Sk Innovation Co., Ltd.

Field Upgrading Usa, Inc.

JeHyun Chae

JeongSoo Kim

Sai Bhavaraju

Dai In Park

SeungOk Lee

Jongseon Kim

WonSang Koh

Provided is a sodium secondary battery including: an anode containing sodium; a cathode containing sulfur; a cathode electrolyte solution being in contact with the cathode and capable of conducting sodium ions into and from a solid electrolyte membrane; and a solid electrolyte separating the anode and the cathode electrolyte solution and having sodium ion conductivity. The sodium secondary battery of the present invention overcomes the problems of thermal management and heat sealing due to a high operating temperature, possessed by the existing sodium-sulfur battery or sodium-nickel chloride battery (so called, a ZEBRA battery), and may achieve high a charge and discharge mechanism characteristic.

Sodium secondary battery

Provided are an electrolyte for a sodium secondary battery, and a sodium secondary battery employing the same, and more particularly, a sodium secondary battery including an anode containing sodium, a cathode containing a transition metal, and a sodium ion conductive solid electrolyte provided between the anode and the cathode. The cathode is impregnated with a mixed salt electrolyte containing a molten sodium salt and an electrolyte additive, and the electrolyte additive contains a non-halogen sodium salt and a metal halide compound simultaneously.

Electrolyte for sodium secondary battery and sodium secondary battery employing the same

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Daejeon, South Korea

JeHyun Chae