A Comparison of Electrochemical Performance of Carbon Aerogels with Adsorption Metal Ions for Super Capacitors
Environmental problems caused by metal ions have caused widespread concern in recent years. In this work, carbon aerogels (CAs) adsorbing different metal ions were prepared. The adsorption performance and kinetics of metal ions (Cu(II), Cr(VI), and Fe(III)) on carbon aerogels were systematically inv...
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MDPI AG
2018-11-01
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| author | Xiaoxi Dong Yuelong Xu Shasha Wang Junping Zhao Bin Ren Lihui Zhang Zhenfa Liu |
| author_facet | Xiaoxi Dong Yuelong Xu Shasha Wang Junping Zhao Bin Ren Lihui Zhang Zhenfa Liu |
| author_sort | Xiaoxi Dong |
| collection | DOAJ |
| description | Environmental problems caused by metal ions have caused widespread concern in recent years. In this work, carbon aerogels (CAs) adsorbing different metal ions were prepared. The adsorption performance and kinetics of metal ions (Cu(II), Cr(VI), and Fe(III)) on carbon aerogels were systematically investigated. The results indicated that the maximum adsorption capacity of Cu(II) was 424 mg·g<sup>−1</sup> in 600 mg·L<sup>−1</sup> copper solution. Adsorption performances of Cu(II), Cr(VI), and Fe(III) on CAs well fitted with a pseudo-second-order kinetic model. The structures and morphologies of metal-containing samples were characterized by scanning electron micrographs (SEM), Energy Dispersive Spectrometer (EDS), transmission electron microscope (TEM), and X-ray diffraction (XRD). The results demonstrated that the texture and electrochemical performance of CAs adsorbing metal ions exhibited a clear change. The specific surface area of CAs for adsorbing copper ions was 450 m<sup>2</sup>·g<sup>−1</sup> and they showed a small average pore diameter (7.16 nm). Furthermore, CAs adsorbing metals could be used for the super capacitor. The specific capacitance of CAs adsorbing copper ions could reach 255 F·g<sup>−1</sup> at a current density of 1.0 A·g<sup>−1</sup>. The CA-Cu electrode materials exhibited excellent reversibility with a cycling efficiency of 97% after 5000 cycles. |
| first_indexed | 2024-04-12T10:53:58Z |
| format | Article |
| id | doaj.art-17af9c4296484816a3ef065657d80d00 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-12T10:53:58Z |
| publishDate | 2018-11-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-17af9c4296484816a3ef065657d80d002022-12-22T03:36:08ZengMDPI AGMaterials1996-19442018-11-011111227110.3390/ma11112271ma11112271A Comparison of Electrochemical Performance of Carbon Aerogels with Adsorption Metal Ions for Super CapacitorsXiaoxi Dong0Yuelong Xu1Shasha Wang2Junping Zhao3Bin Ren4Lihui Zhang5Zhenfa Liu6School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300000, ChinaInstitute of Energy Resources, Hebei Academy of Sciences, Shijiazhuang 050081, ChinaSchool of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300000, ChinaInstitute of Energy Resources, Hebei Academy of Sciences, Shijiazhuang 050081, ChinaInstitute of Energy Resources, Hebei Academy of Sciences, Shijiazhuang 050081, ChinaInstitute of Energy Resources, Hebei Academy of Sciences, Shijiazhuang 050081, ChinaSchool of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300000, ChinaEnvironmental problems caused by metal ions have caused widespread concern in recent years. In this work, carbon aerogels (CAs) adsorbing different metal ions were prepared. The adsorption performance and kinetics of metal ions (Cu(II), Cr(VI), and Fe(III)) on carbon aerogels were systematically investigated. The results indicated that the maximum adsorption capacity of Cu(II) was 424 mg·g<sup>−1</sup> in 600 mg·L<sup>−1</sup> copper solution. Adsorption performances of Cu(II), Cr(VI), and Fe(III) on CAs well fitted with a pseudo-second-order kinetic model. The structures and morphologies of metal-containing samples were characterized by scanning electron micrographs (SEM), Energy Dispersive Spectrometer (EDS), transmission electron microscope (TEM), and X-ray diffraction (XRD). The results demonstrated that the texture and electrochemical performance of CAs adsorbing metal ions exhibited a clear change. The specific surface area of CAs for adsorbing copper ions was 450 m<sup>2</sup>·g<sup>−1</sup> and they showed a small average pore diameter (7.16 nm). Furthermore, CAs adsorbing metals could be used for the super capacitor. The specific capacitance of CAs adsorbing copper ions could reach 255 F·g<sup>−1</sup> at a current density of 1.0 A·g<sup>−1</sup>. The CA-Cu electrode materials exhibited excellent reversibility with a cycling efficiency of 97% after 5000 cycles.https://www.mdpi.com/1996-1944/11/11/2271carbon aerogelsadsorption behaviormetal ionssuper capacitorelectrochemical performance |
| spellingShingle | Xiaoxi Dong Yuelong Xu Shasha Wang Junping Zhao Bin Ren Lihui Zhang Zhenfa Liu A Comparison of Electrochemical Performance of Carbon Aerogels with Adsorption Metal Ions for Super Capacitors Materials carbon aerogels adsorption behavior metal ions super capacitor electrochemical performance |
| title | A Comparison of Electrochemical Performance of Carbon Aerogels with Adsorption Metal Ions for Super Capacitors |
| title_full | A Comparison of Electrochemical Performance of Carbon Aerogels with Adsorption Metal Ions for Super Capacitors |
| title_fullStr | A Comparison of Electrochemical Performance of Carbon Aerogels with Adsorption Metal Ions for Super Capacitors |
| title_full_unstemmed | A Comparison of Electrochemical Performance of Carbon Aerogels with Adsorption Metal Ions for Super Capacitors |
| title_short | A Comparison of Electrochemical Performance of Carbon Aerogels with Adsorption Metal Ions for Super Capacitors |
| title_sort | comparison of electrochemical performance of carbon aerogels with adsorption metal ions for super capacitors |
| topic | carbon aerogels adsorption behavior metal ions super capacitor electrochemical performance |
| url | https://www.mdpi.com/1996-1944/11/11/2271 |
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