科研之友
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摘要
Fe7S8@C nanospheres were prepared by a simple solid-solid reaction and showed a high specific capacity and an excellent high rate performance as the anode material in lithium ion batteries. The core-shell Fe7S8@C composites delivered a very high reversible capacity of 695 mA h g(-1) at 0.1 A g(-1) after 50 cycles between 0.01 and 3.00 V. The Fe7S8@C composites also showed a discharge plateau at 1.5 V, cycling between 1.20 and 2.50 V, and exhibited a specific capacity of 397 mA h g(-1) at 0.1 A g(-1) over 200 cycles, which is higher than the theoretical capacity of Li4Ti5O12 (about 175 mA h g(-1)).
- 出版日期2015
- 单位中国科学技术大学
