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Stable Cycling of Sodium Metal All-Solid-State Batteries with Polycarbonate-Based Polymer Electrolytes
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Strukturkemi.ORCID-id: 0000-0002-3374-2276
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Strukturkemi.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Strukturkemi.ORCID-id: 0000-0002-8019-2801
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Strukturkemi.ORCID-id: 0000-0002-9862-7375
2019 (engelsk)Inngår i: ACS APPLIED POLYMER MATERIALS, ISSN 2637-6105, Vol. 1, nr 4, s. 825-832Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Solid polymer electrolytes based on high-molecular-weight poly(trimethylene carbonate) (PTMC) in combination with NaFSI salt were investigated for application in sodium batteries. The polycarbonate host material proved to be able to dissolve large amounts of salt, at least up to a carbonate:Na+ ratio of 1:1. Combined DSC, conductivity, and FTIR data indicated the formation of a percolating network of salt clusters along with the transition to a percolation-type ion transport mechanism at the highest salt concentrations. While the highest total ionic conductivities were seen at the highest salt concentrations (up to a remarkable 5 x 10(-5) S cm(-1) at 25 degrees C at a 1:1 carbonate:Na+ ratio), the most stable battery performance was seen at a more moderate salt loading of 5:1 carbonate:Na+, reaching >80 cycles at a stable capacity of similar to 90 mAh g(-1) at 60 degrees C in a sodium metal/Prussian blue cell. The results highlight the importance of the choice of salt and salt concentration on electrolyte performance as well as demonstrate the potential of utilizing polycarbonate-based electrolytes in sodium-based energy storage systems.

sted, utgiver, år, opplag, sider
AMER CHEMICAL SOC , 2019. Vol. 1, nr 4, s. 825-832
Emneord [en]
polymer electrolytes, polycarbonates, sodium, batteries, ionic conductivity
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-392889DOI: 10.1021/acsapm.9b00068ISI: 000476966800025OAI: oai:DiVA.org:uu-392889DiVA, id: diva2:1354042
Forskningsfinansiär
EU, European Research Council, 771777 FUN POLYSTORETilgjengelig fra: 2019-09-24 Laget: 2019-09-24 Sist oppdatert: 2019-09-24bibliografisk kontrollert

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