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Bipolar electrochem...
Bipolar electrochemical capacitors using double-sided carbon nanotubes on graphite electrodes
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- Hansson, Josef, 1991 (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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- Smith, Anderson David, 1985 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Zakaria, Isaac (author)
- University of California
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- Nilsson, Torbjörn, 1962 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Nylander, Andreas, 1988 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Ye, L. (author)
- SHT Smart High-Tech AB
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- Lundgren, Per, 1968 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Liu, Johan, 1960 (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, 2020
- 2020
- English.
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In: Journal of Power Sources. - : Elsevier BV. - 0378-7753. ; 451
- Related links:
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https://doi.org/10.1...
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Abstract
Subject headings
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- The electrochemical capacitor (EC) is a key enabler for the miniaturized self-powered systems expected to become ubiquitous with the advent of the internet-of-things (IoT). Vertically aligned carbon nanotubes (VACNTs) on graphite holds promise as electrodes for compact and low-loss ECs. However, as with all ECs, the operating voltage is low, and miniaturization of higher voltage devices necessitates a bipolar design. In this paper, we demonstrate a bipolar EC using graphite/VACNTs electrodes fabricated using a joule heating chemical vapor deposition (CVD) setup. The constructed EC contains one layer of double-sided VACNTs on graphite as bipolar electrode. Compared to a series connection of two individual devices, the bipolar EC has 22% boost in volumetric energy density. More significant boost is envisaged for stacking more bipolar electrode layers. The energy enhancement is achieved without aggravating self-discharge (71.2% retention after 1 h), and at no sacrifice of cycling stability (96.7% over 50000 cycles) owing to uniform growth of VACNTs and thus eliminating cell imbalance problems.
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 -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- Miniaturized self-powered systems
- Self-joule heating
- Self-discharge
- Series connection
- Volumetric
- CVD
- Supercapacitor
- Bipolar
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Hansson, Josef, ...
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Li, Qi, 1990
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Smith, Anderson ...
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Zakaria, Isaac
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Nilsson, Torbjör ...
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Nylander, Andrea ...
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show more...
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Ye, L.
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Lundgren, Per, 1 ...
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Liu, Johan, 1960
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Enoksson, Peter, ...
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show less...
- 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 Electrical Engin ...
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and Other Electrical ...
- Articles in the publication
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Journal of Power ...
- By the university
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Chalmers University of Technology