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Preparation of CoSnO 3 /CNTs/S and its Electrochemical Performance as Cathode Material for Lithium‐Sulfur Batteries
Author(s) -
Chen Jiale,
Bian Zhengxu,
Wu Mengrong,
Gao Mingyue,
Shi Jing,
Duan Mengting,
Guo Xingmei,
Liu Yuanjun,
Zhang Junhao,
Kong Qinghong
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202001081
Subject(s) - carbon nanotube , polysulfide , materials science , lithium–sulfur battery , cathode , sulfur , chemical engineering , electrochemistry , mesoporous material , nanotechnology , annealing (glass) , conductivity , composite material , electrode , chemistry , organic chemistry , catalysis , metallurgy , electrolyte , engineering
To address low electrical conductivity of sulfur and “poly‐sulfide shuttle” for constructing sulfur hosts with excellent cyclic stability, CoSnO 3 /CNTs composites are successfully synthesized by combining CoSnO 3 cubes and carbon nanotubes (CNTs) via coprecipitation and annealing process. CoSnO 3 cubes are bound by continuous carbon nanotube networks, with high specific surface area and vast mesoporous. CoSnO 3 with multiple polar active sites has a strong chemical adsorption effect on lithium polysulfide, suppressing the shuttle effect. The carbon nanotubes have continuous conductive networks, which can provide physical confinement with polysulfides and good electrical conductivity. Through the effective combination of advantages of CoSnO 3 and carbon nanotubes, CoSnO 3 /CNTs/S exhibits excellent sulfur storage performance. The maximum discharge capacity of CoSnO 3 /CNTs/S is 453.3 mAh g −1 at a current density of 0.2 C. After 500 cycles, the discharge specific capacity is still 377.7 mAh g −1 . The simple synthesis of CoSnO 3 /CNTs/S with long cycle life provides a new direction for the future LSBs cathode material research.