Preparation and property study of MnO₂/CNPs as electrode materials of electrochemical supercapacitors

• Main Authors: JIANG Chao, LI Jun, TAO Lingling, HUANG Jinping
• Format: Article
• Language: English
• Published: Academic Journals Center of Shanghai Normal University 2016-12-01
• Series: Journal of Shanghai Normal University (Natural Sciences)
• Subjects: hydrothermal synthesis; MnO₂/CNPs; electrochemical supercapacitor; electrode material
• Online Access: http://qktg.shnu.edu.cn/zrb/shsfqkszrb/ch/reader/create_pdf.aspx?file_no=201606005&flag=1&year_id=2016&quarter_id=6
• ISSN: 1000-5137; 1000-5137

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.