3D-hierarchical SnS2 micro/nano-structures: controlled synthesis, formation mechanism and lithium ion storage performances
3D-hierarchical SnS2 micro/nano-structures: controlled synthesis, formation mechanism and lithium ion storage performances
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DOI：
10.1039/c1ce05950e
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发表时间：
2012-01
期刊：
影响因子：
3.1
通讯作者：
J. Zai;Xuefeng Qian;Kaixue Wang;Chao Yu;Liqi Tao;Yinglin Xiao;Jie‐Sheng Chen
中科院分区：
文献类型：
--
作者：
J. Zai;Xuefeng Qian;Kaixue Wang;Chao Yu;Liqi Tao;Yinglin Xiao;Jie‐Sheng Chen
通过控制SnCl4和L-半胱氨酸的比例，一锅水热法成功地合成了三种三维层次化SnS2微/纳米结构。结果表明，得到的SnS2三维层次化结构在化学成分、结晶性质、构筑单元、组装形式和孔道结构等方面存在较大差异。对层状结构的形成过程进行了较好的研究，并提出了可能的机制。通过充放电测试和循环伏安法研究了这些三维层次型SnS2结构的储锂性能。结果表明，电极材料的结晶性能会影响初始的电化学反应活性，小尺寸的积木块可以大大提高电化学反应的可逆性和倍率性能。此外，由三维层次结构衍生的大比表面积、多孔结构和自由空间有利于电极材料的长期循环稳定性。
Three kinds of 3D-hierarchical SnS2 micro/nano-structures were successfully synthesized through a one-pot hydrothermal method by controlling the ratio of SnCl4 and L-cysteine. It was found that these obtained 3D-hierarchical SnS2 structures had great differences in their chemical composition, crystalline property, building blocks, assembling format and porous structure. The formation processes of the hierarchical structures were studied well and the possible mechanisms were also proposed. The lithium storage properties of these 3D-hierarchical SnS2 structures were carefully studied by charge-discharge test and cyclic voltammetry method. The results indicated that the crystalline properties of the electrode materials could influence the initial electrochemical reactivity and the small size of building blocks could greatly improve the reversibility of electrochemical reaction and rate performances. Furthermore, the large surface area, porous structure and free space derived from the 3D hierarchical structures were beneficial to the long-term cycling stability of electrode materials.