| 锂离子电池用Sn/C复合材料的碳热还原法制备(英文) | |
| Carbon-Thermal Synthesis of Sn/C Composites for Secondary Lithium-ion Batteries | |
| 摘要: 采用碳热还原法制备了Sn/C复合材料，通过XRD、SEM、恒流充放电循环、慢速扫描循环伏安(CV)等方法对材料以及其电化学嵌脱锂性能做了研究。结果表明：Sn球均匀分散在絮状碳材料中，加热时间越长，Sn球粒径越大。加热8 h得到材料的首次嵌锂比容量可达1 014 mAh·g-1，循环15周以后的嵌锂比容量为406 mAh·g-1。 | |
| 关键词: 锂离子电池 碳热还原 Sn/C复合材料 | |
| 基金项目: | |
| Abstract: Electrochemical active Sn/C composites were synthesized by carbon-thermal reduction method from SnO2 and C in Ar atmosphere at 950 ℃. The obtained composites were characterized by XRD and SEM. Lithium insertion/ extraction characteristics of the composites were examined by constant current charge-discharge and cyclic voltammetry methods(CV). The results show that Sn metal spheres are embedded in excessive flocculent carbon matrix homogeneously. The average size of Sn spheres becomes larger after heating for a longer time. Sn/C composite heated for 8 h exhibits initial lithium insertion specific capacity of 1 014 mAh·g-1 and the highest reversible lithium insertion specific capacity of 406 mAh·g-1 after 15 cycles coupled with a reasonable capacity retention(4%loss/cycle). | |
| Keywords: lithium-ion battery carbon-thermal synthesis Sn/C composite | |
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| 吴 锋,李艳红,吴 川,穆道斌,白 莹,吴生先.锂离子电池用Sn/C复合材料的碳热还原法制备(英文)[J].无机化学学报,2009,25(1):7-12. | |
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