Molecular Origin of Enhanced Proton Conductivity in Anhydrous Ionic Systems

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 i...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the American Chemical Society 2015-01, Vol.137 (3), p.1157-1164
Main Authors: Wojnarowska, Zaneta, Paluch, Krzysztof J, Shoifet, Evgeni, Schick, Christoph, Tajber, Lidia, Knapik, Justyna, Wlodarczyk, Patryk, Grzybowska, Katarzyna, Hensel-Bielowka, Stella, Verevkin, Sergey P, Paluch, Marian
Format: Article
Language:English
Subjects:
Electric Conductivity
Ions - chemistry
Lidocaine - chemistry
Molecular Structure
Protons
Quantum Theory
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja5103458