Ordered mesoporous carbon CMK-8 cathodes for high-power and long-cycle life sodium hybrid capacitors
| Autor: | Min Kyung Gong, Yun-Sung Lee, Chang Hyun Ko, Tuan Ngoc Phan, Ranjith Thangavel |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention symbols.namesake Adsorption law Materials Chemistry Carbonization Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Anode Capacitor chemistry Chemical engineering Mechanics of Materials Electrode symbols 0210 nano-technology Raman spectroscopy Carbon |
| Zdroj: | Journal of Alloys and Compounds. 743:639-645 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2018.02.007 |
| Popis: | Electrochemical energy storage (EES) devices with simultaneous high energy and high power output are critical in next-generation smart applications. Sodium hybrid capacitors (NHCs) are relatively new devices integrating the functions of batteries and capacitors. Research on capacitor-type carbon electrodes in NHCs is necessary to improve the energy-power behavior. Herein, we study ordered mesoporous carbon (OMC) materials synthesized at different temperatures (600 °C, 750 °C, and 900 °C) utilizing the KIT-6 silica template applied as adsorption cathodes for NHCs, paired with the superionic conductor Na3V2(PO4)3 as the anode material. Raman measurement indicates that the degree of graphitization is maximized at 750 °C. As a result, the OMC carbonized at 750 °C delivered the best performance among three OMCs, with a high energy density (54 W h kg−1), high power (2200 W kg−1) and superior stability (5000 cycles). The current research demonstrates a new platform for utilizing OMCs as adsorption electrodes in NHCs to realize a high-energy, high-power, and highly stable storage devices. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect