期刊
APPLIED SURFACE SCIENCE
卷 599, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2022.154042
关键词
Lithium-ion batteries; Spindle-like structure; Anode material; Fe7S8/C@rGO; Reduced graphene oxide
类别
资金
- National Natural Science Foundation of China [51572012]
Transition metal sulfide has been anticipated as a promising anode material for high performance lithium-ion batteries. In this study, a spindle-like Fe7S8/C@rGO composite was synthesized and showed superior electrochemical properties and extraordinary electrical conductivity. The addition of rGO effectively increased the extra reversible capacity of Fe7S8/C@rGO.
Transition metal sulfide, as a highly anticipated anode material for high performance lithium-ion batteries (LIBs). Ingenious structural design and reasonable surface modification are used to inhibit the volume expansion of transition metal sulfide during cycling and improve its specific capacity. In this work, a spindle-like Fe7S8/ C@rGO composite was synthesized by two-step hydrothermal method. The prepared anode material shows superior electrochemical properties and extraordinary electrical conductivity. Which delivering a considerable specific capacity of 1465.1 mAh g(-1) at 0.1A g(-1) after 150 cycles and an impressively long cycle life with a capacity of 689.4 mAh g(-1) at 1 A g(-1) after 100 cycles. These satisfactory performances are attributed to the special nanostructure and the addition of rGO. In addition, the pseudocapacitive behavior effectively increases the extra reversible capacity of Fe7S8/C@rGO. This practical synthesis strategy provides a novel way to pursue extraordinary performance anode materials for lithium-ion batteries.
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