期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 763, 期 -, 页码 90-96出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2015.12.046
关键词
Loofah sponge; Porous carbon; MnO2; Asymmetric supercapacitor
资金
- National Natural Science Foundation of China [51372071, 21201058, 21401048]
- Natural Science Foundation of Heilongjiang Province of China [B201412]
- China Postdoctoral Science Foundation [2014M551285, 2015T80374]
The development and utilization of biomass materials for high-performance energy storage electrode materials that meet the urgent need for green and sustainable development strategies are required. In this study, we developed a simple thermal treatment method for the formation of porous carbon (PC) from loofah sponge. An asymmetric supercapacitor was then assembled depending on the loofah sponge-derived PC@MnO2 and N-doped PC, providing high energy and power density than MnO2. The working voltage of the designed asymmetric device could reach 1.8 V and exhibited excellent performance such as a high capacitance of 78.2 F g(-1) at a current density of 1 A g(-1) in 1.0 M Na2SO4 aqueous electrolyte, a relatively high energy density of 34.7 Wh kg(-1) and power density 26.8 kW kg(-1). In addition, the device exhibited good electrochemical stability, with approximately 91.2% retention of initial specific capacitance after 2000 cycles. The asymmetric supercapacitor represents an exciting direction for enhancing the electrochemical performance of supercapacitors and designing next-generation high-performance energy storage devices. (C) 2015 Elsevier B.V. All rights reserved.
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