2020 Fiscal Year Research-status Report
Designing of super carbon materials for ionic liquid-based supercapacitors by template carbon method
| Project/Area Number |
20K22458
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| Research Institution | Tohoku University |
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Principal Investigator |
唐 睿 東北大学, 材料科学高等研究所, 助手 (70880144)
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| Project Period (FY) |
2020-09-11 – 2022-03-31
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| Keywords | template carbon / supercapacitors / ionic liquid |
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| Outline of Annual Research Achievements |
Content: The synthesis of a series of template carbons was achieved by tuning the chemical vapor deposition time period. The carbon structures were characterized by X-ray diffraction, thermogravimetry, nitrogen adsorption-desorption, Raman spectroscopy, and temperature-programmed desorption. The preliminary electrochemical performance was evaluated by using cyclic voltammetry in a three-electrode cell.
Importance: Template carbons with controllable pore size, graphene stacking number, and edge sites were successfully synthesized. Especially the number of edge sites was quantified. According to the electrochemical performance, carbons with fewer edge sites show improved stability in the ionic liquid-based supercapacitors. Based on this result, a new record of high working voltage is promising.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The synthesis of template carbons is already accomplished. By carefully selecting the preparation conditions, a better understanding of how synthesizing conditions affect the final structure of carbon materials is achieved. The electrochemical performance gives clear direction for the selecting of good carbon materials for ionic liquid-based supercapacitors. The edge-free carbon material is promising for having a high working voltage.
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| Strategy for Future Research Activity |
1. Test the performance of templated carbons in ionic liquid-based supercapacitors in a two-electrode testing cell. The cyclic voltammetry, long-term charge/discharge, and electrochemical impedance will be tested.
2. Confirm the highest working voltage that the templated carbons can achieve.
3. Compare four different types of ionic liquids.
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