Journal
ELECTROCHIMICA ACTA
Volume 135, Issue -, Pages 380-387Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.05.044
Keywords
Kenaf stem-derived carbon; 3D porous structure; Large mass loading; High areal capacitance; MnO2; Electrodeposition
Categories
Funding
- National Natural Science Foundation of China [21065005, 21165010]
- Science and Technology Support Program of Jiangxi Province [20123BBE50104, 20133BBE50008]
- Young Scientist Foundation of Jiangxi Province [20112BCB23006, 20122BCB23011]
- Foundation of Jiangxi Educational Committee [GJJ13243, GJJ13244]
- Open Project Program of Key Laboratory of Functional Small organic molecule, Ministry of Education, Jiangxi Normal University [KLFS-KF-201214, KLFS-KF-201218]
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Three-dimensional (3D) kenaf stem-derived porous carbon (PC) is considered to be a promising low-cost supporting material for application in energy storage devices. In this report, a simple and industry-scalable approach to prepare the hybrid (MnO2/3D-PC) of nanostructured MnO2 and 3D-PC has been developed. Such porous structures of the 3D-PC not only provided a conductive network to enhance the charge transport and mass transfer in the electrochemical process but also achieved a large MnLO2 mass loading capacity of 11.5 mg/cm(2,) which resulted in a high areal capacitance of 2.77 F/cm(2) at a scan rate of 1 mV/s. A specific capacitance of 416 Fig was obtained based on the mass loading of 2.52 mg/cm(2) at scan rate of 1 mV/s. Furthermore, the symmetrical supercapacitor based on the MnO2/3D-PC exhibited outstanding cycle performance with only 14% degradation after 1000 cycles under a large specific current density of 16 mA/cm(2). This research demonstrated that the 3D-PC was a good potential supporting material in energy conversion and storage devices. (C) 2014 Elsevier Ltd. All rights reserved.
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