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CoSnO 3 Nanocubes Wrapped by Carbon Nanofibers for Improving Lithium‐Sulfur Battery Performances
Author(s) -
Shi Jing,
Zhang Shuya,
Wang Jing,
Bian Zhengxu,
Duan Mengting,
Guo Xingmei,
Liu Yuanjun,
Zhang Junhao,
Kong Qinghong
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202102803
Subject(s) - carbon nanofiber , sulfur , calcination , materials science , nanofiber , cathode , chemical engineering , lithium (medication) , carbon fibers , electrospinning , conductivity , dissolution , lithium–sulfur battery , battery (electricity) , electrode , adsorption , nanotechnology , catalysis , chemistry , composite material , electrolyte , carbon nanotube , polymer , organic chemistry , composite number , metallurgy , endocrinology , engineering , power (physics) , quantum mechanics , medicine , physics
To solve the problem of low conductivity of sulfur and “shuttle effect” of lithium polysulfides, CoSnO 3 nanocubes wrapped by carbon nanofibers (CoSnO 3 @CNFs) are synthesized by co‐precipitation, electrospinning and calcination techniques. CoSnO 3 provides plentiful polar active sites, which restrains the dissolution of polysulfides with chemical interaction. Carbon nanofibers not only provide more ion transport channels, but also increase physical adsorption, provide active sites, and improve the conductivity of the electrode material. As a result, CoSnO 3 @CNFs can carry about 60 % sulfur as guest. Evaluated as cathode material for lithium‐sulfur batteries, CoSnO 3 @CNFs/S displayed an initial discharge capacity of 554.9 mA h g −1 at 0.2 C, and retained 300.0 mA h g −1 after 200 cycles. The simple synthesis method, high sulfur loading capacity and long cycle life make CoSnO 3 @CNFs extremely attractive for practical applications.