaobao
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen, 361005, P.R. China.
authors.forename: Huixin
authors.initials: H
authors.lastname: Chen
authors.affiliation: Semiconductor Photonics Research Center, Department of Physics, Xiamen University, Xiamen, 361005, P.R. China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Han
authors.affiliation: Department of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong.
authors.forename: Junjie
authors.initials: J
authors.lastname: Cai
authors.affiliation: State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen, 361005, P.R. China. yyang@xmu.edu.cn.
authors.forename: Yong
authors.initials: Y
authors.lastname: Yang
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, 30332-0245, GA, USA. meilin.liu@mse.gatech.edu.
authors.forename: Meilin
authors.initials: M
authors.lastname: Liu
authors.affiliation: Department of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong. kaizhang@cityu.edu.hk.
authors.forename: Kaili
authors.initials: K
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D002214:Capsules; D003035:Cobalt / Q000737:chemistry; D011211:Electric Power Supplies; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D008863:Microspheres; D008958:Models, Molecular; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D013997:Time Factors; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: D002214:Capsules; D010087:Oxides; D003035:Cobalt; D006108:Graphite; D009532:Nickel; D008094:Lithium; C028007:nickel monoxide; D009584:Nitrogen; D015034:Zinc Oxide; C060728:cobalt oxide
keywords: electrochemistry; graphene; lithium; microporous materials; nanostructures