کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6464988 | 1422946 | 2018 | 7 صفحه PDF | دانلود رایگان |
- CoS2/C assembled by CoS2 nanoparticles anchored on spongy carbon is presented.
- As anode materials for LIBs/SIBs, the composite shows good performances.
- This synthesis route can be used to synthesize other metal sulfides composite.
A spongy CoS2/carbon composite assembled from CoS2 nanoparticles (â¼20 nm) homogeneously anchored on a spongy carbon matrix was synthesized through a facile freeze-drying method and a hydrothermal process. As anode material for lithium/sodium ion batteries (LIBs/SIBs), this composite shows significantly enhanced lithium/sodium storage performance with the synergetic effects due to the electrical conductivity of the carbon matrix and the porous structure, which provide buffer spaces for volume expansion during charge/discharge processes and feasible transfer pathways for electrons/ions. The electrochemical results demonstrate that the spongy CoS2/carbon composite is an outstanding anode material for LIBs and SIBs. It delivers a high specific capacity of 610 mAh gâ1 at 500 mA gâ1 after 120 cycles in LIBs and 330 mAh gâ1 at 500 mA gâ1 after 60 cycles in SIBs, respectively. Moreover, the freeze-drying/hydrothermal process developed in this work could be useful for the construction of many other high-capacity metal sulfide composites as electrode materials for sodium ion batteries.
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Journal: Chemical Engineering Journal - Volume 332, 15 January 2018, Pages 370-376