Flexible supercapacitor based on MnO2 coated laser carbonized electrodes
[摘要] This paper presents a facile, low-cost approach for fabrication of flexible hybrid carbon/ MnO2pseudo-capacitors. The highly porous carbon electrodes of the supercapacitor are fabricated by laser pyrolysis of polyimide-laminated copper sheet and subsequently coated with a uniform thin layer of MnO2. The porous laser carbonized polyimide provides a high effective surface area for the MnO2coating, resulting in an increase of 55% in the electrochemical performance of the supercapacitor. The fabricated device exhibits a specific capacitance of 7.1mFcm-2at a scan rate of 40mVs-1. Moreover, the copper backing film provides a proper electrical contact to the high surface area carbon/ MnO2composite for stability under mechanical deformation and low internal resistance.
[发布日期] [发布机构] Birck Nanotechnology Center, Purdue University, West Lafayette; IN; 47907, United States^1;School of Electrical and Computer Engineering, Purdue University, West Lafayette; IN; 47907, United States^2
[效力级别] 能源学 [学科分类]
[关键词] Effective surface area;Electrical contacts;Electrochemical performance;High surface area;Internal resistance;Mechanical deformation;Porous carbon electrodes;Specific capacitance [时效性]