Synthesis and Electrochemical Characterization of Mesoporous MnO2
The pore, crystal structure, and electrochemical performance of mesoporous MnO2 prepared by silica sol template method as electrode material for supercapacitor were investigated in this work. It is found that the crystal structure of nonporous and mesoporous MnO2 is confirmed to be β-MnO2 and the cr...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2015/768023 |
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| author | Jia Chang Zhao Jun Wang Jing Li Xu |
| author_facet | Jia Chang Zhao Jun Wang Jing Li Xu |
| author_sort | Jia Chang Zhao |
| collection | DOAJ |
| description | The pore, crystal structure, and electrochemical performance of mesoporous MnO2 prepared by silica sol template method as electrode material for supercapacitor were investigated in this work. It is found that the crystal structure of nonporous and mesoporous MnO2 is confirmed to be β-MnO2 and the crystallinity of mesoporous MnO2 decreases due to the formation of mesopore. The results of electrochemical performance show that the specific capacitances of the sample prepared by using 20 g of Mn(NO3)2 solution and 40 g of silica sol (named MMO-4) at the scan rate of 5 mV/s are the highest (163.2 F/g), in comparison with 19.3 F/g of that of the sample of blank, suggesting the important role of pore-forming using silica sol as template. As the potential scan rate is raised to 200 mV/s, the specific capacitances of the sample of blank and MMO-4 are 12.2 F/g and 21.6 F/g, respectively. The great improvement of specific capacitance is probably due to the enlarged activated surface area after template is added. |
| format | Article |
| id | doaj-art-d6dc507f7e5c46acbe90f0d00b9b4dad |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-d6dc507f7e5c46acbe90f0d00b9b4dad2025-02-03T01:33:00ZengWileyJournal of Chemistry2090-90632090-90712015-01-01201510.1155/2015/768023768023Synthesis and Electrochemical Characterization of Mesoporous MnO2Jia Chang Zhao0Jun Wang1Jing Li Xu2College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaCollege of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaCollege of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaThe pore, crystal structure, and electrochemical performance of mesoporous MnO2 prepared by silica sol template method as electrode material for supercapacitor were investigated in this work. It is found that the crystal structure of nonporous and mesoporous MnO2 is confirmed to be β-MnO2 and the crystallinity of mesoporous MnO2 decreases due to the formation of mesopore. The results of electrochemical performance show that the specific capacitances of the sample prepared by using 20 g of Mn(NO3)2 solution and 40 g of silica sol (named MMO-4) at the scan rate of 5 mV/s are the highest (163.2 F/g), in comparison with 19.3 F/g of that of the sample of blank, suggesting the important role of pore-forming using silica sol as template. As the potential scan rate is raised to 200 mV/s, the specific capacitances of the sample of blank and MMO-4 are 12.2 F/g and 21.6 F/g, respectively. The great improvement of specific capacitance is probably due to the enlarged activated surface area after template is added.http://dx.doi.org/10.1155/2015/768023 |
| spellingShingle | Jia Chang Zhao Jun Wang Jing Li Xu Synthesis and Electrochemical Characterization of Mesoporous MnO2 Journal of Chemistry |
| title | Synthesis and Electrochemical Characterization of Mesoporous MnO2 |
| title_full | Synthesis and Electrochemical Characterization of Mesoporous MnO2 |
| title_fullStr | Synthesis and Electrochemical Characterization of Mesoporous MnO2 |
| title_full_unstemmed | Synthesis and Electrochemical Characterization of Mesoporous MnO2 |
| title_short | Synthesis and Electrochemical Characterization of Mesoporous MnO2 |
| title_sort | synthesis and electrochemical characterization of mesoporous mno2 |
| url | http://dx.doi.org/10.1155/2015/768023 |
| work_keys_str_mv | AT jiachangzhao synthesisandelectrochemicalcharacterizationofmesoporousmno2 AT junwang synthesisandelectrochemicalcharacterizationofmesoporousmno2 AT jinglixu synthesisandelectrochemicalcharacterizationofmesoporousmno2 |