title: Molecular origin of enhanced proton conductivity in anhydrous ionic systems.
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.
authors.affiliation: Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland.
authors.forename: Zaneta
authors.initials: Z
authors.lastname: Wojnarowska
authors.forename: Krzysztof J
authors.initials: KJ
authors.lastname: Paluch
authors.forename: Evgeni
authors.initials: E
authors.lastname: Shoifet
authors.forename: Christoph
authors.initials: C
authors.lastname: Schick
authors.forename: Lidia
authors.initials: L
authors.lastname: Tajber
authors.forename: Justyna
authors.initials: J
authors.lastname: Knapik
authors.forename: Patryk
authors.initials: P
authors.lastname: Wlodarczyk
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Grzybowska
authors.forename: Stella
authors.initials: S
authors.lastname: Hensel-Bielowka
authors.forename: Sergey P
authors.initials: SP
authors.lastname: Verevkin
authors.forename: Marian
authors.initials: M
authors.lastname: Paluch
mesh_terms: D004553:Electric Conductivity; D007477:Ions / Q000737:chemistry; D008012:Lidocaine / Q000737:chemistry*; D015394:Molecular Structure; D011522:Protons; D011789:Quantum Theory
chemical_list: D007477:Ions; D011522:Protons; D008012:Lidocaine