Shape-Controlled Synthesis of 3D Hierarchical MnO2 Nanostructures for Electrochemical Supercapacitors | |
Ma YW(马衍伟) | |
刊名 | CRYSTAL GROWTH & DESIGN
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2009 | |
通讯作者 | 马衍伟 |
中文摘要 | A simple hydrothermal method has been used to fabricate sea urchin shaped alpha-MnO2 without using any template and surfactant. When other conditions were kept the same and Al3+ exists in the solution, the product is alpha-MnO2 nanorods clusters; when Al3+ was substituted by Fe3+ in the solution, the phase of the products was transformed from alpha-MnO2 to epsilon-MnO2; relatively, the morphology of the product was changed from urchinlike clusters to 3D clewlike. The sea urchin shaped alpha-MnO2 and alpha-MnO2 nanorods clusters consist of radially grown single crystalline MnO2 nanorods of ca. 30-40 nm in diameter and ca. 0.87-1.2 mu m in length. The 3D clewlike epsilon-MnO2 nanostructures are composed of nanosheets with a thickness of about 17 nm. The electrochemical properties of the prepared MnO2 materials were studied using cyclic voltammetry (CV) and ac impedance measurements in aqueous electrolyte. 3D clewlike epsilon-MnO2 nanostructures have a specific capacitance of 120 F g(-1) and lower charge-transfer resistance. The results indicate that metal ions (Fe3+, Al3+) have great effects on the structure and morphology of MnO2. |
学科主题 | 材料合成与加工工艺 |
收录类别 | 1 |
公开日期 | 2010-09-29 |
附注 | A simple hydrothermal method has been used to fabricate sea urchin shaped alpha-MnO2 without using any template and surfactant. When other conditions were kept the same and Al3+ exists in the solution, the product is alpha-MnO2 nanorods clusters; when Al3+ was substituted by Fe3+ in the solution, the phase of the products was transformed from alpha-MnO2 to epsilon-MnO2; relatively, the morphology of the product was changed from urchinlike clusters to 3D clewlike. The sea urchin shaped alpha-MnO2 and alpha-MnO2 nanorods clusters consist of radially grown single crystalline MnO2 nanorods of ca. 30-40 nm in diameter and ca. 0.87-1.2 mu m in length. The 3D clewlike epsilon-MnO2 nanostructures are composed of nanosheets with a thickness of about 17 nm. The electrochemical properties of the prepared MnO2 materials were studied using cyclic voltammetry (CV) and ac impedance measurements in aqueous electrolyte. 3D clewlike epsilon-MnO2 nanostructures have a specific capacitance of 120 F g(-1) and lower charge-transfer resistance. The results indicate that metal ions (Fe3+, Al3+) have great effects on the structure and morphology of MnO2. |
内容类型 | 期刊论文 |
源URL | [http://ir.iee.ac.cn/handle/311042/333] ![]() |
专题 | 电工研究所_超导材料及强磁场科学研究组_超导材料及强磁场科学研究组_期刊论文 |
推荐引用方式 GB/T 7714 | Ma YW. Shape-Controlled Synthesis of 3D Hierarchical MnO2 Nanostructures for Electrochemical Supercapacitors[J]. CRYSTAL GROWTH & DESIGN,2009. |
APA | 马衍伟.(2009).Shape-Controlled Synthesis of 3D Hierarchical MnO2 Nanostructures for Electrochemical Supercapacitors.CRYSTAL GROWTH & DESIGN. |
MLA | 马衍伟."Shape-Controlled Synthesis of 3D Hierarchical MnO2 Nanostructures for Electrochemical Supercapacitors".CRYSTAL GROWTH & DESIGN (2009). |
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