Sk Innovation Co., Ltd.

Ku Bong Chung

Jeong Soo Kim

Young Shol Kim

Seung Hwan Jo

Provided is a sodium secondary battery including: a sodium ion conductive solid electrolyte separating an anode space and a cathode space from each other; an anode positioned in the anode space and containing sodium; a cathode solution positioned in the cathode space; and a cathode immersed in the cathode solution and including graphite felt formed with open pore channel of which an opening part is formed on a surface of the graphite felt facing the solid electrolyte.

Sodium secondary battery including graphite felt having pore channels formed therein

Provided are a solid electrolyte for a sodium secondary battery, and a surface treatment method thereof, and more specifically, a solid electrolyte for a sodium secondary battery capable of having excellent electrochemical performance by improving wettability with respect to molten sodium, even under a low temperature operation environment of 250&#xb0; C. or less, and a surface treatment method thereof.

Surface treatment method of solid electrolyte for sodium secondary battery

Provided is a sodium secondary battery including a graphite felt having a maximum porosity on a surface facing a solid electrolyte and a decreased porosity in a thickness direction, as a cathode current collector impregnated with an electrolyte.

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Daejeon, South Korea

Ku Bong Chung