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Eco-Friendly Synthesis of Self-Supported N‑Doped Sb2S3‑Carbon Fibers with High Atom Utilization and Zero Discharge for Commercial Full Lithium-Ion Batteries
journal contribution
posted on 2020-07-09, 19:44 authored by Hong Yin, Kwan San Hui, Xun Zhao, Shiliang Mei, Xiaowei Lv, Kwun Nam Hui, Jun ChenAntimony
trisulfide (Sb2S3) is a prospective
electrode material for lithium-ion batteries (LIBs) because of its
thermal stability, low price, and high specific capacity. However,
the commercialization of Sb2S3 as an anode material
is greatly hindered by its poor electronic conductivity and massive
volume variation during charge/discharge cycles. Moreover, growing
demand in reducing greenhouse gas emission requires the material preparation
process to be pollution free and highly energy efficient. Herein,
we introduce, for the first time, an eco-friendly and highly efficient
one-step annealing method to construct a three-dimensional (3D) flexible
conductive network and buffer matrix for N-doped Sb2S3-carbon fibers (NSSCs) as a high-performance anode. It is
assembled by mixing sulfur and antimony in the atomicity level with
a stoichiometric ratio as the electrospinning precursor and then annealed
in a sealed quartz tube to assure the high atom utilization of nitrogen
and sulfur. Benefiting from the 3D structure and compositional advantages,
the NSSC electrode with improved conductivity and carbon buffer matrix
exhibits superior Li-storage performance. As a result, this work not
only promotes the commercialization of antimony trisulfide but also
points out a general eco-friendly method, which can be widely applied
to synthesize a variety of flexible metal sulfides and metal nitrides
with high atom utilization and zero discharge.