Shape-Controlled Synthesis of 3D Hierarchical MnO2 Nanostructures for Electrochemical Supercapacitors

	Shape-Controlled Synthesis of 3D Hierarchical MnO2 Nanostructures for Electrochemical Supercapacitors
	Ma YW(马衍伟)
刊名	CRYSTAL GROWTH & DESIGN
	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).