Year: 2024
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide This study investigates a group of electrolytes containing NaPF 6 or NaBF 4 salts in phosphate- and ether-based solvents for high-mass loading sodium-ion batteries. It explores physicochemical properties such as ionic conductivity, dynamic viscosities, and nonflammability. The combination of experimental with computational studies reveals detailed insights into the physicochemical properties of the nonflammable liquid electrolytes. Diglyme-based electrolytes become nonflammable with 50 vol % phosphate solvents, while tetraglyme-based electrolytes require 70 vol %. The solvation structure has been investigated using NMR and is combined with computational studies to provide information about properties such as solvation structure, ionic conductivity, and viscosity. The molecular dynamic simulations confirm the enhanced solvation in diglyme-based liquid electrolytes observed experimentally by 23 Na-NMR. Despite lacking sufficient electrochemical stability, this work provides a fundamental understanding of the solvation structure and physicochemical properties of a novel electrolyte system. This is an important contribution to be applied in future electrolyte design rationale.
Authors: Wessel W. A. van Ekeren, Alexandre M. Pereira, Marcelo Albuquerque, Luciano T. Costa, Reza Younesi
Institutions: Uppsala University, Universidade Federal Fluminense
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: Swedish Foundation for International Cooperation in Research and Higher Education, VINNOVA, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Energimyndigheten, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
OpenAlex ID: W4403083326