A two-step method for the preparation of high performance corncob-based activated carbons as supercapacitor electrodes using ammonium chloride as a pore forming additive
Activated carbons were prepared from corncobs by an initial hydrothermal treatment using ammonium chloride as a pore forming additive and then by KOH activation. Samples were characterized by SEM, XRD, TG analysis and nitrogen adsorption. The effects of preparation conditions on the iodine number, y...
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| Published in | New carbon materials Vol. 33; no. 5; pp. 402 - 408 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier Ltd
01.10.2018
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1872-5805 1872-5805 |
| DOI | 10.1016/S1872-5805(18)60348-8 |
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| Abstract | Activated carbons were prepared from corncobs by an initial hydrothermal treatment using ammonium chloride as a pore forming additive and then by KOH activation. Samples were characterized by SEM, XRD, TG analysis and nitrogen adsorption. The effects of preparation conditions on the iodine number, yield and their electrochemical performance as supercapacitor electrodes were investigated. Results indicate that NH4Cl is helpful for the formation of activated carbons with a hierarchical pore structure. The best activated carbon prepared has a good rate performance with a capacitance of 175 F·g−1 at 0.5 A·g−1 and a capacitance retention ratio of 73.0% at 20 A·g−1, and a good cycling stability with a specific capacitance change from 175 to 173 F·g−1 after a 10 000 charge/discharge test. |
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| AbstractList | Activated carbons were prepared from corncobs by an initial hydrothermal treatment using ammonium chloride as a pore forming additive and then by KOH activation. Samples were characterized by SEM, XRD, TG analysis and nitrogen adsorption. The effects of preparation conditions on the iodine number, yield and their electrochemical performance as supercapacitor electrodes were investigated. Results indicate that NH4Cl is helpful for the formation of activated carbons with a hierarchical pore structure. The best activated carbon prepared has a good rate performance with a capacitance of 175 F·g−1 at 0.5 A·g−1 and a capacitance retention ratio of 73.0% at 20 A·g−1, and a good cycling stability with a specific capacitance change from 175 to 173 F·g−1 after a 10 000 charge/discharge test. |
| Author | Chen, Zhi-min Wang, Xiao-feng Wei, Qing-ling Wang, Zi-chen Yang, Xiao-min |
| Author_xml | – sequence: 1 givenname: Qing-ling surname: Wei fullname: Wei, Qing-ling organization: College of Chemistry, Jilin University, Changchun 130012, China – sequence: 2 givenname: Zhi-min surname: Chen fullname: Chen, Zhi-min organization: College of Chemistry, Jilin University, Changchun 130012, China – sequence: 3 givenname: Xiao-feng surname: Wang fullname: Wang, Xiao-feng organization: College of Chemistry, Jilin University, Changchun 130012, China – sequence: 4 givenname: Xiao-min surname: Yang fullname: Yang, Xiao-min email: xmyang@jlu.edu.cn organization: College of Chemistry, Jilin University, Changchun 130012, China – sequence: 5 givenname: Zi-chen surname: Wang fullname: Wang, Zi-chen organization: College of Chemistry, Jilin University, Changchun 130012, China |
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| Keywords | Ammonium chloride Electrochemical performance Hydrothermal method Corncob Activated carbon |
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| SubjectTerms | Activated carbon Ammonium chloride Corncob Electrochemical performance Hydrothermal method |
| Title | A two-step method for the preparation of high performance corncob-based activated carbons as supercapacitor electrodes using ammonium chloride as a pore forming additive |
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