Journal
APPLIED SURFACE SCIENCE
Volume 473, Issue -, Pages 799-806Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2018.12.254
Keywords
One-dimensional; Fe7S8@C nanorods; Anode; Rate performance; Lithium-ion batteries
Categories
Funding
- National Natural Science Foundation of China [21671160]
- Defense Industrial Technology Development Program [JCKY2016208B012]
- Thousand Talents Program in Sichuan Province
- Longshan Talent Program of Southwest University of Science and Technology
- Southwest University of Science and Technology analytical and testing centre
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One-dimensional (1D) Fe7S8@C nanorods for high-performance Li storage were successfully designed and manufactured via the hydrothermal method and subsequent poly(dopamine) coating. The carbon coating obtained via high-temperature carbonisation significantly enhanced the conductivity of iron sulfide (Fe7S8@C nanorods). In addition, the 1D material had relatively high stability. Therefore, the combination of 1D materials and the carbon structure (Fe7S8@C nanorods) not only improved the intercalation and deintercalation of Li ions but also had outstanding stability. When used as an anode material for LIBs, the Fe7S8@C nanorods maintained a discharge capacity of 825.45 mA h g(-1) after 100 cycles at a current density of 100 mA g(-1), showing excellent cyclic stability and capacity retention. More importantly, the Fe7S8@C nanorods exhibited a very high reversible capacity (433.31 mA h g(-1)) even after 1000 cycles at a high current density of 2000 mA g(-1) . These results indicate that this unique 1D carbon coating structure can effectively improve the electrochemical performance of materials. Moreover, the results show that the prepared Fe7S8@C nanorods have broad application prospects for LIBs.
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