Carbon-Coated SnS Nanosheets Supported on Porous Microspheres as Negative Electrode Material for Sodium-Ion Batteries

Suning Gao, Liangtao Yang, Zaichun Liu, Jie Shao, Qunting Qu, Masud Hossain, Yuping Wu, Philipp Adelhelm, Rudolf Holze

Результат исследований: Научные публикации в периодических изданияхстатья

2 Цитирования (Scopus)

Аннотация

SnS has outstanding theoretical capacity and is a promising electrode material for sodium-ion batteries. However, intrinsic low conductivity and huge volume changes upon sodium extraction/insertion limit its application. Herein, hierarchical hollow carbon spheres covered with S,N-doped carbon-coated SnS nanosheets synthesized by a multistep process are reported, including a hard sacrificial template, hydrothermal reaction, and annealing treatment. The prepared C@SnS@C samples are characterized by X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. The nanosized SnS provides capacity; S,N-doped carbon coating protects the integrated structure. Consequently, due to the compositional and structural merits, the optimized electrode has a high specific capacity of around 420 mAh g−1 at 0.2 A g−1, high rate performance (200 mAh g−1 at 10 A g−1), and good cycling stability with 95% (i.e., 305 mAh g−1 at 0.5 A g−1) of the initial capacitance after 100 cycles. Kinetic analyses reveal that a substantial capacitive contribution results in better rate performance of the C@SnS@C electrode.

Язык оригиналаанглийский
Номер статьи2000258
ЖурналEnergy Technology
Том8
Номер выпуска7
DOI
СостояниеОпубликовано - 1 июл 2020

Предметные области Scopus

  • Энергия (все)

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