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采用十六烷基三甲基溴化铵(CTAB)为模板剂,磷酸三甲酯(C3H9O4P)为辅助模板剂,以二水合四氯化锡(SnCl4.2H2O)为锡源,在水溶液中用水热法合成了孔壁为结晶态多孔氧化锡纳米粒子团聚体.通过扫描电子显微镜(SEM),高分辨透射电子显微镜(HRTEM),X射线衍射(XRD),热分析,N2吸附脱附等对样品的结构和形貌进行了表征分析.结果表明:小分子磷酸三甲酯的加入能够很好地辅助四氯化锡在CTAB胶束附近的堆积,有利于提高材料的比表面积,并改善体系的热稳定性.进一步通过恒电流法研究了材料作为锂离子电池负极材料的电化学性能.经300℃煅烧处理的多孔氧化锡团聚体表现出了高的首次可逆脱锂容量(962.4 mAh/g),经分析原因发现,这是由于体系内残留的不完全燃烧的碳及材料本身的多孔结构引起的.综上可见,加入电负性较大的大体积反离子作为共模板剂可作为一种改善多孔金属氧化物材料性能的有益尝试.
Cetyltrimethylammonium bromide (CTAB) was used as a template and trimethyl phosphate (C3H9O4P) as a template. Tin (II) tetrachloride (SnCl4.2H2O) was used as a source of tin in aqueous solution, Thermally synthesized porous wall was porous aggregated tin oxide nanoparticle aggregates. The morphology of porous aggregates was characterized by scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), thermal analysis, N2 adsorption and desorption The structure and morphology of the samples were characterized and analyzed.The results showed that the addition of small molecule trimethyl phosphate can help the deposition of tin tetrachloride near the CTAB micelles and improve the specific surface area of the material and improve the system .The electrochemical properties of the material as negative electrode material of lithium ion battery were further studied by galvanostatic method.The porous tin oxide aggregates calcined at 300 ℃ showed high first reversible delithiation capacity (962.4 mAh / g ), The reasons for the analysis found that this is due to incomplete combustion of carbon remaining in the system and the porous structure of the material itself caused.In conclusion, adding a large negative ion electronegativity as a common mode plate can be used as a Improve the porous metal oxidation Material properties of the beneficial attempt.