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Graphene‐Encapsulated Nanosheet‐Assembled Zinc–Nickel–Cobalt Oxide Microspheres for Enhanced Lithium Storage
Author(s) -
Zhang Qiaobao,
Chen Huixin,
Han Xiang,
Cai Junjie,
Yang Yong,
Liu Meilin,
Zhang Kaili
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201501151
Subject(s) - materials science , nanosheet , graphene , lithium (medication) , anode , nickel , cobalt , oxide , chemical engineering , nanotechnology , zinc , electrochemistry , mesoporous material , fabrication , porosity , nanostructure , nanoparticle , transition metal , cobalt oxide , electrode , metallurgy , catalysis , composite material , chemistry , organic chemistry , medicine , alternative medicine , pathology , endocrinology , engineering
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.