Kceracell Co., Ltd.

Korea Research Institute of Bioscience and Biotechnology

Choong Hwan Lee

Hee Lak Lee

Hyeong Cheol Shin

Kyoung Tae Lim

Byung Sub Kim

Jae Hwa Choi

Su Jeong Lee

Dur Han Kwon

Wha Jeong Choi

Man Bae Kim

Jin Hee Kim

Disclosed is a ceria electrolyte for a solid oxide fuel cell, which is a ceria (CeO) electrolyte configured such that either gadolinium (Gd) or samarium (Sm) is co-doped with ytterbium (Yb) and bismuth (Bi), wherein Bi is doped in an amount of 0.5 to 5 mol %, thus exhibiting low-temperature sintering properties.

Ceria electrolyte for low-temperature sintering and solid oxide fuel cell using the same

Disclosed are a highly ionic conductive zirconia electrolyte and a high-efficiency solid oxide fuel cell using the same. The highly ionic conductive zirconia electrolyte is configured such that a scandia (ScO) stabilized zirconia (ZrO) electrolyte is simultaneously doped with cerium oxide (CeO) and at least one oxide of gadolinium oxide (GdO), samarium oxide (SmO), and ytterbium oxide (YbO) so that an ionic conductivity drop rate is mitigated.

Highly ionic conductive zirconia electrolyte for high-efficiency solid oxide fuel cell

The present invention relates to a flavonoid compound having an antiviral activity, more particularly to a flavonoid compound obtained by extractingwith methanol and separating/purifying with chromatography, a method for efficient extraction and purification of the same and an antiviral composition comprising the compound as an active ingredient.

Flavonoid compound having an antiviral activity

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Daejeon, South Korea

Choong Hwan Lee