Ternary perfluor organic molten salt electrolyte, preparation method and application thereof

Abstract

The invention discloses a ternary perfluor organic molten salt electrolyte, preparation method and application thereof. The perfluor organic molten salt electrolyte is prepared from one perfluor organic lithium salt and two non-lithium alkali metal perfluor organic salts, or from two perfluor organic lithium salts and one non-lithium alkali metal perfluor organic salt, wherein the total mole fraction of the perfluor organic lithium salt is 10 to 70%. The preparation method is as follows: respectively weighing the required raw material components based on proportion; fully and evenly mixing theselected raw material components; then heating and fusing the mixture; then evenly milling the mixture after re-cooled so as to obtain the perfluor organic molten salt electrolyte. The molten salt electrolyte of the invention is advantageous in low melting point, high electrical conductivity, wide electrochemical window, excellent thermal stability and electrochemical performance. The invention can be applied to the fields, for example, lithium thermal battery.

Description

(1) Technical field

[0001] The invention relates to a ternary perfluorinated organic molten salt electrolyte and its preparation method and application, especially the application in lithium-based thermal batteries. (2) Technical background

[0002] Usually, molten salt contains at least one kind of salt, and is usually applied in a molten state. Molten salt has the advantages of low vapor pressure, low viscosity and good electrical conductivity in a wide temperature range. These characteristics determine that molten salt has a wide range of applications in industrial electrolysis, nuclear energy industry and material industry.

[0003] Due to the special properties of molten salt, it is also widely used in thermal batteries. Thermal battery is a kind of reserve battery, which uses the heating system of the battery itself to heat and melt the non-conductive solid-state electrolyte to present an ionic conductor and enter a heat-activated reserve battery in a working state. ...