Insight the effect of crystallinity of natural graphite on the electrochemical performance of reduced graphene oxide
The effects of the crystallinity of natural graphites on the electrochemical performance of the resulting reduced graphene oxides (RGOs) were systematically researched. Electrochemical measurements were first carried out to characterize the electrochemical performances of the RGOs. The results showe...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2018-12-01
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| Series: | Results in Physics |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379718317820 |
| _version_ | 1818930961324179456 |
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| author | Weijun Peng Guihong Han Yanfang Huang Yijun Cao Shaoxian Song |
| author_facet | Weijun Peng Guihong Han Yanfang Huang Yijun Cao Shaoxian Song |
| author_sort | Weijun Peng |
| collection | DOAJ |
| description | The effects of the crystallinity of natural graphites on the electrochemical performance of the resulting reduced graphene oxides (RGOs) were systematically researched. Electrochemical measurements were first carried out to characterize the electrochemical performances of the RGOs. The results showed that the RGO prepared from flaky graphite (FG) hold the best electrochemical performance with the greatest specific capacitance, the smallest charge transfer resistance (Rct), the best capacitive behavior, and the lowest ions diffusion resistance in comparison with the other RGOs synthesized from natural lumpy graphite (LG) and amorphous graphite (AG) under the same conditions. Furthermore, XPS and Raman analysis were conducted to scientifically explain the phenomena. The results illustrated that RGO prepared from FG (FRGO) hold the highest reduction degree, the greatest size of the in-plane sp2 domains, and the fewest defects, leading FRGO to hold the best electrochemical performance. The crystallinity of natural graphite affected the microstructure of the resulting RGO by influencing its oxidation, exfoliation and chemical reduction process, and then indirectly controlled the electrochemical properties of the RGO. Keywords: Reduced graphene oxide, Natural graphite, Crystallinity, Electrochemical performance |
| first_indexed | 2024-12-20T04:09:01Z |
| format | Article |
| id | doaj.art-2be8e43f718a4f7ea23c8d917523c334 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-12-20T04:09:01Z |
| publishDate | 2018-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-2be8e43f718a4f7ea23c8d917523c3342022-12-21T19:53:57ZengElsevierResults in Physics2211-37972018-12-0111131137Insight the effect of crystallinity of natural graphite on the electrochemical performance of reduced graphene oxideWeijun Peng0Guihong Han1Yanfang Huang2Yijun Cao3Shaoxian Song4School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, Henan 450001, PR ChinaSchool of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, Henan 450001, PR ChinaSchool of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, Henan 450001, PR ChinaSchool of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, Henan 450001, PR China; Henan Province Industrial Technology Research Institute of Research and Materials, Zhengzhou University, Zhengzhou, Henan 450001, PR China; Corresponding authors at: School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, Henan 450001, PR China (Y. Cao).School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei 430070, PR China; Corresponding authors at: School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, Henan 450001, PR China (Y. Cao).The effects of the crystallinity of natural graphites on the electrochemical performance of the resulting reduced graphene oxides (RGOs) were systematically researched. Electrochemical measurements were first carried out to characterize the electrochemical performances of the RGOs. The results showed that the RGO prepared from flaky graphite (FG) hold the best electrochemical performance with the greatest specific capacitance, the smallest charge transfer resistance (Rct), the best capacitive behavior, and the lowest ions diffusion resistance in comparison with the other RGOs synthesized from natural lumpy graphite (LG) and amorphous graphite (AG) under the same conditions. Furthermore, XPS and Raman analysis were conducted to scientifically explain the phenomena. The results illustrated that RGO prepared from FG (FRGO) hold the highest reduction degree, the greatest size of the in-plane sp2 domains, and the fewest defects, leading FRGO to hold the best electrochemical performance. The crystallinity of natural graphite affected the microstructure of the resulting RGO by influencing its oxidation, exfoliation and chemical reduction process, and then indirectly controlled the electrochemical properties of the RGO. Keywords: Reduced graphene oxide, Natural graphite, Crystallinity, Electrochemical performancehttp://www.sciencedirect.com/science/article/pii/S2211379718317820 |
| spellingShingle | Weijun Peng Guihong Han Yanfang Huang Yijun Cao Shaoxian Song Insight the effect of crystallinity of natural graphite on the electrochemical performance of reduced graphene oxide Results in Physics |
| title | Insight the effect of crystallinity of natural graphite on the electrochemical performance of reduced graphene oxide |
| title_full | Insight the effect of crystallinity of natural graphite on the electrochemical performance of reduced graphene oxide |
| title_fullStr | Insight the effect of crystallinity of natural graphite on the electrochemical performance of reduced graphene oxide |
| title_full_unstemmed | Insight the effect of crystallinity of natural graphite on the electrochemical performance of reduced graphene oxide |
| title_short | Insight the effect of crystallinity of natural graphite on the electrochemical performance of reduced graphene oxide |
| title_sort | insight the effect of crystallinity of natural graphite on the electrochemical performance of reduced graphene oxide |
| url | http://www.sciencedirect.com/science/article/pii/S2211379718317820 |
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