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Synthesis of SnS2 nanosheets and their electrochemical performances
used as anode materials of Li-ion battery |
MA Lin1,2, LI Hui2, CHANG Kun2, LI He3, CHEN Wei-xiang2 |
1. Chemistry Science and Technology School, Zhanjiang Normal University, Zhanjiang 524048, Chian; 2. Department
of Chemistry, Zhejiang University, Hangzhou 310027, China; 3. College of Biology and Environmental Engineering,
Zhejiang Shuren University, Hangzhou 310015, China |
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Abstract SnS2 nanosheets were prepared by the hydrothermal reaction of mixture solution of SnCl4 and L-cysteine, and characterized by XRD and TEM. The influences on the products and their morphologies of the mol ratio of SnCl4 to L-cysteine were investigated. It was found that the mixture of SnS2 and SnO2 nanoparticles was obtained when the mol ratio of SnCl4 to L-cysteine was 1∶2, and SnS2 nanosheets were obtained when the mol ratio of SnCl4 to L-cysteine was 1∶4~1∶6. Electrochemical tests demonstrated that the SnS2 exhibited high reversible capacity and good cycling performances used as anode materials of Li-ion battery. Its reversible capacity was 480 and 407 mAh/g, respectively, at the first and 80th cycle.
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Published: 17 March 2011
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水热合成纳米片状SnS2及其电化学贮放锂性能
用四氯化锡(SnCl4)和L-半胱氨酸(L-Cys)的水热反应合成纳米片状的SnS2,用X-射线衍射(XRD)和透射电镜(TEM)对其微观结构和形貌进行表征.讨论了SnCl4与L-Cys物质的量比对产物及其形貌的影响.结果显示,当SnCl4与L-Cys的物质的量比为1∶2,得到的产物是SnS2和SnO2纳米粒子的混合物;当SnCl4与L-Cys的物质的量比为1∶4~1∶6,得到的产物是纳米片状的SnS2.电化学测试结果显示,纳米片状SnS2作为锂离子电池负极材料具有较高的可逆容量和良好的循环稳定性,其初始容量为480 mAh/g,80次循环后其容量为407 mAh/g.
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