ELECTROLYTE SOLUTION COMPRISING SULFUR DIOXIDE-BASED IONIC LIQUID ELECTROLYTE, AND SODIUM-SULFUR DIOXIDE SECONDARY BATTERY HAVING SAME

摘要

The present invention relates to an electrolyte solution comprising a sulfur dioxide-based ionic liquid electrolyte, and a sodium-sulfur dioxide (Na-SO₂) secondary battery having same, the purpose of the present invention being to enhance the storage characteristics of sulfur dioxide gas in an electrolyte solution. The sodium-sulfur dioxide secondary battery, according to the present invention, comprises: a negative electrode which is formed from an inorganic material and which contains sodium; a positive electrode which is formed from a carbon material; and a sulfur dioxide-based inorganic electrolyte solution. Here, the electrolyte solution contains a sulfur dioxide-based ionic liquid electrolyte prepared by injecting SO₂ gas in an ionic liquid.