多孔SnO_2花状微球的制备与电化学性能研究

Preparation and electrochemical property of porous SnO_2 flower-like microsphere

首次通过在空气中煅烧低温水热法制备SnS2前驱体获得了多孔花状SnO2微球。多孔SnO2花状微球保持了SnS2前驱体的形貌,并且在煅烧过程中纳米片上产生了丰富的孔结构,因此具有更大的比表面积。通过X射线衍射仪、场发射扫描电子显微镜、高分辨透射电子显微镜和同步热分析仪对样品进行了表征。电化学性能测试表明多孔花状SnO2微球具有较高的可逆容量和良好的循环性能。

The porous SnO2 flower-like microspheres were prepared for the first time by calcining the SnS2 precursor in the air which synthesized by low-temperature hydrothermal method. Porous SnO2 microspheres maintained a similar mor- phology of SnS2 precursor, and produced a wealth of pore structure on the nanosheet, resulting in a greater surface area. The samples were characterized By X-ray diffraction, field emission scanning electron microscopy, high resolution transmission electron microscopy and simultaneous thermal analysis. Electrochemical tests showed that the microspheres had high re- versible capacity and good cycling performance.