| Abstract Scope |
Aiming at the problems such as poor ionic conductivity, high viscosity of sodium-ion battery under extremely low temperature environment, the project developed a sodium-ion battery electrolyte with good low temperature performance, and successfully applied it to the research of low-temperature sodium-ion battery energy storage, improving the low-temperature resistance of sodium-ion battery. Carbonates and fluorinated solvents have significant antioxidant capacity. Make full use of these solvents and add them to cycloether-based electrolyte as cosolvent to improve the antioxidant capacity of the whole electrolyte. In this way, the electrolyte not only maintains the low temperature characteristics of ether solvents, but also improves the antioxidant capacity due to the presence of cosolvents. In this paper, a novel ether-based electrolyte with tetrahydrofuran (THF) as the main solvent is proposed, which can be used in the high pressure positive electrode of Na2/3Mn2/3Ni1/3O2 (MN) at a wide temperature range of -40 ~ 25℃. |