“Thermal Charging” Phenomenon in Electrical Double Layer Capacitors
Electrical double layer capacitors (EDLCs) are usually charged by applying a potential difference across the positive and negative electrodes. In this paper, we demonstrated that EDLCs can be charged by heating. An open circuit voltage of 80-300 mV has been observed by heating the supercapacitor to...
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| Format: | Article |
| Language: | en_US |
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American Chemical Society (ACS)
2016
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| Online Access: | http://hdl.handle.net/1721.1/103928 https://orcid.org/0000-0001-9954-6895 https://orcid.org/0000-0002-3968-8530 |
| _version_ | 1826211032773689344 |
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| author | Wang, Jianjian Feng, Shien-Ping Yang, Yuan Hau, Nga Yu Munro, Mary Ferreira-Yang, Emerald C. Chen, Gang |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Wang, Jianjian Feng, Shien-Ping Yang, Yuan Hau, Nga Yu Munro, Mary Ferreira-Yang, Emerald C. Chen, Gang |
| author_sort | Wang, Jianjian |
| collection | MIT |
| description | Electrical double layer capacitors (EDLCs) are usually charged by applying a potential difference across the positive and negative electrodes. In this paper, we demonstrated that EDLCs can be charged by heating. An open circuit voltage of 80-300 mV has been observed by heating the supercapacitor to 65 °C. The charge generated at high temperature can be stored in the device after its returning to the room temperature, thus allowing the lighting up of LEDs by connecting the “thermally charged” supercapacitors in a series. The underlying mechanism is related to a thermo-electrochemical process that enhances the kinetics of Faradaic process at the electrode surface (e.g., surface redox reaction of functional group, or chemical adsorption/desorption of electrolyte ions) at higher temperature. Effects of “thermal charging” times, activation voltage, rate, and times on “thermally charged” voltage are studied and possible mechanisms are discussed. |
| first_indexed | 2024-09-23T14:59:29Z |
| format | Article |
| id | mit-1721.1/103928 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:59:29Z |
| publishDate | 2016 |
| publisher | American Chemical Society (ACS) |
| record_format | dspace |
| spelling | mit-1721.1/1039282022-10-01T23:48:43Z “Thermal Charging” Phenomenon in Electrical Double Layer Capacitors Wang, Jianjian Feng, Shien-Ping Yang, Yuan Hau, Nga Yu Munro, Mary Ferreira-Yang, Emerald C. Chen, Gang Massachusetts Institute of Technology. Department of Mechanical Engineering Chen, Gang Wang, Jianjian Feng, Shien-Ping Yang, Yuan Munro, Mary Ferreira-Yang, Emerald C. Chen, Gang Electrical double layer capacitors (EDLCs) are usually charged by applying a potential difference across the positive and negative electrodes. In this paper, we demonstrated that EDLCs can be charged by heating. An open circuit voltage of 80-300 mV has been observed by heating the supercapacitor to 65 °C. The charge generated at high temperature can be stored in the device after its returning to the room temperature, thus allowing the lighting up of LEDs by connecting the “thermally charged” supercapacitors in a series. The underlying mechanism is related to a thermo-electrochemical process that enhances the kinetics of Faradaic process at the electrode surface (e.g., surface redox reaction of functional group, or chemical adsorption/desorption of electrolyte ions) at higher temperature. Effects of “thermal charging” times, activation voltage, rate, and times on “thermally charged” voltage are studied and possible mechanisms are discussed. United States. Dept. of Energy (S3TEC Energy Frontier Research Center, Award Number DE-SC0001299/DEFG02- 09ER46577)) Research Grants Council (Hong Kong, China) (Award Number 17202314) 2016-08-16T14:57:31Z 2016-08-16T14:57:31Z 2015-08 2015-07 Article http://purl.org/eprint/type/JournalArticle 1530-6984 1530-6992 http://hdl.handle.net/1721.1/103928 Wang, Jianjian, Shien-Ping Feng, Yuan Yang, Nga Yu Hau, Mary Munro, Emerald Ferreira-Yang, and Gang Chen. "“Thermal Charging” Phenomenon in Electrical Double Layer Capacitors." Nano Letters 15:9 (2015), pp. 5784-5790. https://orcid.org/0000-0001-9954-6895 https://orcid.org/0000-0002-3968-8530 en_US http://dx.doi.org/10.1021/acs.nanolett.5b01761 Nano Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Chemical Society (ACS) Prof. Gang Chen |
| spellingShingle | Wang, Jianjian Feng, Shien-Ping Yang, Yuan Hau, Nga Yu Munro, Mary Ferreira-Yang, Emerald C. Chen, Gang “Thermal Charging” Phenomenon in Electrical Double Layer Capacitors |
| title | “Thermal Charging” Phenomenon in Electrical Double Layer Capacitors |
| title_full | “Thermal Charging” Phenomenon in Electrical Double Layer Capacitors |
| title_fullStr | “Thermal Charging” Phenomenon in Electrical Double Layer Capacitors |
| title_full_unstemmed | “Thermal Charging” Phenomenon in Electrical Double Layer Capacitors |
| title_short | “Thermal Charging” Phenomenon in Electrical Double Layer Capacitors |
| title_sort | thermal charging phenomenon in electrical double layer capacitors |
| url | http://hdl.handle.net/1721.1/103928 https://orcid.org/0000-0001-9954-6895 https://orcid.org/0000-0002-3968-8530 |
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