Enhanced conductivity of sodium versus lithium salts measured by impedance spectroscopy. Sodium cobaltacarboranes as electrolytes of choice
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Other documents of the author: Fuentes, Isabel; Andrio, Andreu; Teixidor, Francesc; Viñas, Clara; Compañ, Vicente
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Title
Enhanced conductivity of sodium versus lithium salts measured by impedance spectroscopy. Sodium cobaltacarboranes as electrolytes of choiceDate
2017Publisher
Royal Society of ChemistryISSN
1463-9076; 1463-9084Bibliographic citation
Phys. Chem. Chem. Phys., 2017, 19, 15177Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/publishedVersionAbstract
The development of new types of ion conducting materials is one of the most important challenges in
the field of energy. Lithium salt polymer electrolytes have been the most convenient, and thus the most
widely used ... [+]
The development of new types of ion conducting materials is one of the most important challenges in
the field of energy. Lithium salt polymer electrolytes have been the most convenient, and thus the most
widely used in the design of the new generation of batteries. However, in this work, we have observed
that Na+ ions provide a higher conductivity, or at least a comparable conductivity to that of Li+ ions in
the same basic material. This provides an excellent possibility to use Na+ ions in the design of a new
generation of batteries, instead of lithium, to enhance conductivity and ensure wide supply. Our results
indicate that the dc-conductivity is larger when the anion is [Co(C2B9H11)2]
, [COSANE], compared to
tetraphenylborate, [TPB]. Our data also prove that the dc-conductivity behavior of Li+ and Na+ salts is
opposite with the two anions. At 40 1C, the conductivity values change from 1.05 102 S cm1
(Li[COSANE]) and 1.75 102 S cm1 (Na[COSANE]) to 2.8 103 S cm1 (Li[TPB]) and 1.5 103 S cm1
(Na[TPB]). These findings indicate that metallacarboranes can be useful components of mixed matrix
membranes (MMMs), providing excellent conductivity when the medium contains sufficient amounts of ionic
components and a certain degree of humidity. [-]
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Phys. Chem. Chem. Phys., 2017, 19Investigation project
ENE/2015-69203-R ; CTQ2013-44670-R ; 2014/SGR/149 ; 614168Rights
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