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Synthesis of TiC Nanoparticles Anchored on Hollow Carbon Nanospheres for Enhanced Polysulfide Adsorption in Li–S Batteries
Author(s) -
Cao Bokai,
Chen Yong,
Li De,
Yin Lihong,
Mo Yan
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.201601145
Subject(s) - polysulfide , nanoparticle , adsorption , materials science , chemical engineering , carbon fibers , nanotechnology , chemistry , electrode , composite number , organic chemistry , composite material , engineering , electrolyte
Abstract A novel spatial confinement strategy based on a carbon/TiO 2 /carbon sandwich structure is proposed to synthesize TiC nanoparticles anchored on hollow carbon nanospheres (TiC@C) through a carbothermal reduction reaction. During the synthesis process, two carbon layers not only serve as reductant to convert TiO 2 into TiC nanoparticles, but also create a spatial confinement to suppress the aggregation of TiO 2 , resulting in the formation of well‐dispersed TiC nanoparticles. This unique TiC@C structure shows an outstanding long‐term cycling stability at high rates owing to the strong physical and chemical adsorption of lithium polysulfides (i.e., a high capacity of 732.6 mA h g −1 at 1600 mA g −1 ) and it retains a capacity of 443.2 mA h g −1 after 1000 cycles, corresponding to a decay rate of only 0.0395 % per cycle. Therefore, this unique TiC@C composite could be considered as an important candidate for the cathode material in Li–S batteries.