Electrochemical Cyclicvoltammetry of Activated Carbon Electrodes for Supercapacitors
For the problem of lower performance of supercapacitors based on activated carbon，according to a working principle of an electric double layer capacitor，activated carbon electrodes with mass fractions of 60%， 65%，70%，75% and 80% were prepared by a powder compression technology. Activated carbon，ac...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Harbin University of Science and Technology Publications
2018-02-01
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| Series: | Journal of Harbin University of Science and Technology |
| Subjects: | |
| Online Access: | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=1495 |
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| Summary: | For the problem of lower performance of supercapacitors based on activated carbon，according to a
working principle of an electric double layer capacitor，activated carbon electrodes with mass fractions of 60%，
65%，70%，75% and 80% were prepared by a powder compression technology. Activated carbon，acetylene
black，PTFE with the mass fraction of 15% and isopropanol were used as raw materials. The specific capacitance，
the specific energy and the specific power of the activated carbon electrodes were analyzed through cyclic
voltammetry tests with scanning rates at 5 mV/s，10 mV/s，20 mV/s，50 mV/s，100 mV/s and 200 mV/s. The
results show that the specific capacitance is 189. 3 F /g and the specific energy is 26. 3 W·h /kg when the mass
fraction of activated carbon is 70% and the scanning rate is 5 mV/s. The specific power is 916. 6 W/kg when the
mass fraction of activated carbon is 70% and the scanning rate is 20 mV/s. This study confirms the optimal ratio of
the mass fraction of activated carbon is 70%，providing an important reference for preparation of supercapacitors
based on activated carbon electrodes. |
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| ISSN: | 1007-2683 |