摘要
以三甲基氯硅烷(TMCS)和氨丙基三乙氧基硅烷(APTS)进行外内表面修饰的SBA-15为模板,Co(NO3)2.6H2O为原料,成功地合成了Co3O4纳米线。采用透射电子显微镜(TEM)、N2吸附-脱附、X-射线衍射(XRD)等多种手段对修饰后的SBA-15和Co3O4纳米线进行表征。结果证明:内外表面修饰后的SBA-15仍为有序的介孔结构。合成的Co3O4纳米线具有面心立方结构,平均直径约4nm,长度约250-600nm。并将所制得Co3O4纳米线用作锂离子电池的正极材料,测试了Co3O4的电化学性能。结果表明:所得Co3O4纳米线电极的首次放电容量为1107 mAh.g-1,说明制备的Co3O4纳米线电极具有较好的大电流充放电性能。
Co3O4 nanowires were facilely synthesized by using mesoporous SBA-15 modified by trimethylchloro silane（TMCS） and aminopropyltriethoxyl silane（APTS） as a template,Co（NO3）2·6H2O as starting material.The modified SBA-15 and the resulting Co3O4 were characterized by X-ray diffraction（XRD）,Transmission electron microscopy（TEM） and Nitrogen adsorption surface and porosity measurements（BET）.The results show that the modified SBA-15 still has ordered mesoscopic architecture.The prepared Co3O4 nanowire has face-centered cubic structure.The average diameter of Co3O4 nanowire is 4 nm and the length of Co3O4 is in the range from 250-600 nm.The obtained Co3O4 nanowire was assembled as an anode material for lithium secondary battery,and its electrochemical property was measured.The results show that the initial discharge capacity is about 1107 mAh g-1,and lithium secondary battery exhibits better charge /discharge performance.
出处
《功能材料与器件学报》
CAS
CSCD
北大核心
2011年第2期142-146,共5页
Journal of Functional Materials and Devices
基金
江苏省高校自然科学基础研究项目(08KJB150005)
