Korea Institute of Energy Research

Korea Advanced Institute of Science and Technology

Dong-Ha Kim

Kyoung-Hee Shin

Sun-Hwa Yeon

Se-Kook Park

Sang Ho Lee

Jun Kyu Kim

Jung-Hoon Yang

Il-Doo Kim

Jung Joon Yoo

Bum-suk Lee

Jae-Deok Jeon

Kyu-Nam Jung

WooChul Jung

Hana Yoon

Chang-Soo Jin

Myung-seok Jeon

Chang-soo Jin

Joon-Mok Shim

Chanhoon Kim

Provided are a composite structure, in which metal nanoparticle-perovskite oxide is bound to metal oxide supports (i.e., sensing materials), and a preparation method thereof. The composite structure has improved durability, in which metal nanoparticles uniform in size are evenly distributed on the surface of perovskite oxide. Provided is also a high-performance gas sensor having excellent target gas detection performances by including the composite structure.

Method of manufacturing metal oxide gas sensor functionalized by multicomponent alloy nanoparticle-perovskite composite catalyst

Disclosed is a flow-type energy storage device having an improved flow of fluid. The flow-type energy storage device stores electricity using a fluidic material, and includes a reaction region in which charge-discharge reaction of electricity is performed by the fluidic material, wherein the reaction region has an octagonal cross-section. The shape of the reaction region is controlled to thus improve the flowability of the fluidic material, thereby providing a flow-type energy storage device that has almost constant electrical properties even when a charging and discharging cycle is repeatedly performed. Further, the structures of an inlet and an outlet are not complicated and a separate part for controlling the flow of fluid is not used in the device, and accordingly, additional costs are not incurred during a process of manufacturing the flow-type energy storage device.

Flow type energy storage device and reaction cell for the device

A method of manufacturing a graphene composite including an ultrasonic-wave pulverization post-treatment process. The method includes radiating a microwave on a mixture of graphite oxide and a conducting agent, dispersing a resultant material, obtained during the radiating the microwave, in a liquid and performing ultrasonic-wave pulverization, and freeze-drying particles subjected to the ultrasonic-wave pulverization. The post-treatment process is added to the method of manufacturing the graphene composite including the reduced graphene oxide using the graphite oxide, thereby manufacturing a graphene composite having improved bindability with spherical activated carbon used to manufacture an active material. Further, the post-treated graphene composite is used to manufacture the active material and the supercapacitor, and accordingly, the active material can be thinly and densely applied to provide a supercapacitor having improved performance.

Method of manufacturing graphene composite including ultrasonic-wave pulverization post-treatment process and method of manufacturing active material using the same

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Daejeon, South Korea

Dong-Ha Kim