| 模板法制备的掺镧氧化镍多孔空心微球及电化学电容性能 |
| La Doped NiO Microporous Hollow Spheres by Template Method and Its Electrochemical Capacitive Properties |
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| 摘要: 采用模板法在水热条件下合成了掺La的NiO多孔空心球。采用X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电镜(SEM)、透射电子显微镜(TEM)和X射线能谱(EDS)对其结构和形貌进行了表征。采用循环伏安、恒流充放电技术对其电化学性能进行了测试，研究结果表明，La掺杂对NiO空心球的粒径、壳层厚度和电化学性能均有显著影响，当La掺杂量为1.30mol%时，掺杂后NiO的单电极比电容达到205 F·g-1，比未掺杂的提高了50%，并且表现出良好的循环稳定性和可逆性。 |
| 关键词: 模板法 水热 NiO空心球 La掺杂 电容性能 |
| 基金项目: |
| Abstract: Lanthanum doped nickel oxide using colloidal carbon spheres as hard template was developed to prepare NiO∶La3+ microporous hollow spheres. The morphology and structure of the product was characterized by X-ray diffraction(XRD), X-ray photoelectron spectrometer(XPS), scanning and transmission electron microscopies(SEM, TEM) and energy dispersive spectrometer (EDS). Their electrochemical performance as a supercapacitor electrode material was investigated comparatively by cyclic voltammetry(CV), galvanostatic charge-discharge. The experimental results indicated that La-doping did not change the structure of NiO, but greatly affected the particle size and the thickness of the shell, considerably enhanced the electrochemical performance of NiO. A specific capacitance of 205 F·g-1 was obtained when the mole ratio of La ion was 1.30%, which was 50% higher than that of the undoped material. Moreover, La-doping significantly improved the capacitance stability and reversibility. |
| Keywords: template method hydrothermal NiO hollow electrochemical capacitance |
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| 韩丹丹,景晓燕,王 君,张密林.模板法制备的掺镧氧化镍多孔空心微球及电化学电容性能[J].无机化学学报,2012,28(8):1547-1554. |
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