Korea Advanced Institute of Science and Technology

Il Woo Ock

Jeung Ku Kang

Jeung-Ku Kang

Kyung-Min Choi

Dong-Ki Lee

Dong Ki Lee

Hyung-Mo Jeong

Jung-Hyo Park

Gede Widia Pratama Adhyaksa

The present disclosure relates to a pseudocapacitive conductive composite including conductive polymer chains formed on a graphene sheet, a composite for an electrode including sub-nanoscale particles of a metal oxide or metal sulfide formed on a graphene sheet, and an aqueous hybrid capacitor including the composites as electrode active materials.

Pseudocapacitive conductive composite, composite including sub-nanoscale particles, and aqueous hybrid capacitor including the same as electrode active material

Disclosed is an energy storage device based on metal oxide nanocrystals resealed through lithiation, and a supercapacitor using the same. The energy storage device is fabricated by dispersing transition metal nanoparticles over a carbon-based support with a large specific surface area, and then, dispersing and resealing the nanoparticles over the support using lithium ions with strong reductive ability, so that the resealed metal particles are substantially particles dispersed and resealed over the support as particles having a size of less than 1 nanometer on the scale of atomic units. The supercapacitor is fabricated using the energy storage device. The energy storage device higher capacitance than before resealing of metal oxide. Since the resealed metal particles are those having a size of less than 1 nanometer on the scale of atomic units, interference between particles disappears to exhibit excellent cycle life characteristics of 100% maintained performance in even more than 100,000 cycles.

Energy storage device based on nanocrystals including metal oxide rescaled by lithiation and supercapacitor using the same

Disclosed is a technique for fabricating a bio-photovoltaic cell which includes coupling graminoids extracted from natural grasses to a semiconductor electron acceptor, on which plasmonic silver nanoparticles are aligned, by using an organic ligand material. More particularly, disclosed is a technique for fabricating a new renewable energy generation device useable for fabrication of high efficiency bio-photovoltaic cells by improving a photo-electron generation rate of graminoids through a surface plasmon effect of silver nanoparticles and increasing an effective photo-electron amount transferred to the electron acceptor due to optimized bonding between a photo sensitizer and an electron acceptor.

Method for fabricating a high efficiency bio-photovoltaic cells by using plasmonic silver nanoparticles and natural extracted graminoids

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Daejeon, South Korea

Il Woo Ock