Low-temperature synthesis of nanosized disordered carbon spheres as an anode material for lithium ion batteries
Low-temperature synthesis of nanosized disordered carbon spheres as an anode material for lithium ion batteries
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DOI：
10.1016/j.matlet.2007.01.054
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发表时间：
2007-08
影响因子：
3
通讯作者：
Zonghui Yi;Yongguang Liang;Xuefeng Lei;Chiwei Wang;Ju-tang Sun
中科院分区：
文献类型：
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作者：
Zonghui Yi;Yongguang Liang;Xuefeng Lei;Chiwei Wang;Ju-tang Sun
采用水热反应法制备了纳米级无序碳。x射线衍射研究表明碳结构高度无序。SEM和TEM结果表明，这些无序碳具有完美的球形形貌，表面光滑，粒径均匀，约为100 nm。并对产物的插锂性能进行了研究。结果表明，在第一次循环中，产品的插锂容量为1233 mA h g−1，插锂容量为491 mA h g−1。随后的循环效率显著提高，第10次循环效率达到98%。讨论了这类碳的微观结构、形貌和电化学行为之间的关系。
Disordered carbons in the order of nanometers were prepared by a hydrothermal reaction route. X-ray diffraction studies indicated a highly disordered carbon structure. SEM and TEM results revealed that these disordered carbons have a perfect spherical morphology, smooth surface and uniform particle size of about 100 nm. The lithium intercalation property of the products was also investigated. The results showed that the products delivered lithium insertion and deinsertion capacities of 1233 and 491 mA h g−1respectively during the first cycle. Subsequent cycles showed a remarkable improvement in cycling efficiency with a 10th cycle efficiency of 98%. The correlation between microstructure, morphology and electrochemical behavior of such carbons was discussed.