TiS2-MWCNT hybrid as high performance anode in lithium-ion battery
TiS2-MWCNT hybrid as high performance anode in lithium-ion battery
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DOI：
10.1007/s11051-013-1950-5
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发表时间：
2013-09-01
影响因子：
2.5
通讯作者：
Mahanty, Sourindra
中科院分区：
文献类型：
--
作者：
Kartick, B.;Srivastava, Suneel Kumar;Mahanty, Sourindra
本文报道了以不同重量比的硫化钛（TiS 2）和多壁碳纳米管（MWCNTs）为原料，通过简单的干磨制备杂化材料并对其进行表征。X射线衍射和拉曼研究表明，存在的TiS 2和多壁碳纳米管之间的相互作用。场发射扫描电子显微镜和高分辨透射电子显微镜显示了TiS 2-MWCNT（1：1）杂化物的三维结构和共分散性。X射线光电子能谱也证实了存在的TiS 2和MWCNT在所制备的混合物。热重分析表明，随着MWCNT含量的增加，热稳定性增加。电化学分析结果表明，TiS 2-MWCNT（1：1）杂化材料作为锂离子电池负极的性能有所提高。发现初始比容量接近450 mAh g（-1），在50次放电-充电循环后容量保持80%。这些值与TiS 2、MWCNT或其他TiS 2-MWCNT混合物相比显著更高。这种改进的性能归因于TiS 2和MWCNT之间的协同效应的存在。
The present work reports the preparation of hybrids by simple dry grinding of titanium sulfide (TiS2) and multi-walled carbon nanotubes(MWCNTs) in different weight ratio and their characterization. X-ray diffraction and Raman studies indicated the presence of interaction between the TiS2 and MWCNT. Field emission scanning electron microscopy and high resolution transmission electron microscopy showed the formation of three-dimensional architecture and co-dispersion in TiS2-MWCNT (1:1) hybrid. X-ray photoelectron spectroscopy also confirmed the presence of TiS2 and MWCNT in the prepared hybrid. Thermogravimetric analysis indicated an increase in thermal stability with higher MWCNT content. The results of the electrochemical analyses indicated that TiS2-MWCNT (1:1) hybrid exhibited an enhanced performance as lithium-ion battery anode. The initial specific capacity was found to be approximate to 450 mAh g(-1) with 80 % retention in capacity after 50 discharge-charge cycles. These values are significantly higher compared to those for TiS2, MWCNT or other TiS2-MWCNT hybrids. Such improved performance is attributed to the presence of a synergistic effect between TiS2 and MWCNT.