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Molecular origin of enhanced proton conductivity in anhydrous ionic systems
Wojnarowska, Z. Paluch, Krzysztof J. Shoifet, E. Schick, C. Tajber, L. Knapik, J. Wlodarczyk, P. Grzybowska, K. Hensel-Bielowka, S. Verevkin, S.P.
Wojnarowska, Z.
Paluch, Krzysztof J.
Shoifet, E.
Schick, C.
Tajber, L.
Knapik, J.
Wlodarczyk, P.
Grzybowska, K.
Hensel-Bielowka, S.
Verevkin, S.P.
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2015-01-28
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© 2014 American Chemical Society. This document is the Accepted
Manuscript version of a Published Work that appeared in final form in Journal of the American
Chemical Society, copyright © American Chemical Society after peer review and technical editing
by the publisher. To access the final edited and published work see
http://dx.doi.org/10.1021/ja5103458
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Abstract
Ionic systems with enhanced proton conductivity are widely viewed as promising electrolytes in fuel cells and batteries. Nevertheless, a major challenge toward their commercial applications is determination of the factors controlling the fast proton hopping in anhydrous conditions. To address this issue, we have studied novel proton-conducting materials formed via a chemical reaction of lidocaine base with a series of acids characterized by a various number of proton-active sites. From ambient and high pressure experimental data, we have found that there are fundamental differences in the conducting properties of the examined salts. On the other hand, DFT calculations revealed that the internal proton hopping within the cation structure strongly affects the pathways of mobility of the charge carrier. These findings offer a fresh look on the Grotthuss-type mechanism in protic ionic glasses as well as provide new ideas for the design of anhydrous materials with exceptionally high proton conductivity.
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Wojnarowska Z, Paluch KJ, Shoifet E et al (2015) Molecular origin of enhanced proton conductivity in anhydrous ionic systems. Journal of the American Chemical Society. 137(3): 1157-1164.
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