Role of solvation site segmental dynamics on ion transport in ethylene-oxide based side-chain polymer electrolytes

2021 ◽  
Author(s):  
Peter Bennington ◽  
Chuting Deng ◽  
Daniel Sharon ◽  
Michael A. Webb ◽  
Juan J. de Pablo ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Ethylene Oxide ◽  
Ion Transport ◽  
Polymer Electrolytes ◽  
Side Chain ◽  
Segmental Mobility ◽  
Segmental Dynamics ◽  
Chain Polymer

Ionic conductivity is governed primarily by the segmental mobility of the side-chain ethylene oxide units which form effective solvation sites, rather than system-wide dynamics.

Non-solvating, side-chain polymer electrolytes as lithium single-ion conductors: synthesis and ion transport characterization

2020 ◽  
Vol 11 (2) ◽  
pp. 461-471 ◽  
Author(s):  
Jiacheng Liu ◽  
Phillip D. Pickett ◽  
Bumjun Park ◽  
Sunil P. Upadhyay ◽  
Sara V. Orski ◽  
...  
Keyword(s):  
Ion Transport ◽  
Dielectric Relaxation ◽  
Polymer Electrolytes ◽  
Transport Mechanism ◽  
Lithium Ion ◽  
Side Chain ◽  
Chain Polymer ◽  
Single Ion Conductors ◽  
Ion Conductors

Non-solvating, side-chain polymer electrolytes with more dissociable pendent anion chemistries exhibit a dielectric relaxation dominated lithium ion transport mechanism.

Role of Free Volumes and Segmental Dynamics on Ion Conductivity of PEO/LiTFSI Solid Polymer Electrolytes Filled with SiO2 Nanoparticles: A Positron Annihilation and Broadband Dielectric Spectroscopy Study

2021 ◽  
Author(s):  
Pranav Utpalla ◽  
Sandeep Kumar Sharma ◽  
S. K. Deshpande ◽  
Jitendra Bahadur ◽  
Debasis Sen ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Sio2 Nanoparticles ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Segmental Dynamics ◽  
Broadband Dielectric Spectroscopy ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Limited ionic conductivity of polymer electrolytes is a major issue in their industrial application. Enhancement in ionic conductivity in Poly (ethylene oxide), PEO, based electrolyte have been achieved by loading...

Role of Molecular Architecture on Ion Transport in Ethylene oxide-Based Polymer Electrolytes

2021 ◽  
Author(s):  
Chuting Deng ◽  
Michael A. Webb ◽  
Peter Bennington ◽  
Daniel Sharon ◽  
Paul F. Nealey ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Ion Transport ◽  
Polymer Electrolytes ◽  
Molecular Architecture

A Systematic Study of Vinyl Ether-Based Poly(Ethylene Oxide) Side-Chain Polymer Electrolytes

2021 ◽  
Author(s):  
Andreas J. Butzelaar ◽  
Kun L. Liu ◽  
Philipp Röring ◽  
Gunther Brunklaus ◽  
Martin Winter ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Vinyl Ether ◽  
Systematic Study ◽  
Polymer Electrolytes ◽  
Side Chain ◽  
Chain Polymer ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

scholarly journals Study of the Segmental Dynamics and Ion Transport of Solid Polymer Electrolytes in the Semi-crystalline State

2021 ◽  
Vol 8 ◽  
Author(s):  
Xi Chelsea Chen ◽  
Robert L. Sacci ◽  
Naresh C. Osti ◽  
Madhusudan Tyagi ◽  
Yangyang Wang ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Ion Transport ◽  
Polymer Electrolytes ◽  
Crystalline State ◽  
Room Temperature ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Segmental Dynamics ◽  
Elastic Neutron ◽  
Elastic Neutron Scattering

Solid polymer electrolytes are promising in fulfilling the requirements for a stable lithium metal anode toward higher energy and power densities. In this work, we investigate the segmental dynamics, ionic conductivity, and crystallinity of a polymer electrolyte consisting of poly(ethylene oxide) (PEO) and lithium triflate salt, in the semi-crystalline state. Using quasi-elastic neutron scattering, the segmental dynamics of PEO chains confined between the crystalline lamellae is quantified, using Cole–Cole analysis. We show that the structural relaxation time, τ0, of PEO equilibrated near room temperature is six-fold longer than the same sample that had just cooled down to room temperature. This corresponds to a three-fold smaller ionic conductivity in the equilibrated condition. This work reveals that the segmental dynamics of semi-crystalline polymer electrolytes is very sensitive to thermal history. We demonstrate that quasi-elastic neutron scattering can be used to characterize the ion transport and segmental dynamics in the semi-crystalline state.

CONDUCTIVITY AND DIELECTRIC BEHAVIOR OF PLiAMPS-BASED SEMI-IPN SINGLE ION CONDUCTOR PLASTICIZED WITH POLY(SILOXANE-G-ETHYLENE OXIDE)

2012 ◽  
Vol 02 (03) ◽  
pp. 1250017
Author(s):  
WEIWEI CUI ◽  
DONGYAN TANG
Keyword(s):  
Dielectric Constant ◽  
Ionic Conductivity ◽  
Ethylene Oxide ◽  
Polymer Network ◽  
Dielectric Behavior ◽  
Interpenetrating Polymer Network ◽  
Segmental Mobility ◽  
Ion Conductor ◽  
Conductivity Variation ◽  
The Impact

Comb poly(siloxane-g-ethylene oxide) (PSi-PE) with high chain segmental mobility, as a plasticizer, was introduced into poly(lithium 2-acrylamido-2-methyl-1-propanesulfonate) (PLiAMPS)-based semi-interpenetrating polymer network single-ion conductors. The structures of PSi-PE and PLiAMPS were characterized by FTIR spectroscopy. The distribution of PSi-PE in polyelectrolyte matrix was investigated through observing the residual surface morphology of conductor membrane after being etched by toluene. AC impedance and dielectric behavior measurements were used to investigate the impact of PSi-PE on the ionic conductivity and to analyze the mechanism of conductivity variation. Compared with the unplasticized membranes, the ionic conductivity of the membrane with the addition of 35 wt.% PSi-PE was improved by 20 times. Meanwhile, the dielectric constant (ε) of the membrane was increased to 1330 and the relaxation time was decreased to 0.012 s. The changes of dielectric properties reflect directly the effect of PSi-PE on the dissociation ability of Li+ and the chain segmental mobility, which well explains the reasons of ionic conductivity variation.

Ion transport studies in PVA:NH4CH3COO gel polymer electrolytes

2020 ◽  
Vol 32 (2) ◽  
pp. 208-219
Author(s):  
CP Singh ◽  
PK Shukla ◽  
SL Agrawal
Keyword(s):  
Ionic Conductivity ◽  
Ion Transport ◽  
Salt Concentration ◽  
Polymer Electrolytes ◽  
Poly Vinyl Alcohol ◽  
Infrared Analysis ◽  
Gel Polymer Electrolytes ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Mobility Of Charge Carriers

Ion conducting gel polymer electrolytes (GPEs) are being intensively studied for their potential applications in various electrochemical devices. The poly(vinyl alcohol)-based GPE films containing ammonium acetate (NH4CH3COO) salt have been studied for various concentrations of salt. The gel electrolyte films (GPEs) have been prepared using solution casting technique. Structural characterization carried out using X-ray diffraction reveals an increase in the amorphous nature of the samples on increasing salt concentration up to 70 wt%. The complexation of polymer and salt has been studied by Fourier-transform infrared analysis. Ionic conductivity of the GPEs has been found to increase with salt concentration and reaches an optimum for an intermediate concentration. The room temperature conductivity isotherm exhibits a maximum in conductivity of 2.64 × 10−4 Scm−1 for 65 wt% salt concentration. The temperature dependence of ionic conductivity exhibits a combination of Arrhenius and Vogel–Tamman–Fulcher behavior. Ion transport in the electrolyte system has been explored using dielectric response of the material and the observed variation in conductivity is suitably correlated to the change in charge carrier concentration and mobility of charge carriers.

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