Sk Innovation Co., Ltd.

Ulsan National Institute of Science and Technology

Field Upgrading Usa, Inc.

Young Shol Kim

Jeong Soo Kim

Je Hyun Chae

Ku Bong Chung

Seung Hwan Jo

Won Sang Koh

Seung Ok Lee

Hee Young Sun

June Soo Lee

Kyu Tae Lee

Seung Hee Woo

Sung Wan Hong

Kwang Ho Ha

Provided is a Na based secondary battery including: an anode containing sodium or a sodium alloy; a cathode containing a metal halide, which is a halide of at least one metal selected from a group consisting of alkali metals, transition metals, and Groups 12 to 14 metals, and a solvent dissolving the metal halide; and a sodium ion conductive solid electrolyte separating the cathode and the anode from each other.

Na based secondary battery

Provided is a cathode active material for a secondary battery, specifically, a cathode active material for a secondary battery including sodium transition metal pyrophosphate satisfying NaAMM(PO), which has an advantage of structural stability due to a strong P&#x2014;O bond of sodium transition metal phosphate having an olivine structure, and also performs proper intercalation and deintercalation of Na ions having a large ion radius, thereby significantly improving reversibility during charging and discharging, and a charge and discharge rate.

Positive electrode active material for secondary battery

Provided is a current collector including a laminate in which a conductive substrate and an insulator are laminated, wherein the insulator is a porous insulator formed with an open pore channel penetrating through the insulator. The current collector may be used as a current collector for an electrode of a secondary battery and stably maintain capacity of the secondary battery at the time of repeating charge and discharge cycles.

Current collector for battery and secondary battery comprising the same

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.

Sodium secondary battery including graphite felt as current collector

Provided is a method for manufacturing a silicon carbide single crystal using a solution process including coming a seed crystal substrate for growing silicon carbide into contact with a Si&#x2014;C alloy solution including at least one additive metal and growing the silicon carbide single crystal on a seed crystal for growing silicon carbide, including feeding a silicon feedstock into an alloy solution when a molar ratio of Si and the additive metal is lower than an initially set value as the reaction progresses. The method increases a crystal growth speed, maintains the growth speed, and prevents the growth from unwillingly stopping when the silicon carbide single crystal is manufactured using a solution growth process.

Growing community of inventors

Daejeon, South Korea

Young Shol Kim