Korea Institute of Science and Technology

Osong Medical Innovation Foundation, Korea University Research and Business Foundation

Si Hyoung Oh

Byung Won Cho

Kyung Yoon Chung

Won Young Chang

Hyungseok Kim

Hun-Gi Jung

Minah Lee

Hyung Sun Kim

Yong Ho Lee

Dong Hyun Kim

Joong Kee Lee

Jae Hyun Cho

Sang Ok Kim

Ji-Hoon Lee

Ghulam Ali

Won Chang Choi

Hee-Dae Lim

Boeun Lee

Hyo Ree Seo

Hae Ri Lee

Young Soo Yun

Wonchang Choi

Susanto Dieky

Jung Hoon Ha

Yeojo Yoon

Woo Joo No

Min Ji Jeong

Junghoon Ha

Hyungi Jo

Ju Hyeon Ahn

Disclosed is a noble metal-manganese oxide composite catalyst for a positive electrode of an aqueous rechargeable battery that can regenerate a solvent of an aqueous electrolyte. Also disclosed are a method for preparing the composite catalyst, a positive electrode for an aqueous rechargeable battery including the composite catalyst, and an aqueous rechargeable battery including the positive electrode. The composite catalyst can regenerate reaction products, including gases continuously generated from spontaneous corrosion of the electrodes or side reactions, back to water to prevent depletion of the electrolyte. Due to this ability, the composite catalyst improves the life characteristics of the battery and suppresses the occurrence of excessive overpotentials at the electrodes. Therefore, the use of the composite catalyst is effective in preventing the performance of the battery from deteriorating. In addition, the composite catalyst can prevent an increase in the internal pressure of the battery resulting from gas generation and reduce the risk of fire or explosion, contributing to a significant improvement in the safety of the battery.

Composite catalyst for positive electrode of aqueous rechargeable battery, method for preparing the composite catalyst, positive electrode for aqueous rechargeable battery including the composite catalyst and aqueous rechargeable battery including the positive electrode

Disclosed is a calcined carbon material for a magnesium battery anode. The calcined carbon material includes catalytic carbon nanotemplates having a network structure in which nanofibers are entangled three-dimensionally. The calcined carbon material can be used as a magnesium battery anode material. Also disclosed is a method for preparing the calcined carbon material.

Calcined carbon material for magnesium battery anode and method for preparing the same

Provided is a cathode material for a rechargeable magnesium battery, represented by the chemical formula of AgSSe(0&#x2264;x&#x2264;1), a highly stable cathode material and a rechargeable magnesium battery including the same. The cathode material for a rechargeable magnesium battery has a higher discharge capacity and higher discharge voltage as compared to a typical commercially available cathode material, Chevrel phase, and shows excellent stability in an electrolyte for a rechargeable magnesium battery including chloride ions. In addition, after evaluating the cycle life of the cathode material, the cathode material shows an excellent discharge capacity per unit weight after 500 charge/discharge cycles, and thus is useful for a cathode material for a rechargeable magnesium battery.

Cathode material for rechargeable magnesium battery and method for preparing the same

Disclosed is an anode material for a sodium secondary battery. The anode material includes a tin fluoride-carbon composite composed of a tin fluoride and a carbonaceous material. The anode material can be used to improve the charge/discharge capacity, charge/discharge efficiency, and electrochemical activity of a sodium secondary battery. Also provided are a method for preparing the anode material and a sodium secondary battery including the anode material.

Anode material for secondary battery,secondary battery including the anode material and method for preparing the anode material

Provided is a furnace for a transmission mode X-ray diffractometer and a transmission mode X-ray diffractometer using the same. The furnace for a transmission mode X-ray diffractometer includes a sample heating unit disposed adjacent to a quartz capillary accommodating a sample to heat the sample, and a main body disposed to surround the quartz capillary and the sample heating unit and having an insulating function for allowing the heated sample to maintain a thermal equilibrium state.

Furnace for transmission mode X-ray diffractometer and transmission mode X-ray diffractometer using thereof

Provided are a cathode active material coated with a fluorine-doped spinel-structured lithium metal manganese oxide, a lithium secondary battery including the same, and a method for preparing the same. The cathode active material has improved chemical stability and provides improved charge/discharge characteristics at elevated temperature (55-60&#xb0; C.) and high rate. The cathode active material allows lithium ions to pass through the coating layer with ease and is chemically stable, and thus may be used effectively as a cathode active material for a high-power lithium secondary battery.

Cathode active material coated with fluorine-doped lithium metal manganese oxide and lithium-ion secondary battery comprising the same

Disclosed is an electrolyte solution for a magnesium rechargeable battery with a high ionic conductivity and a wide electrochemical window compared to the conventional electrolyte solution. The electrolyte solution is prepared by dissolving magnesium metal into the ethereal solution using combinations of metal chloride catalysts. The electrolyte solution can be applied to fabricate magnesium rechargeable batteries and magnesium hybrid batteries with a markedly increased reversible capacity, rate capability, and cycle life compared to those batteries employing the conventional electrolyte solution. Also disclosed is a method for preparing the electrolyte.

Electrolyte for magnesium rechargeable battery and preparation method thereof

There is provided a preparation method of a sodium vanadium oxide-based (NaVO) anode material for a sodium ion secondary battery synthesized by mixing particles of precursors such as sodium carbonate (NaCO) and vanadium oxide (VO) and pyrolyzing a mixture in a mixed gas atmosphere composed of 90 mol % of nitrogen gas and 10 mol % of hydrogen gas through a solid-state reaction. The sodium vanadium oxide-based anode material prepared according to the present invention shows a small change in volume caused by an initial irreversible capacity and continuous charge/discharge reactions, and thus it is useful for providing a next-generation sodium ion secondary battery having stable charge/discharge characteristics and cycle performance.

Sodium vanadium oxide anode material for sodium ion secondary battery, preparation method thereof and sodium ion secondary battery having the same

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Seoul, South Korea

Si Hyoung Oh