| 论文题目 | Facile synthesis of metal disulfides nanoparticles encapsulated by amorphous carbon composites as high-performance electrode materials for lithium storage |
| 作 者 | Qian Li; Dongxia Yuan,Xuxu Wang,Hongjin Xue,Fei Liang,Dongming Yin, Limin Wang |
| 发表年度 | 2019 |
| 刊物名称 | Journal of Alloys and Compounds |
| 卷、期、页码 | ; 773; 97-104 |
| 影响因子 | |
| 论文摘要 | With the purpose to settle the aggregation and conductivity issues of the active materials, the metal disulfides (MS2, M ？ Fe, Co) nanoparticles in-situ encapsulated by amorphous carbon layers (MS2@C)have been synthesized by directly vulcanizing the iron (III) acetylacetonate or cobalt (II) acetylacetonate, which are both the metal source and carbon source, using sulfur power as S source and dispersant by a facile one-step heating method. A structure that MS2 nanoparticles are well wrapped by amorphous carbon layer uniformly coated by many ultra-small MS2 nanoparticles is obtained. Benefiting from the unique multidimensional structure that integrates the advantages of low-dimensional nanostructures and high-dimensional bulk structure, FeS2@C and CoS2@C composites evaluated as electrode materials for lithium storage exhibit superior electrochemical performance. After 100 charge-discharge cycles, this novel FeS2@C architecture delivers a reversible capacity of 829 mAh g 1 at 100 mA g 1. Moreover, a high specific capacity of 480 mAh g 1 for FeS2@C at 1000 mA g 1 after 500 cycles is obtained. As for CoS2@C composite, a high specific capacity of 481 mAh g 1 at 500 mA g 1 after 300 cycles is still displayed. This remarkable cycling property and superior rate capability demonstrate the potential applications for nextgeneration lithium-ion batteries. |
| 全文链接 | https://doi.org/10.1016/j.jallcom.2018.09.247 |
| 附件地址 |
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