Metal phosphosulfides (MPSs) are members of a category
of emerging
energy storage and conversion materials, particularly having significant
potentials in lithium storage due to their phosphorus and sulfur dual
anion centers and unique two-dimensional channels. Nevertheless, it
is still very challenging for the controllable design and synthesis
of MPSs nanomaterials with complex-element components. Herein, a distinctive
carbon confined mesoporous catkin-like SnPS3 nanostructure
(SnPS3@C) is controllably synthesized and fabricated based
on the partial volatilization of the reduced tin and the following
bottom-up phosphosulfuration by a chemical vapor deposition method.
As the anode material of lithium ion batteries, the catkin-like SnPS3@C offers multiple active centers for lithium insertion, complete
carbon shell to protect inner active materials, interlaced fibrous
networks for efficient electron transfer as well as abundant inner
mesopores for Li+ diffusion and volume buffer, thus showing
prominent structure advantages in lithium storage. The catkin-like
SnPS3@C electrode demonstrated superior electrochemical
capability with a very high reversible capacity (1302 mAh g–1 at 300 mA g–1), excellent rate property (630 mAh
g–1 at 8000 mA g–1) and distinguished
cycling stability (1030 mAh g–1 after 1000 cycles
at 1000 mA g–1). This work offers a new avenue to
develop high-performance MPSs materials for advanced lithium ion batteries.
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