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Carbon‐Encapsulated SnO 2 Core–Shell Nanowires Directly Grown on Reduced Graphene Oxide Sheets for High‐Performance Li‐Ion Battery Electrodes
Author(s) -
Lee Sang Ho,
Noh Yuseong,
Jo YongRyun,
Kim Yoongon,
Kim BongJoong,
Kim Won Bae
Publication year - 2018
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201700804
Subject(s) - graphene , materials science , electrode , oxide , battery (electricity) , lithium (medication) , electrochemistry , lithium ion battery , nanowire , carbon fibers , tin , tin oxide , nanowire battery , tin dioxide , nanotechnology , chemical engineering , composite material , composite number , lithium vanadium phosphate battery , chemistry , metallurgy , medicine , power (physics) , physics , engineering , quantum mechanics , endocrinology
A designed electrode material of carbon‐encapsulated tin dioxide core–shell nanowires that are synthesized directly on reduced graphene oxide substrates is reported, and its application as a positive electrode material for lithium‐ion battery is shown. Each of the individual tin dioxide nanowires is wrapped with carbon shell layers and grown on a reduced graphene oxide substrate, which gives rise to structural benefits for electrochemical performance of the lithium‐ion battery. Such carbon structures allow the electrode materials to withstand the mechanical stress during repeated charge/discharge processes and facilitate the reaction kinetics for the lithiation/delithiation processes. In the electrochemical cell tests, the synergetic effect of the proposed electrode design is explicitly verified by presenting highly enhanced rate capability and cycle durability on full‐cell batteries as well as half‐cell tests.