Nanoarchitectonics on residual carbon from gasification fine slag upon two step low temperature activation for application in supercapacitors
Summary: In this paper, the carbon electrode materials were prepared by the KOH-HNO3 low-temperature activation technique using cheap residual carbon from gasification fine slag (CK) as raw materials. The results showed that the prepared material (CKN-2) which obtained by dry-wet sequential activati...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | iScience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004223022630 |
| _version_ | 1827765185124761600 |
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| author | Jiaqi Zhu Jinling Song Baobao Han Jianmin Gao Zhongyi Liu Yao Wang Guoxiang Xin |
| author_facet | Jiaqi Zhu Jinling Song Baobao Han Jianmin Gao Zhongyi Liu Yao Wang Guoxiang Xin |
| author_sort | Jiaqi Zhu |
| collection | DOAJ |
| description | Summary: In this paper, the carbon electrode materials were prepared by the KOH-HNO3 low-temperature activation technique using cheap residual carbon from gasification fine slag (CK) as raw materials. The results showed that the prepared material (CKN-2) which obtained by dry-wet sequential activation at 500°C for 1.5 h at carbon to KOH ratio of 1:2 and further at 80°C for 1 h in 2 mol/L HNO3 solution. The specific capacitance of CKN-2 reached 142 F/g at a current density of 0.5 A/g. CKN-2 was used to assemble a symmetrical (CKN-2//CKN-2) supercapacitor, which exhibited an energy density of 6.80 Wh/kg at a power density of 244.8 W/kg. The CKN-2//CKN-2 capacitor was tested for stability after 10,000 cycles, with a capacitance retention rate of 97%. These results demonstrate that residual carbon from gasification fine slag can be effectively used to produce high-performance carbon electrode materials for supercapacitors using the KOH-HNO3 low-temperature sequential co-activation technique. |
| first_indexed | 2024-03-11T11:15:32Z |
| format | Article |
| id | doaj.art-73579a85da584921a0d9187df697560b |
| institution | Directory Open Access Journal |
| issn | 2589-0042 |
| language | English |
| last_indexed | 2024-03-11T11:15:32Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj.art-73579a85da584921a0d9187df697560b2023-11-11T04:28:29ZengElsevieriScience2589-00422023-11-012611108186Nanoarchitectonics on residual carbon from gasification fine slag upon two step low temperature activation for application in supercapacitorsJiaqi Zhu0Jinling Song1Baobao Han2Jianmin Gao3Zhongyi Liu4Yao Wang5Guoxiang Xin6School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, ChinaSchool of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China; Corresponding authorSchool of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, ChinaInner Mongolia Bdsd Chemical Co, Ltd, Inner Mongolia 017004, ChinaInner Mongolia Bdsd Chemical Co, Ltd, Inner Mongolia 017004, ChinaInner Mongolia Bdsd Chemical Co, Ltd, Inner Mongolia 017004, ChinaSchool of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, ChinaSummary: In this paper, the carbon electrode materials were prepared by the KOH-HNO3 low-temperature activation technique using cheap residual carbon from gasification fine slag (CK) as raw materials. The results showed that the prepared material (CKN-2) which obtained by dry-wet sequential activation at 500°C for 1.5 h at carbon to KOH ratio of 1:2 and further at 80°C for 1 h in 2 mol/L HNO3 solution. The specific capacitance of CKN-2 reached 142 F/g at a current density of 0.5 A/g. CKN-2 was used to assemble a symmetrical (CKN-2//CKN-2) supercapacitor, which exhibited an energy density of 6.80 Wh/kg at a power density of 244.8 W/kg. The CKN-2//CKN-2 capacitor was tested for stability after 10,000 cycles, with a capacitance retention rate of 97%. These results demonstrate that residual carbon from gasification fine slag can be effectively used to produce high-performance carbon electrode materials for supercapacitors using the KOH-HNO3 low-temperature sequential co-activation technique.http://www.sciencedirect.com/science/article/pii/S2589004223022630Energy storageMaterials scienceEnergy materials |
| spellingShingle | Jiaqi Zhu Jinling Song Baobao Han Jianmin Gao Zhongyi Liu Yao Wang Guoxiang Xin Nanoarchitectonics on residual carbon from gasification fine slag upon two step low temperature activation for application in supercapacitors iScience Energy storage Materials science Energy materials |
| title | Nanoarchitectonics on residual carbon from gasification fine slag upon two step low temperature activation for application in supercapacitors |
| title_full | Nanoarchitectonics on residual carbon from gasification fine slag upon two step low temperature activation for application in supercapacitors |
| title_fullStr | Nanoarchitectonics on residual carbon from gasification fine slag upon two step low temperature activation for application in supercapacitors |
| title_full_unstemmed | Nanoarchitectonics on residual carbon from gasification fine slag upon two step low temperature activation for application in supercapacitors |
| title_short | Nanoarchitectonics on residual carbon from gasification fine slag upon two step low temperature activation for application in supercapacitors |
| title_sort | nanoarchitectonics on residual carbon from gasification fine slag upon two step low temperature activation for application in supercapacitors |
| topic | Energy storage Materials science Energy materials |
| url | http://www.sciencedirect.com/science/article/pii/S2589004223022630 |
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