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Exploiting low-grad...
Exploiting low-grade waste heat to produce electricity through supercapacitor containing carbon electrodes and ionic liquid electrolytes
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- Haque, Mohammad Mazharul, 1984 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Abdurrokhman, Iqbaal, 1991 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Idström, Alexander, 1983 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Li, Qi, 1990 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Rajendra Babu Kalai Arasi, Azega, 1995 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Martinelli, Anna, 1978 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Evenäs, Lars, 1976 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Lundgren, Per, 1968 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Enoksson, Peter, 1957 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Elsevier BV, 2022
- 2022
- English.
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In: Electrochimica Acta. - : Elsevier BV. - 0013-4686. ; 403
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https://doi.org/10.1...
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Abstract
Subject headings
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- Low-grade thermal energy harvesting presents great challenges to traditional thermoelectric systems based on the Seebeck effect, the thermogalvanic effect, and the Soret effect due to fixed temperature gradient and low voltage output. In this study, we report an ionic thermoelectric system, essentially a supercapacitor (SC) containing an ionic liquid (IL) electrolyte and activated carbon electrodes, which works on the thermocapacitive effect and does not require any fixed temperature gradient, rather it works in a homogeneously changing temperature. A systematic investigation is carried out on SCs containing two different ILs, 1-Ethyl-3-methylimidazolium bis (trifluoromethylsulfonyl), EMIm TFSI, and 1-Ethyl-3-methylimidazolium acetate, EMIm OAc. A high voltage output of 176 mV is achieved for EMIm TFSI containing SC by exposing just to 60 °C environment. Moreover, a large voltage of 502 mV is recovered from the SC upon subjecting to heat after one electrical charge/discharge cycle. A system containing two SCs in series demonstrates a significant voltage of 947 mV. The observed performance difference between the two ILs is rationalized in terms of the extent of asymmetry in the interfaces of the electrical double layer that essentially originates from different diffusivity of individual ions. The mechanism can be applied to a plethora of ILs to exploit low-grade heat to store electricity without a fixed temperature gradient, opening up the possibility to merge different scientific communities and enrich this rising research field.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Annan kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)
Keyword
- Self-diffusion coefficient
- Ionic liquid
- Supercapacitor
- Low-grade heat
- Thermal charge
- Temperature gradient
Publication and Content Type
- art (subject category)
- ref (subject category)
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Haque, Mohammad ...
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Abdurrokhman, Iq ...
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Idström, Alexand ...
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Li, Qi, 1990
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Rajendra Babu Ka ...
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Martinelli, Anna ...
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show more...
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Evenäs, Lars, 19 ...
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Lundgren, Per, 1 ...
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Enoksson, Peter, ...
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- About the subject
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Mechanical Engin ...
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and Energy Engineeri ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Chemical Enginee ...
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and Other Chemical E ...
- Articles in the publication
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Electrochimica A ...
- By the university
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Chalmers University of Technology