EDLC Characteristics of Carbon Materials Prepared from Coal Extract
HPC is an ashless coal obtained via the thermal extraction of coal and is soluble in organic solvents. In this study, carbon powder was prepared from the HPC/pyridine solution via precipitation using water as a poor solvent and was subsequently carbonized via heat treatment at 900°C. The evaluation...
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| Format: | Article |
| Language: | English |
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The Electrochemical Society of Japan
2020-05-01
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| Series: | Electrochemistry |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/electrochemistry/88/3/88_20-63011/_pdf/-char/en |
| _version_ | 1797969816533860352 |
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| author | Hiroki WATANABE Tomoki TSUMURA Masahiro TOYODA |
| author_facet | Hiroki WATANABE Tomoki TSUMURA Masahiro TOYODA |
| author_sort | Hiroki WATANABE |
| collection | DOAJ |
| description | HPC is an ashless coal obtained via the thermal extraction of coal and is soluble in organic solvents. In this study, carbon powder was prepared from the HPC/pyridine solution via precipitation using water as a poor solvent and was subsequently carbonized via heat treatment at 900°C. The evaluation of the pore characteristics of the obtained carbon powder revealed that the carbon powders mainly contained micropores. The average pore diameter (Dave) of the micropores was 0.75 nm, suggesting that they are super-micropores or ultra-micropores. The applicability of the carbon powder was verified by examining the EDLC characteristics. The capacitance of the EDLC containing the aqueous solution of H2SO4 as the electrolyte was 170 F cm−3 (200–210 F g−1) at a current density of 50 mA g−1, denoting a capacitance similar to that of the activated carbon powder (YP-50F). The capacitance was 140 F cm−3 (170 F g−1) even when the current density increased from 50 to 5000 mA g−1, indicating a high retention rate of approximately 80%. Subsequently, the capacitance became 210 F cm−3 (260 F g−1) when the CO2 activation treatment was conducted for 60 or 90 min. Therefore, a high yield of carbon powders with extremely fine pores can be easily obtained via precipitation using HPC as the raw material. |
| first_indexed | 2024-04-11T03:07:25Z |
| format | Article |
| id | doaj.art-9908b1783cfb480cb1ecbbdf8d687f4b |
| institution | Directory Open Access Journal |
| issn | 2186-2451 |
| language | English |
| last_indexed | 2024-04-11T03:07:25Z |
| publishDate | 2020-05-01 |
| publisher | The Electrochemical Society of Japan |
| record_format | Article |
| series | Electrochemistry |
| spelling | doaj.art-9908b1783cfb480cb1ecbbdf8d687f4b2023-01-02T12:40:28ZengThe Electrochemical Society of JapanElectrochemistry2186-24512020-05-0188311912610.5796/electrochemistry.20-63011electrochemistryEDLC Characteristics of Carbon Materials Prepared from Coal ExtractHiroki WATANABE0Tomoki TSUMURA1Masahiro TOYODA2Oita University, Faculty of Engineering, Oita UniversityOita University, Faculty of Engineering, Oita UniversityOita University, Faculty of Engineering, Oita UniversityHPC is an ashless coal obtained via the thermal extraction of coal and is soluble in organic solvents. In this study, carbon powder was prepared from the HPC/pyridine solution via precipitation using water as a poor solvent and was subsequently carbonized via heat treatment at 900°C. The evaluation of the pore characteristics of the obtained carbon powder revealed that the carbon powders mainly contained micropores. The average pore diameter (Dave) of the micropores was 0.75 nm, suggesting that they are super-micropores or ultra-micropores. The applicability of the carbon powder was verified by examining the EDLC characteristics. The capacitance of the EDLC containing the aqueous solution of H2SO4 as the electrolyte was 170 F cm−3 (200–210 F g−1) at a current density of 50 mA g−1, denoting a capacitance similar to that of the activated carbon powder (YP-50F). The capacitance was 140 F cm−3 (170 F g−1) even when the current density increased from 50 to 5000 mA g−1, indicating a high retention rate of approximately 80%. Subsequently, the capacitance became 210 F cm−3 (260 F g−1) when the CO2 activation treatment was conducted for 60 or 90 min. Therefore, a high yield of carbon powders with extremely fine pores can be easily obtained via precipitation using HPC as the raw material.https://www.jstage.jst.go.jp/article/electrochemistry/88/3/88_20-63011/_pdf/-char/enhyper coaledlc characteristicsco2 activationprecipitation method |
| spellingShingle | Hiroki WATANABE Tomoki TSUMURA Masahiro TOYODA EDLC Characteristics of Carbon Materials Prepared from Coal Extract Electrochemistry hyper coal edlc characteristics co2 activation precipitation method |
| title | EDLC Characteristics of Carbon Materials Prepared from Coal Extract |
| title_full | EDLC Characteristics of Carbon Materials Prepared from Coal Extract |
| title_fullStr | EDLC Characteristics of Carbon Materials Prepared from Coal Extract |
| title_full_unstemmed | EDLC Characteristics of Carbon Materials Prepared from Coal Extract |
| title_short | EDLC Characteristics of Carbon Materials Prepared from Coal Extract |
| title_sort | edlc characteristics of carbon materials prepared from coal extract |
| topic | hyper coal edlc characteristics co2 activation precipitation method |
| url | https://www.jstage.jst.go.jp/article/electrochemistry/88/3/88_20-63011/_pdf/-char/en |
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