Structural, thermal, and ion dynamics studies of PVA-CS-NaI-based biopolymer electrolyte films

Author(s):  
Devesh Chandra Bharati ◽  
Pooja Rawat ◽  
A. L. Saroj
2003 ◽  
Vol 50 (15-17) ◽  
pp. 2615-2643 ◽  
Author(s):  
Yusheng Dou ◽  
Ben R. Torralva ◽  
Roland E. Allen

2018 ◽  
Author(s):  
Nicola Molinari ◽  
Jonathan P. Mailoa ◽  
Boris Kozinsky

<div> <div> <div> <p>The model and analysis methods developed in this work are generally applicable to any polymer electrolyte/cation-anion combination, but we focus on the currently most prominent polymer electrolyte material system: poly(ethylene) oxide/Li- bis(trifluoromethane) sulfonamide (PEO + LiTFSI). The obtained results are surprising and challenge the conventional understanding of ionic transport in polymer electrolytes: the investigation of a technologically relevant salt concentration range (1 - 4 M) revealed the central role of the anion in coordinating and hindering Li ion movement. Our results provide insights into correlated ion dynamics, at the same time enabling rational design of better PEO-based electrolytes. In particular, we report the following novel observations. 1. Strong binding of the Li cation with the polymer competes with significant correlation of the cation with the salt anion. 2. The appearance of cation-anion clusters, especially at high concentration. 3. The asymmetry in the composition (and therefore charge) of such clusters; specifically, we find the tendency for clusters to have a higher number of anions than cations.</p> </div> </div> </div>


2018 ◽  
Author(s):  
Nicola Molinari ◽  
Jonathan P. Mailoa ◽  
Boris Kozinsky

<div> <div> <div> <p>The model and analysis methods developed in this work are generally applicable to any polymer electrolyte/cation-anion combination, but we focus on the currently most prominent polymer electrolyte material system: poly(ethylene) oxide/Li- bis(trifluoromethane) sulfonamide (PEO + LiTFSI). The obtained results are surprising and challenge the conventional understanding of ionic transport in polymer electrolytes: the investigation of a technologically relevant salt concentration range (1 - 4 M) revealed the central role of the anion in coordinating and hindering Li ion movement. Our results provide insights into correlated ion dynamics, at the same time enabling rational design of better PEO-based electrolytes. In particular, we report the following novel observations. 1. Strong binding of the Li cation with the polymer competes with significant correlation of the cation with the salt anion. 2. The appearance of cation-anion clusters, especially at high concentration. 3. The asymmetry in the composition (and therefore charge) of such clusters; specifically, we find the tendency for clusters to have a higher number of anions than cations.</p> </div> </div> </div>


2020 ◽  
Vol 65 (12) ◽  
pp. 1905-1911
Author(s):  
R. S. Ablizen ◽  
M. A. Monastyrskiy ◽  
M. G. Skoblin ◽  
A. V. Pento ◽  
A. B. Bukharina ◽  
...  
Keyword(s):  

Author(s):  
Roman Zettl ◽  
Katharina Hogrefe ◽  
Bernhard Gadermaier ◽  
Ilie Hanzu ◽  
Peter Ngene ◽  
...  

Author(s):  
Mauricio R. Bonilla ◽  
Fabián A. García Daza ◽  
Pierre Ranque ◽  
Frederic Aguesse ◽  
Javier Carrasco ◽  
...  

2014 ◽  
Vol 7 (8) ◽  
pp. 2739-2752 ◽  
Author(s):  
A. Dunst ◽  
V. Epp ◽  
I. Hanzu ◽  
S. A. Freunberger ◽  
M. Wilkening

Conductivity spectroscopy and 7Li spin-locking NMR relaxometry reveal enhanced ion dynamics in nanocrystalline Li2O2 prepared by high-energy ball milling.


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