Byungwoo Park
서울대학교 Materials Science and Engineering · 공학
Byungwoo Park 교수의 연구실은 에너지 저장 및 전도성 나노소재 분야에서 주로 활동하고 있으며, 리튬이on 이온 배터리 및 태양전지의 핵심 소재인 희토류 산화물, 아연 인산염, 티타늄 디옥사이드, 그래핀 복합체 등에 대한 나노구조 제어와 성능 최적화를 중심으로 연구를 진행하고 있습니다. 특히, 메조다공성 구조 설계, 전자 이동성 향상, 부피 변화 저항성 향상을 통한 장수명 전극 개발이 핵심 연구 방향입니다. 또한, 고성능 리튬-산소 배터리 및 페로브스카이트 태양전지의 효율성 향상을 위한 전자 수송층 및 활성층의 나노구조 제어 기술도 함께 연구하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Kapazitätssteigerung: Das Einfügen mesoporöser Strukturen als Pufferschicht verbessert die strukturelle Stabilität von Zinnphosphat und mindert die Volumenausdehnung der Zinnphosphatanode während der Aufnahme und Abgabe von Lithium (siehe TEM-Bild). Die mesoporöse Zinnphosphat/Sn2P2O7-Kompositanode ist durch eine große Anfangskapazität (721 mA h g−1) und eine ausgezeichnete Kreislauffähigkeit (587 mA h g−1 beim 30. Zyklus) gekennzeichnet.
Recently, SnO2 has been noticed as a promising material for electron-transport layer of planar perovskite solar cells. SnO2 layer presents advantages of low-temperature processability and high power-conversion efficiency, and understanding the correlations between the SnO2 properties and device performance will provide a key to realize more efficient perovskite solar cells. Herein, uniform electron-transport layer using SnO2 nanoparticles is fabricated, and the effect of annealing on the solar-c
A broad overview is presented describing the current knowledge and the ongoing research concerning the 4-aminoquinolines (4AQ) as chemotherapeutic antimalarial agents. Included are discussions of mechanism of action, structure activity relationships (SAR), chemistry, metabolism and toxicity and parasite resistance mechanisms. In discussions of SAR, particular emphasis has been given to activity versus chloroquine resistant strains of Plasmodium falciparum. Promising new lead compounds undergoing
Herein, underlying factors for enabling efficient and stable performance of perovskite solar cells are studied through nanostructural controls of organic-inorganic halide perovskites. Namely, MAPbI<sub>3</sub>, (FA<sub>0.83</sub>MA<sub>0.17</sub>)Pb(I<sub>0.83</sub>Br<sub>0.17</sub>)<sub>3</sub>, and (Cs<sub>0.10</sub>FA<sub>0.75</sub>MA<sub>0.15</sub>)Pb(I<sub>0.85</sub>Br<sub>0.15</sub>)<sub>3</sub> perovskites (abbreviated as MA, FAMA, and CsFAMA, respectively) are examined with a grain growt
Abstract This paper introduces oxygen‐deficient black TiO 2 with hierarchically ordered porous structure fabricated by a simple hydrogen reduction as a carbon‐ and binder‐free cathode, demonstrating superior energy density and stability. With the high electrical conductivity derived from oxygen vacancies or Ti 3+ ions, this unique electrode features micrometer‐sized voids with mesoporous walls for the effective accommodation of Li 2 O 2 toroid and for the rapid transport of reaction molecules wi
An effective way of synthesizing graphene-wrapped Li4Ti5O12 particles was developed by solid-state reaction between graphene oxide-wrapped P25 (TiO2) and Li2CO3. Compared to the previously reported graphene/Li4Ti5O12 composites, prior wrapping of TiO2 with subsequent chemical lithiation led to more effectively confined Li4Ti5O12. The Li4Ti5O12 tightly bound by graphene exhibited a remarkable specific capacity of 147 mA h g−1 at a rate of 10 C (1 C = 175 mA g−1) after 100 cycles. This rate capabi
Moving away from the high-performance achievements in organometal halide perovskite (OHP)-based optoelectronic and photovoltaic devices, intriguing features have been reported in that photocarriers and mobile ionic species within OHPs interact with light, electric fields, or a combination of both, which induces both spatial and temporal changes of optoelectronic properties in OHPs. Since it is revealed that the transport of photocarriers and the migration of ionic species are affected not only b
