Nanocrystalline tin disulfide coating of reduced graphene oxide produced by the peroxostannate deposition route for sodium ion battery anodes
Nanocrystalline tin disulfide coating of reduced graphene oxide produced by the peroxostannate deposition route for sodium ion battery anodes
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DOI：
10.1039/c3ta15248k
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发表时间：
2014-01-01
影响因子：
11.9
通讯作者：
Lev, Ovadia
中科院分区：
文献类型：
--
作者：
Prikhodchenko, Petr V.;Yu, Denis Y. W.;Lev, Ovadia
通过从富含过氧化氢的溶液中将氢过氧锡酸盐沉积在氧化石墨烯上，然后硫化和300 ° C热处理来制备高度稳定的钠离子电池阳极。通过电子显微镜、粉末X射线衍射和X射线光电子能谱对材料进行表征，结果表明活性材料主要是菱面体SnS 2，其（001）面优先平行于氧化石墨烯片取向。该材料在相对于Na/Na+电极的0和2 V之间在50 mA g（-1）下表现出>610 mA h g（-1）的充电容量（具有>99.6%的充电效率），超过150次循环的高循环稳定性和非常好的倍率性能，在2000 mA g（-1）下>320 mA h g（-1）。
A highly stable sodium ion battery anode was prepared by deposition of hydroperoxostannate on graphene oxide from hydrogen-peroxide-rich solution followed by sulfidization and 300 degrees C heat treatment. The material was characterized by electron microscopy, powder X-ray diffraction and X-ray photoelectron spectroscopy which showed that the active material is mostly rhombohedral SnS2 whose (001) planes were preferentially oriented in parallel to the graphene oxide sheets. The material exhibited >610 mA h g(-1) charge capacity at 50 mA g(-1) (with >99.6% charging efficiency) between 0 and 2 V vs. Na/Na+ electrode, high cycling stability for over 150 cycles and very good rate performance, >320 mA h g(-1) at 2000 mA g(-1).