Mechanism of Conductivity Relaxation in Liquid and Polymeric Electrolytes: Direct Link between Conductivity and Diffusivity

• DOI: 10.1021/acs.jpcb.6b08567
• Publication Date: 2016-09-28T19:04:54Z
• Authors: C. Gainaru; E. W. Stacy; V. Bocharova; M. Gobet; A. P. Holt; T. Saito; S. Greenbaum; A. P. Sokolov
• Keywords: 02 engineering and technology; 0210 nano-technology; 3. Good health

Combining broadband impedance spectroscopy, differential scanning calorimetry, and nuclear magnetic resonance we analyzed charge mass transport in two polymerized ionic liquids one of their monomeric precursors. In order to establish a general procedure for extracting single-particle diffusivity from conductivity spectra, critically assessed several approaches previously employed describe the onset diffusive dynamics electrode polarization ion conducting materials. Based on analysis permittivity demonstrate that relaxation process provides information diffusion magnitude cross-correlation effects between motions. A new approach is introduced which able estimate diffusivities characteristic times concentration without any adjustable parameters. This opens venue deeper understanding concentrated diluted electrolyte solutions.