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Graphene-based lith...
Graphene-based lithium ion capacitor with high gravimetric energy and power densities
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Ajuria, Jon (författare)
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Arnaiz, Maria (författare)
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Botas, Cristina (författare)
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Carriazo, Daniel (författare)
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Mysyk, Roman (författare)
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Rojo, Teofilo (författare)
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- Talyzin, Alexandr V. (författare)
- Umeå universitet,Institutionen för fysik
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Goikolea, Eider (författare)
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(creator_code:org_t)
- Elsevier, 2017
- 2017
- Engelska.
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Ingår i: Journal of Power Sources. - : Elsevier. - 0378-7753 .- 1873-2755. ; 363, s. 422-427
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Hybrid capacitor configurations are now of increasing interest to overcome the current energy limitations of supercapacitors. In this work, we report a lithium ion capacitor (LIC) entirely based on graphene. On the one hand, the negative-battery-type- electrode consists of a self-standing, binder-free 3D macroporous foam formed by reduced graphene oxide and decorated with tin oxide nanoparticles (SnO2-rGO). On the other hand, the positive-capacitor-type- electrode is based on a thermally expanded and physically activated reduced graphene oxide (a-TEGO). For comparison purposes, a symmetric electrical double layer capacitor (EDLC) using the same activated graphene in 1.5 M Et4NBE4/ACN electrolyte is also assembled. Built in 1 M LiPF6 EC:DMC, the graphene-based LIC shows an outstanding, 10-fold increase in energy density with respect to its EDLC counterpart at low discharge rates (up to 200 Wh kg(-1)). Furthermore, it is still capable to deliver double the energy in the high power region, within a discharge time of few seconds.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Tin oxide
- Reduced graphene oxide
- Activated graphene
- Supercapacitor
- Electric double layer pacitor
- Lithium ion capacitor
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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