| 摘要: |
| 利用水热法合成了纳米棒状的MnO2/碳纳米球(CNPs)作为电化学超级电容器的电极材料.利用场发射扫描电镜(FESEM)、X射线衍射光谱分析(XRD)对样品的微观形貌、物相进行分析;利用循环伏安法和恒电流充放电测试材料的电化学性能.结果表明:纳米棒状MnO2/CNPs复合材料具有良好的电化学性能.在0.1 A/g的电流密度,1 mol/L Na2>SO4电解液中,电极材料的比电容高达305.6 F/g,远高于纯碳球的比电容(49.3 F/g),当电流密度增至5 A/g时,材料的比电容为235 F/g,比电容仍能保持76.9%. |
| 关键词: 水热合成 MnO2/CNPs 电化学超级电容器 电极材料 |
| DOI： |
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| 基金项目: |
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| Preparation and property study of MnO2/CNPs as electrode materials of electrochemical supercapacitors |
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JIANG Chao, LI Jun, TAO Lingling, HUANG Jinping
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College of Life and Environmental Sciences,Shanghai Normal University
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| Abstract: |
| MnO2 nanorods deposited on carbon nanospheres (MnO2/CNPs) as electrode materials of electrochemical supercapacitors have been synthesized via a hydrothermal synthesis.The micro morphologies and phases of the as-prepared MnO2/CNPs were characterized by field emission scanning electro microscopy(FESEM) and X-ray diffraction(XRD).The electrochemical properties of nanomaterials were tested by cyclic voltammetry and galvanostatic charge-discharge.At a current density of 0.1 A/g using 1 mol/L Na2SO4 as electrolyte,the as-prepared MnO2/CNPs exhibit excellent specific capacitance of 305.6 F/g,far larger than carbon nanospheres (49.3 F/g).At a current density of 5 A/g,the specific capacitance of MnO2/CNPs is 235 F/g,which is 76.9% of the specific capacitance under 1 A/g current density.These results demonstrated that MnO2/CNPs may show potential application for electrode materials in electrochemical supercapacitors. |
| Key words: hydrothermal synthesis MnO2/CNPs electrochemical supercapacitor electrode material |
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