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Polyimide-polyether...
Polyimide-polyether bindersediminishing the carbon content in lithium-sulfur batteries
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- Hernández, Guiomar (författare)
- Uppsala universitet,Strukturkemi,Univ Basque Country UPV EHU, POLYMAT, Joxe Mari Korta Ctr, Avda Tolosa 72, Donostia San Sebastian 20018, Spain
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- Lago, Nerea (författare)
- Univ Basque Country UPV EHU, POLYMAT, Joxe Mari Korta Ctr, Avda Tolosa 72, Donostia San Sebastian 20018, Spain
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- Shanmukaraj, Devaraj (författare)
- CIC EnergiGUNE, Alava Technol Pk,Albert Einstein 48, Minano 01510, Alava, Spain
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- Armand, Michel (författare)
- CIC EnergiGUNE, Alava Technol Pk,Albert Einstein 48, Minano 01510, Alava, Spain
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- Mecerreyes, David (författare)
- Ikerbasque, Basque Fdn Sci, E-48011 Bilbao, Spain;Univ Basque Country UPV EHU, POLYMAT, Joxe Mari Korta Ctr, Avda Tolosa 72, Donostia San Sebastian 20018, Spain
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(creator_code:org_t)
- Elsevier BV, 2017
- 2017
- Engelska.
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Ingår i: Materials Today Energy. - : Elsevier BV. - 2468-6069. ; 6, s. 264-270
- 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
- Lithium-sulfur batteries are on the run to become the next generation energy storage technology. First of all due to its high theoretical energy density but also for its sustainability and low cost. However, there are still several challenges to take into account such as reducing the shuttle effect, decreasing the amount of conductive carbon to increase the energy density or enhancing the sulfur utilization. Herein, redox-active binders based on polyimide-polyether copolymers have been proposed as a solution to those drawbacks. These multiblock copolymers combine the ability of poly (ethylene oxide) to act as polysulfide trap and the properties of the imide groups to redox mediate the charge-discharge of sulfur. Thus, poly (ethylene oxide) block helps with the shuttle effect and mass transport in the electrode whereas the polyimide part enhances the charge transfer promoting the sulfur utilization. Sulfur cathodes containing pyromellitic, naphthalene or perylene polyimide-polyether binders featured improved cell performance in comparison with pure PEO binder. Among them, the electrode with naphthalene polyimide-PEO binder showed the best results with an initial capacity of 1300 mA h g(-1) at C/5, low polarization and 70% capacity retention after 30 cycles. Reducing the amount of carbon black in the cathode to 5 wt%, the cell with the redox-active binder was able to deliver 500 mA h g(-1) at C/5 with 78% capacity retention after 20 cycles. Our results demonstrate the possibility to reduce the amount of carbon by introducing polyimide-polyether copolymers as redox-active binders, increasing the sulfur utilization, redox kinetics and stability of the cell. (C) 2017 Elsevier Ltd. All rights reserved.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Lithium-sulfur batteries
- Polyimides
- Redox mediators
- Redox-active binders
- Diminishing carbon
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- art (ämneskategori)
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