Effect of polymerizing on lithium-ion transport in electrolyte

The effect of polymerizing 1,3-dioxolane (DOL) on the transport properties of the lithium (Li) ions in electrolytes from liquid to gel has been studied. After polymerization, liquid DOL electrolytes (LDOLEs) can form poly(1,3-dioxolane) (PDOL)-based electrolytes (PDOLEs), a gel polymer electrolyte w...

Full description

Saved in:
Bibliographic Details
Published in:Ionics 2023-02, Vol.29 (2), p.591-601
Main Authors: Xue, Jin-Xin, Liu, Feng-Quan, Jia, Si-Xin, Xiang, Tian-Qi, Xiang, Jun-Feng, Yan, Da-Dong, Zhou, Jian-Jun, Li, Lin
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemistry
Electrolytes
Energy Storage
Enthalpy
Ion transport
Lithium
Lithium ions
Lithium isotopes
NMR
Nuclear magnetic resonance
Optical and Electronic Materials
Original Paper
Polydioxolanes
Polymerization
Renewable and Green Energy
Transport properties
Trifluoromethane
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:The effect of polymerizing 1,3-dioxolane (DOL) on the transport properties of the lithium (Li) ions in electrolytes from liquid to gel has been studied. After polymerization, liquid DOL electrolytes (LDOLEs) can form poly(1,3-dioxolane) (PDOL)-based electrolytes (PDOLEs), a gel polymer electrolyte with DOL as self-plasticizer. The chemical environment of Li + ions is investigated with 7 Li nuclear magnetic resonance (NMR) and Raman spectrum. Compared with LDOLEs, the 7 Li NMR peaks of PDOLEs show upfield shift and increased full width at half-maximum, indicating more substantial shielding effect and larger Li + solvates. The diffusion coefficients of Li + ions ( D Li + ) are determined with pulsed field gradient NMR. The D Li + in PDOLEs decreases about two orders of magnitude than that in LDOLEs. Larger activation enthalpy is needed for PDOLEs than LDOLEs to change the coordination state of Li + ions due to the necessity of cooperative movement of several chain segments. The effect of bis(trifluoromethane)sulfonimide lithium salt concentration on the D Li + is mainly ascribed to the change of mixing entropy (Δ S ). In PDOLEs, the Δ S caused by the concentration variation has a more significant influence on the D Li + than that in LDOLEs.
ISSN:0947-7047
1862-0760
DOI:10.1007/s11581-022-04839-2